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MTZ 921 User Manual - MTZ Equipment Ltd.

1. ee 25 12 Voltage indicator 13 Engine coolant temperature indicator 14 Pneumatic system pressure indicator 15 Fuel tank level indicator 16 Engine oil pressure indicator 17 Control lights block 18 Tacho speedometer 19 Radio or audio receiver if any 20 Recirculating flaps 21 Heater front and rear working lights rear screen washer and wiper keys board 22 Sun visor 23 Air deflector 24 Clutch pedal 25 Steering wheel inclination control rod 26 Brake pedals 27 Fuel supply control pedal 28 Heater front and rear working lights rear screen washer and wiper circuit fuse block cover 29 Cab lamp 26 Fuel supply is controlled with a handle 9 or pedal 27 see fig at page 5 1 Moving the handle up push increase fuel supply and engine speed and vice versa IMPORTANT To control with a pedal 27 set the handle 9 to the middle position Multiplier is controlled with a lever 1 with two fixed positions e ON most rear position pull e OFF most forward position push direct drive IMPORTANT For synchronized multiplier 1 ON and OFF positions are reversed NOTE 1 The multiplier 1 is switched at minimal stable engine speed with pressed clutch pedal The multiplier 1 lever has no fixed neutral position Setting it to the middle position is allowed in winter to aid engine start only Gearbox is controlled with a lever N as follows e Chose
2. 87 Operation 18 Lubricating steering hydraulic cylinder ball joints each second TM 1 Using a syringe lubricate ball joints through 3 two grease fittings with Litol 24 grease or recommended substitute until the grease comes out in gaps Operation 19 Checking play is steering ball joints each second TM 1 Turn steering wheel in both directions with running engine to check free travel and play in ball joints 1 of steering rod 4 Perform the following in case of playing ball joints e Remove safety wire 3 e Tighten threaded plug 2 so as to eliminate eap in the ball joint Lock the plug NOTE If play cannot be removed by tightening threaded plugs disassemble the ball Joint and replace worn parts Operation 20 Adjusting free travel of friction clutch pedal each second TM 1 Adjust free travel of the friction clutch pedal see Section 7 Adjustments Operation 21 MTZ 821 2 921 921 2 921 3 921 4 Verify turbocompressor 1 exhaust manifold 2 and exhaust pipe bracket 3 fixing bolts torque Tighten the bolts to 35 40 Nm 3 5 4 0 kgf m 1f necessary Perform maintenance operation after 250 hours E r ue n Wii Winn jini 88 Maintenance No 2 TM 2 each 500 operating hours Includes mentioned above and the following operations Operation 22 Cleaning centrifugal eng
3. e Send injectors to a specialized workshop for inspection An injector is considered to be good in case of creating fuel fog with no separate drops continuous jets or concentrations Injection start and end should be clearly distinguished 100 There should be no drops at the sprayer tip Replace sprayer in case of impossibility to adjust injector Depreserve a sprayer prior to installing it into an injector by flushing with gasoline or warm diesel fuel e Install inspected clean and adjusted injectors performing above operations in reverse order Remove air form the system IMPORTANT Use new copper washers each time installing injectors Operation 50 Fuel pump injection lead angle Fuel pump injection lead angle should be set within indicated in Section 3 Technical specifications range Verify and adjust fuel pump lead angle in a specialized workshop IMPORTANT Fuel equipment adjustment by tractor operator owner is the basis for manufacturer s warranty termination Operation 51 Fuel pump bench adjustment Fuel pump is adjusted in specialized workshop with a bench 101 Operation 52 Engine cooling system flush Use solution of 50 60g of soda ash in 11 water to flush cooling system Flush the system as follows e Add 21 kerosene into the cooler and fill the system with prepared solution e Start and run the engine within 8 10 hours Drain the solution and flush cooling s
4. 2 Install and secure required 6 8 or 21 splined PTO end and engage appropriate drive 3 Grease the shaft and cardan slip joint pipe Install cardan pivot joint at PTO end and secure it in a fixing groove Ensure intermediate telescopic shaft pivot fork 1 eyes 2 being planar otherwise the cardan drive and PTO would be overloaded 4 Install cover for agricultural machine cardan shaft 5 Having installed cardan drive ensure no collision at cardan slip joint elements at extreme machine positions relatively to the tractor Minimal overlap at cardan telescopic part should be equal to 110 120 mm Lesser overlap may result in drive disengagement Agricultural machine safety coupling spring 3 length should be adjusted so as to allow cam half couplings 4 and 5 rotate in relation to each other at overload Overtightened spring result in coupling failure and cardan drive and PTO overload Tractor VOM end IMPORTANT Engage independent PTO drive at minimal speed or with the engine stopped Engage synchronous PTO drive with running engine and at smooth clutch coupling engagement Operating the tractor without PTO set PTO control arm to PTO OFF position and two speed PTO drive switching coupling to position I 540 RPM Shift lever switching between independent and synchronous PTO drive to the middle neutral position 42 Pneumatic system to control trailer s brakes Single line pneumati
5. Remove condensate from pneumatic system tank Service air filter if necessary Check front tire pressure and toe in Check and tighten if necessary external bolted connections including that of FDA cardan drive intermediate bearing bracket fixation powertrain casings rear wheel hubs hydraulic jack and front and rear wheel nuts Check air filter and engine intake leaks Repair if any Check operability of engine lighting and signaling systems screen washer and wiper 76 Lubrication and maintenance layout P 8 i E96 pF iss oY 6 oo 9 Ip Og SUR C REC TIN A M 1 ron TE A js aw EE d mo 77 SCHEDULED MAINTENANCE TABLE eo rn Sea add replace Shift maintenance SM each 10 operating hours 1 Engineoillevel 2 Coolantlevlincooder _ f j y 3 Oillevelinhydrauicsystemoiltank o J 4 Condensate removal from pneumatic tank 5 level power steering oil tank A eaa o main brakes tanks 7 Tirepressure Et ET poo l Maintenance No 1 TM 1 after 125 operating hours 8 Sediments from fuel tank and rough fuel filter J 9 Fanbet J Rear wheel hubs Front and rear wheels Pe o pog wheel nuts torque ll FDAreduciongearbearings dl T yY 12 A
6. 11 and insert the screw into eyes 6 of the tips by hand or with a wrench S 46 rotating bushing 14 ATTENTION Removing tips from ends of rods 2 insert pins 1 into the bores in the rods as per fig 3 Fasten the pins with split pins Split pins on eyes 6 and 13 of tips 5 and 12 are used to fasten lower rod pivots at their installation onto the tool hitch platform axle Pivots are included into RH set and supplied with the tractor e Fasten the plate and lugs 2 to the rod ends with bolts 4 and nuts and washers tightened to 320 360 Nm Fig 3 Tool hitch platform axle length adjusting mechanism 1 Pin 2 Rod 3 Spacer 4 Bolts and nuts 5 Left tip 6 Left tip eye 7 Plate 8 Pin 9 Stud 10 Shackle 11 Screw 12 Right tip 13 Right tip eye 14 Bushing with hexahedron 64 PTO and machine drive Tractor PTO end Machine PIC bushing PTO1S 8 splines PTO 1 6 splines PTO 2 21 splines Rotation speed RPM Transferred MAS power kW HP 1631 20815 Independent drive 1631 2081 1673 2184 59 4 80 91 53 4 72 5 Synchronous 3 9 rotations per meter drive 14 9R30 tires For MTZ 821 821 2 65 Such position of the hitched machine PIC in relation to the tractor s PTO allows using standard cardan shafts Rear PTO ensures synchronous machine actuation active semitrailers planting machi
7. 99 Operation 48 Changing oil in power steering tank Follow instructions of Operation 47 Turn fasteners and remove left side grill of the tractor s facing to access power steering tank Change oil in power steering tank as follows e Remove filler cap 2 and drain plug 3 Drain oil from the tank into a container for used oil e Reinstall drain plug 3 and add new oil to the upper mark at dipstick 1 e Reinstall cap 2 and left facing grill Special maintenance after each 2000 operating hours Includes above and the following operations Operation 49 Engine injector check IMPORTANT Check and adjust injectors in a specialized workshop WARNING Diesel fuel is sprayed and jet injected and may be a source of bad injury if to check injector spraying by hand Use paper or cardboard for that purpose Wear goggles Tighten all fuel line connections prior to starting the engine Immediately apply for medical care in case of fuel spraying to skin Remove and replace injectors as follows e Completely clear adjoining working surface prior to disconnecting or loosening any fuel System parts e Unscrew nuts 4 and disconnect high pressure fuel lines 5 from injectors 3 and fuel pump e Disassemble fuel lines 5 e Unscrew four banjo bolts 1 of drain line and disassemble drain fuel line 2 Replace sealing copper washers two per each bolt e Unscrew bolts 6 fixing injectors and remove injectors 3
8. For single line pneumatic drive 1 Connect pressure gauge of not less than 10 kgf cm capacity to a connection head of the tractor s pneumatic system 2 Switch compressor on and pressurize the tank up to 7 7 8 0 kgf cm according to an air pressure gauge at the dashboard Pressure gauge connected to connection head should indicate pressure of not less than 7 7 kgf cm otherwise act as follows e Verify 1 2 mm gap between pin 2 and upper edge of lever 1 groove e If there is no gap uncotter and remove pin 2 and rotate tip 3 to set rod length e Check and adjust if necessary spring 5 precompression to 36 38 mm rotating nuts 4 Then lock the nuts Pressure readings at pressure gauge connected to the connection head should fall to null with correctly adjusted brake valve actuator when interconnected brake pedals are fully pressed or parking brake is engaged to stop at tooth 2 4 3 Disconnect pressure gauge from connection head For double line pneumatic drive 1 Connect pressure gauge of not less than 10 kgf cm capacity to the control line connection head with yellow cap 2 Switch compressor on and pressurize the tank up to 7 7 8 0 kgf cm according to an air pressure gauge at the dashboard Pressure gauge connected to connection head should indicate pressure of 0 kgf cm otherwise act as follows e Verify 1 2 mm gap between pin 2 and upper edge of lever 1 groove e If there is no gap uncotter
9. adjust simultaneous braking if necessary e Check parking brake operability e Check light and sound signaling devices e Transporting trailers should be equipped with rigid hitches and safety chains or ropes e Never drive down the hill with gear disengaged coasting Drive the same gear up and down the hill e Never drive down the hill with engine stopped Oil pump should operate for safe steering e Never use trailers weighing more than a half of tractor s actual weight without independent braking system The faster you are driving and the greater is towed weight the longer should be safe distance e Disengage FDA to avoid excessive drive parts and front tires wear e Do not lock rear axle differential when turning or driving faster than 10 km h e Never stop at slope In need to stop engage the 1 gear and parking brake 24 Stop the engine and ensure PTO end stop prior to leaving the cab and disconnecting machinery when working with PTO driven attachments 25 Never wear loose cloths when operating PTO or near rotating machines 26 Always engage parking brake and block rear wheels with wedges on both sides Ensure secure fixation of the machine 27 Use synchronous PTO drive for lower GB gears at speed not exceeding 8 km h otherwise tractor s powertrain may be badly damaged Set independent and synchronous drives rod to middle OFF position and replace PTO end cap 28 Never clean adjust or service PTO
10. e Press interconnected pedals several times until it starting to resist Keep pedals pressed and open valve 12 of the left actuating cylinder by 1 2 3 4 turn to discharge fluid with air bubbles from the system through the hose Shift pedals forward to stop close the valve and release pedals Repeat the procedure several times to completely remove air Repeat the procedures above for the right actuating cylinder Observe fluid level in the tanks while flushing do not let it down below MIN mark 1 3 1 4 of the tank capacity Having completed flushing put protective caps on and add fluid to MAX mark or to the level at 1545 mm from the top edge of the tank Verify free pedals stroke separately with force equal to 300 10 N 30 1 kgf The stroke should be equal to 100 120 mm otherwise adjust the stroke as follows Unscrew locknuts 15 of bolts 9 and 10 by several turns 2 Rotate bolts 9 and 10 to set required pedal stroke 3 Lock the bolts Check brakes operability in motion and if necessary readjust to ensure simultaneous braking start for both wheels with bolts 9 and 10 as follows unscrew locknut 15 of lagging wheel brake and screw adjusting bolt in to make braking start simultaneous tighten locknuts 15 54 IMPORTANT Braking distance should not exceed 6 m when driving at 20 km h at dry asphalt with interconnected brake pedals Braking nonsimultaneity should not exceed 0 5 m driving path should
11. f Length with loads and rig attachment mm 4280 Length without loads with rig attachment in transporting A sa 4225 position mm Length at overall wheels diameters mm 3450 DEBE Width with front and rear rig attachment in transporting 4500 position mm Widh mm 1 150 C Hegh mm o 230 D Whelbase mm gt Z 9 240 F Rearaxletrack mm 116005885 _ Ground clearance under the rear axle mm 257 o o _ Ground clearance under front axle mm 35 0 Delivery weight kg 42400010 A Tractor component numbers Tractor s nameplate with stated machine and engine serial numbers outside the right cab side E lt 5 Ne TPAKTOPA Ns Serial number of the tractor is repeated the left rail of the half frame or at front loads plate 0 CUm IE vo mim nmi we om int mm m mot I m Engine number repeated at the engine nameplate fixed to the engine head Ss C MHHCRHH O 243 EIE e MADE T4REPUELE BELARUS o Gearbox number at th
12. single disk with tangentially suspended pressure plate Plate diameter 340 mm Drive hydrostatic with suspended pedal Engine cooling system Type water cooled closed with forced water circulation with temperature control by thermostat Normal operating temperature 75 C to 95 C Thermostat TS 107 Cooling system capacity 17 1 19 1 Coolants Basic e OJ 40 OJ 65 Substitute e Tosol A40M A65M Foreign e MIL E 5559 FL 3 Sort S 735 Steering Type hydraulic displacement with hydraulic cylinder in steering trapezium Pump performance 3 l min for MTZ 821 821 2 25 l min for 821 3 921 921 2 921 3 921 4 Hydraulic cylinder double acting cylinder diameter 50 mm piston stroke 250 mm MIZ 13 Metering pump volumetric constant 160 cm turn operating pressure up to 14 MPa Installed at front cab side Steering column stepless height adjustment within 100 mm Inclination adjustment 25 to 40 with 5 pitch Steering wheel free move up to 25 Gearbox Type 18x4 mechanical fixed ratio dual ranged sliding gear transmission 14x4 synchronized at request Multiplier Type of both assemblies mechanical with direct and 1 36 step up gears at multiplier and direct and 1 32 step down gears at back gear Form 18 forward driving and 4 rearward driving gears Back gear for MTZ 821 821 2 14 Estimated tractor speeds in km h at rated diesel engine cranks
13. C Transmission oil TAp TAD 171 TSp 15K TSp 10 transmission oil 0 3 0 3 2 ous noe MI rs updated M 10G2x summer M 8Gok 1 Clutch shifter 4 6 syringe 4 6 syringe pressings pressings Grease Litol 24 Bechem universal LCP GM 0 0125 0 0125 2 Dilute with AU spindle oil GOST 1642 75 or I 12A industrial oil GOST 20799 75 up to 30 at temperature 15 C to 20 C Dilute with up to 15 winter diesel fuel at temperature to 55 C 103 Section 11 STORAGE Tractor storage Perform the following prior to long term storing the tractor Wash the tractor Place the tractor in shelter or room Squirt all lubricated points see Section 10 Maintenance Drain oil from the engine oil pan powertrain hydraulic system and power steering tanks FDA housing wheel reduction gears and intermediate bearing fill with fresh clean oil Drain fuel from fuel tanks preservation fuel Run engine within 3 5min to fill fuel system with fuel Lift RH rods to the highest position Disconnect and charge batteries store them in a dry vented room at 15 20 Check and charge if necessary them monthly Jack front and rear axles and place supports to unload tires Depressurize the tires to 70 of normal pressure Drain coolant from engine cooling and cab heating systems Loosen fan belt Cover exhaust pipe opening and add 51 Drain sediment from rough and fine fuel filters Preser
14. Maintenance No 3 TM 3 1000 Special maintenance 2000 Seasonal maintenance TM SS and TO O3 At starting autumn and winter TO O3 or spring and summer TO S5 operation Maintenance in special operating conditions While preparing for operation in special conditions Maintenance at storage 75 MAINTENANCE TO PREPARE TRACTOR FOR OPERATION Observe Section 6 Preparation to work and work order while preparing the tractor to operational break in Maintenance during break in Perform shift maintenance while breaking the tractor in see SM operations below Maintenance after operating hours 1 Examine and clean the tractor 2 Listen to engine and other components operation 3 Verify cylinder head bolts tension Tighten if necessary 4 Verify and adjust if necessary gaps between engine valves and rockers 5 Clean centrifugal oil filter rotor 6 Check and adjust if necessary fan belt tension 7 Discharge sediment from the fuel tank and rough fuel filters 8 Check operability of clutch brakes pneumatic drive Service if necessary 9 Check and service if necessary the battery break in after 30 10 Change oil in 1 m 12 13 14 15 16 Lh 18 19 e Engine oil pan e Powertrain casings e Wheel reduction gears and main FDA drive and intermediate bearing Replace filter element of RH hydraulic system Clean engine oil prefilter mesh Squirt all lubrication points
15. adjust steering wheel by height e Unscrew clamp 1 by 3 5 turns e Move the wheel 2 as required e Tighten the clamp 1 by hand as possible NOTE The steering wheel can be adjusted by height within 100 mm Steering column may be inclined and fixed in four positions from 20 to 40 with 5 pitch To adjust the column pull handle 3 incline the steering column as required and release handle 3 Cab door latch Handle 4 is used to open the cab door from inside by pulling Handle 5 disable cab door opening from outside when pulled 36 Cab heater control To activate cab heater e Open the valve turning handle 1 counterclockwise to stop e Turn heater fan on with a switch 2 and adjust air direction as required with regulated flaps air deflectors 4 Opening and closing recirculation flaps 3 amount of fresh air entering the cab may be regulated NOTE Fully open recirculation flaps 3 and run the heater fan at high speed with a switch 2 to quickly warm up the cab NOTE Close the valve to run the system for venting at warm weather 9 27 Section 6 PREPARATION TO WORK AND WORK ORDER Preparing tractor to work Depreserve tractor to prepare it for work as follows e Remove protective covers and plugs from the engine Fill all refill capacities Remove sediments from rough and fine fuel filters and from fuel tank Fill and flush fuel supply system wit
16. and remove pin 2 and rotate tip 3 to set rod length e Check and adjust if necessary spring 5 precompression to 36 38 mm rotating nuts 4 Then lock the nuts e Pressure readings at pressure gauge connected to the connection head should rise to 6 5 8 0 kgf cm with correctly adjusted brake valve actuator when interconnected brake pedals are fully pressed or parking brake is engaged to stop at tooth 2 4 e Disconnect pressure connection head If brake valve actuator adjustment cannot ensure the above pressure settings dismount the brake valve and send to a workshop for repair gauge from IMPORTANT Pressure readings at pressure gauge connected to the connection head should fall to null for a single line system and to rise to 6 5 8 0 kgf cm for a double line system with correctly adjusted brake valve actuator when interconnected brake pedals are fully pressed or parking brake is engaged 57 Checking and adjusting pressure regulator of pneumatic system After 100 working hours TM 3 in case of incorrect pressure regulator operation or after its disassembly for cleaning or worn parts replacement the pressure regulator should be adjusted as follows 1 Connect a pressure gauge with 0 1 0 2 kgf cm graduating marks and not less than 16 kgf cm capacity to perform check and adjustment Remove cap 1 Fully screw cap 2 into the casing with a wrench Start engine Switch compressor on and pressu
17. back to ON position Install rod 4 fig 1 Adjusting rods 4 and 15 ensure arm 1 rocking area in the middle of the control board opening completion of adjustment replace the stop plate 26 fig 2 and rear axle cap lock rods 4 and 15 and bolt 9 fig 1 50 26 29 mm Fig 1 Rear PTO control 1 Control arm 2 Adjusting fork 3 8 Locknuts 4 Rod 6 Springs 7 Outer sleeve 9 Stop bolt 10 Adjusting bolt for adjustment only 11 Control roller arm 12 Control roller 13 Adjusting screws 14 Inner sleeve 15 Rod If e PTO slips e Switching force at arm 1 exceeds 12 15 kgf 120 150 Nm e Brake bands are partially worn then adjust band brakes PTO cap allows external adjustment to ensure maximum efficiency of external readjustment by turning eccentric shaft by 180 as follows Set arm 11 fig 1 to neutral position and fix it inserting 8mm stud 10 or M10x60 bolt into a bore in the arm 11 and corresponding hole in the rear axle case 2 Unscrew bolt 16 fig 2 remove plate 17 from splined end at axle 15 3 Turn eccentric axle 15 clockwise with S l3mm wrench to get required clearance between brake band and PTO drum PTO end cannot be turn by hand 4 Replace plate 17 and tighten bolt 16 5 Remove stopping bolt or stud from arm 11 fig 1 After several external adjustments eccentric axle may take t
18. below LII See manual Brake Hand brake Horn Alarm signaling Fuel Coolant Electric starting preheater gt 190 Engine speed n min Engine oil pressure Engine coolant temperature Open Close Gradual change RH lever down RH lever up External cylinder push out External cylinder retraction External cylinder floating Clogging air filter i th Ono rial v TA a iy ITN Ate aN er x SO Jo a Controls operation Fast Slow Forward Backward Battery charging Cab limp Side lights Turn indicators Upper beam Lower beam Operation lights Differential lockup Power take off engaged Front axle engaged Fan Screen washer Z 4 af i 1 Windshield wiper Rear window washer and wiper a1 D Trailer turn indicator n min Engine start starter control unit indicating lamp Section 2 SAFETY REGULATIONS Carefully follow precautions and regulations in tractor operation and maintenance to ensure work safety General notes 1 Carefully study the present operator s manual prior to operating the tractor Insufficient knowledge on driving and operating the tractor may cause accidents 2 Specially trained and qualified ope
19. driven machines with running engine 29 Driving with installed agricultural rigs faster than 15 km h is not allowed Safety regulations for maintenance 30 Never fuel the tractor up with running engine 31 Never smoke when fuelling the tractor up 32 Do not fill fuel tanks to the full leave enough space for fuel to expand 33 Never add gasoline or mixes to diesel fuel to avoid increased fire or explosion hazard 34 Timely apply summer and winter fuels Fill fuel tank in the end of each day to reduce condensation at night 35 All operations related to engine or tractor cleaning preparation to work servicing etc should be done with stopped engine and braked tractor 36 Engine cooling system 15 constantly pressurized with a valve in radiator s filler cap Do not remove the cap with hot engine Always slowly turn the cap to depressurize 37 Be careful not to burn yourself when discharging coolant or water from cooling system hot oil from engine hydraulics or transmission 38 Be careful when servicing batteries spoiled electrolyte shall burn skin 39 Avoid open fire close to the engine fuel system and batteries to prevent explosion hazard 40 Keep tractor and its systems particularly brakes and steering operable to ensure personal safety for operator surrounding people 41 Modifications to the tractor or its certain components without prior approval by a dealer and manufacturer are prohib
20. keep straight 55 Parking brake IMPORTANT Parking brake should be adjusted after main brake pedals only Parking brake should be adjusted as follows 1 Uncotter and remove pin 7 2 Disconnect fork 6 from arm 14 Uncotter and remove pin 10 with washers to disconnect brake valve rod from arm 11 Screw bolts 12 into parking brake control arms 13 to set clearance between their edges and brake lever plates Ensure no gap between actuating cylinder fork 8 groove edge and brake lever pin 9 4 Loosen locknut 5 and turn fork 6 to change rod 4 length so that pin 7 freely connects the rod to the lever 14 Lock the rod with locknut 5 and cotter the pin 5 Connect brake valve rod to lever 11 placing washers and ensuring 1 2 mm gap between pin 10 and upper edge of lever 11 groove Cotter the pin see adjusting brake valve and its actuator With correctly adjusted brake 400N force at handle 1 should make latch 15 secure the handle at tooth 2 4 of sector 3 and ensure tractor holding at 18 slope 56 Checking and adjusting brake valve of pneumatic system and its actuator Pneumatic line of trailer brakes features brake valve 6 Check and adjust if necessary brake valve operation to ensure correct operation of the brake valve and brakes of trailers connected to the tractor Perform adjustment with free brake controls after main brakes and parking brake adjustment
21. necessary repair workshop Engine shows insufficient power No full fuel supply due to misadjusted fuel Adjust control rods pump control rods Replace filter element Reveal faulty injectors wash and adjust Set recommended fuel injection lead angle Service air filter Remove air from the fuel system Adjust idling spring Disassemble fuel pump from the engine and send to repair workshop A Black fume from exhaust pipe Injector sprayer needle hanging up Reveal faulty injector wash or replace sprayer adjust the injector if necessary send to repair workshop Warm the engine up keep coolant temperature within 75 95 C range at operation rockers Replace fuel Incorrect fuel injection lead angle Set recommended fuel injection lead angle C Blue smoke from exhaust pipe piston cylinder group Excessive oil in engine oil pan upper mark of oil dipstick Engine overheating Boiling coolant in cooler Clean the cooler of dirt and dust Clean cooling system of scale 1f necessary Adjust fan belt tension Poor fuel dispersion by injectors Reveal faulty injectors clean wash adjust 71 REMEDY Replace Correct malfunction or replace the pump Add oil to the upper mark at oil dipstick Rinse the valve and adjust pressure Extremely worn junctions crankshaft necks Send engine for repair bearings POWERTRAIN CLUTCH Clutch shall not transfer full torque Adjust free travel of the pedal Replace drive plate ass
22. panel to install coupled machine operation control board 68 ATTENTION Consider the following when connecting TMA In any case of tractor operation with or without the machine overall axle loads may exceed maximum permissible tractor s service weight Front axle load should always with or without the coupled machine be equal to not less than 20 0 2 of tractor s service weight Using safety chains ropes for trailers and semitrailers 1s obligatory Hydraulic systems of the tractor and coupled machines should always be connected with cutoff clutches Never use connecting oil lines with flow section less than 12 mm as 15 causes oil overheating in hydraulic system and early pump breakdown Coupled machine s cardan should be equipped with safety devices safety cover or guards Transport works Almost half time the tractor is used in transport and has access to public roads Thus transport TMAs are subject to higher safety requirements According to GOST tractor trailers and semitrailers should be equipped with main and parking brakes safety chains or ropes Main brakes system is of single line type and is controlled from operator s working place Parking brake actuator should be located at the machine Vehicles are connected via 1 01 at TMA driving speed not exceeding 15 km h Trailers and semitrailers should have maximum speed limit sign located at the rear to the left TMA overall dimensions should not exce
23. pressure cell 1 SI Al SA2 SA3 SA4 105 in connectors XP1 3 XP1 4 XP2 5 XP9 3 XP15 2 Block XS2 1 XS2 5 Block XS2 9 XS2 10 XS2 7 XS2 8 lock XS3 1 53 3 lock XS4 1 XS2 2 XS2 3 Block XS2 4 52 6 lock cket ocket cket ocket ree board XII WAT Jenna XS9 2 X59 3 lock 106
24. side board Its movement range corresponds to full ploughing depth range from minimal to maximal Positioning handle is located to the right from force adjustment handle Its movement range corresponds to suspension positions from the lowest to the transport Distributor is of flowing through type without bypass valve Is consists of 3 sections each having four positions neutral lifting up lifting down and floating The tractor 1s equipped with pneumatic system to control braking systems of trailers in single driven mode 23 Towing coupler double crossbeam TCY 1 01 is united with rear digging mechanism into a single assembly unit At request a single crossbeam may be mounted meeting DIN requirements and fixed on the lower rod jaws Tractor cab is safe and comfortable The cab is equipped with venting and heating system with air intake through filters over the side windows Design of filters in venting system allows its partial self cleaning in motion Naturally the cab is vented through a hatch in the roof and opening rear and side windows The cab is equipped with a comfortable seat with mechanic suspension hydraulic damper the seat 15 adjusted per operator s height and weight Steering wheel is located right in front of the seat and may be thrown over to ease getting into and out of the cab The steering wheel is height adjusted by 100 mm Control station is designed to ensure comfort w
25. upper conical pair each 0 Hydraulic system oil tank 25 0 Power steering oil tank 6 0 X Fuel tank 5 FDA cardan drive intermediate bearing housing 12 0 1 6 159 3 95 For MTZ 921 3 921 4 80 Shift maintenance SM each 8 10 operating hours or daily Operation 1 Engine pan oil level check Stop the engine and check oil level in 15 minutes Oil level should locate between the upper and the lower marks at oil dipstick 3 Remove oil filler neck 1 cap 2 and add oil to the upper mark at the dipstick 3 if necessary IMPORTANT Do not overfill engine with oil Burning excessive oil may be erroneously interpreted as great oil consumption Never allow the engine run with oil level below the lower mark at the dipstick Operation 2 Coolant level in cooler check Remove cooler cap and check coolant level Coolant level should be 50 60 mm below the filler neck edge 1 Add coolant if necessary WARNING Cooling system is pressurized Pressure is controlled by the cooler cap valve Removing the cap from hot engine is dangerous Leave the engine to cool down Cover the cap with cloth and turn the cap slowly to depressurize gradually prior to complete cap removal Avoid burning by hot liquid Operation 3 Hydraulic system oil tank level check Place the tractor on a plain horizontal ground prior to check oil level Check oil level with an oil meter 2 The level should locate between 0 and II ma
26. used for trailed agricultural machines connection pin kingpin diameter is 30 mm The crossbar ensures standard distance between jaws Tip are fastened to the lower rod ends with pins 6 and split pins with rings Pins may be inserted into either upper or lower biased bores at the tips to ensure the platform axle length equal to 870 mm Telescopic drawbars TS fig 2 lock the lower rods tool or rocking within 55 mm Locked position is used for operation with hitched and trailed agricultural machines and tools save for machines with active operating elements mills etc To lock insert splined pin 4 into the outer tube 2 bore 5 and the inner tube 2 bore aligned by rotating screw 1 with a handle 6 To ensure RH rocking e Remove splined pin 4 from the tube e Install crossbar 9 fig 1 symmetrically to longitudinal axis of the tractor e Turn a screw to align the inner tube bore at the groove center of the outer one e Insert the splined pin into the groove and the bore to lock e Lock handle 6 fig 2 on flattened surfaces of the inner tube Fig 1 RH and TC 1 Upper rod 2 Hydraulic jack lever right 3 TC fork 4 Right brace 5 Right tip 6 Pin 7 Right lower rod 8 Right telescopic drawbar 9 Crossbar 10 Left telescopic drawbar TS 11 Left lower rod 12 Left tip 13 Left brace 14 Hydraulic jack lever left 62 Fig
27. using calcium chloride and water mix according to the following table Calcium chloride proportion g l of water Up to 15 C Up to 25 C Up to 35 C Application of such a mix ensures low freezing point increased solution density and safe and efficient ballast A tire should be filled with liquid up to 75 of its volume While filling up with liquid the tire valve should take the highest position The following table provides quantities of liquid to put in Quantity of liquid to put in 14 9 30 420 70R24 ATTENTION Preparing a mix for ballast liquid always add calcium chloride to water and keep stirring until it is completely dissolved Use goggles when preparing a mix In case of the mix contact to eyes rinse the eyes with cold clean water within 5 minutes and call for medical care as soon as possible 20 Rear axle Main gear pair of bevel circle arc toothed gears Final drives pair of straight gears Differential locking mechanism mechanical with manual control for operator s left hand Brakes Main brakes rear wheels twin disc dry hydrostatically driven with suspended pedal Parking brake combined with main brakes with independent mechanical actuator Front driving axle Type portal Main gear bevel circle arc toothed gears Differential Type self locking limited slip Final drives two support reduction gears with bevel gearing Recommended transmission oils Basic e Tap 15
28. 2 Telescopic drawbar 1 Screw 2 Inner tube 3 Outer tube 4 Splined pin 5 Outer tube bore 6 Handle EQUIPMENT ON REQUEST Towing fork 3 fig 1 is used for trailed applications It is installed at guiding sides fixed to the rear axle casing The fork is supplied mounted onto a tractor ATTENTION Dismount towing fork when operating RH as follows unscrew 4 bolts and nuts fixing it to the sides pull the fork out of the guides Hitch platform length adjusting mechanism fig 3 1s used for applications involving machines and tools with platform axle length within 600 870 mm ATTENTION Dismount the towing fork prior to installing the hitch platform length adjusting mechanism 63 In need to work with agricultural machines and tools featuring irregular hitch axle install the mechanism as follows according to fig 3 e Install drawbar split pins onto the grooves Fasten shackle 10 to plate 7 with pin 8 Fasten the fix with a split pin with ring Insert bushing 14 into the shackle eye Push screw 11 through the shackle and bushing Screw thread should be located to the left Machined plate edges should be oriented to the tractor e Push stud 9 into the bushing and screw bores flush with the bushing surface e Put locknuts 13 onto both threaded ends of the screw e Put tips 5 and 12 with jaws onto plate 7 fig 3 Symmetrically take the tips to threaded ends of screw
29. 21 4 are versions of universal cultivating tractor MTZ 922 and have the following distinctive features e Independent fuel tank for 95 located near the left cab footboard Gearbox mechanical with two operation modes synchronized 14x4 at request e Hydraulic system oil pump actuator located to the right from clutch casing e Rear axle differential lock is mechanical with two operation modes 1 Lock 2 Forced lock Locking clutch is splined e Front driving axle featured with two support bevel reducing gears e Rear PTO is mechanically controlled Tractor frame consists of half frame friction clutch casings gearbox and rear axle Diesel engine is rigidly fixed to the friction clutch casing through the rear plate and is mounted onto the front rail with hinged bearing Following powertrain components are located behind the engine e Single disk friction clutch e Mechanical 9 2 gearbox with gear change lever to the right Mechanical multiplier step up gear 1s located between clutch and gearbox to double numbers of forward and rearward gears The multiplier is controlled with a lever at the left operator s hand e Rear PTO with 2 speed independent and synchronous drives PTO is engaged and disengaged with a lever at the night operator s hand e Front driving axle FDA with two support bevel reduction gears has increased load carrying capacity due to bevel roller bearings into the reduction gear pi
30. Flushing rough fuel filter Close fuel tank valve Remove upper filter surface and unscrew four bolts 1 Remove cup 3 Remove filter element 2 screwing it out of the housing Flush all parts with diesel fuel and assemble the filter Open fuel tank valve and fill the system with fuel Operation 39 Replacing filter element of fine fuel filter Unscrew filter 1 from connection pipe 5 at housing 3 Install new filter complete with gasket 2 preliminarily lubricated with motor oil Turn the filter by 34 turn as soon as gasket 2 touches mounting area A at housing 3 Turn the filter by hand only IMPORTANT After filter replacement flush fuel system with manual pump with air bleed plug 4 unscrewed by 2 3 turns Other nonseparable fuel filters with the following parameters may be used Filtering completeness not less than 90 150 I h relative flow at 0 01 MPa pressure drop Diameter 95 105 mm Height 140 160 mm Connection thread 1 6 Sealing gasket outer diameter 70 75 mm To remove air from the system Loosen fine filter cap 1 Unscrew flushing pump handle 3 Ensure fuel tank valve is open and there is fuel 1n the tank Loosen plug 2 at the fuel tank Quickly flush the system with flushing pump until clean fuel with no air bubbles comes out from under the plugs Tighten fuel pump cap 2 Keep flushing the system until fuel with no air bubbles comes out from u
31. Keep the battery fully charged e Use clean winter diesel fuel without water admixture e Fill fuel tanks in the end of each working day to prevent condensation into the tanks Starting procedure 1 Switch off drive of hydraulic system oil pump and compressor to reduce resistance to crankshaft rotation 2 Set multiplier lever to the middle position between ON and OFF positions to aid Start 3 Lift close water cooler blind to quicken engine warm up 4 Check oil level in the engine oil pan and coolant level in the cooler Perform steps 1 to 7 page 6 2 6 As soon as the engine is started and its speed is stable set speed at 1000 RPM to stabilize oil pressure in operating range Release clutch pedal Warm the engine up 7 Check instruments operation Adjust water cooler blind to maintain normal thermal conditions Nn t Back gear for MTZ 821 821 2 39 Getting away and driving the tractor Perform the following to move the tractor 1 Set minimal speed for the engine crankshaft 2 Fully press clutch pedal and wait until all rotating parts stop 3 Shift the gear switch lever from neutral to the most left to operator position and push it forward or pull rearward to engage required range I or II Then return the lever to Neutral position 4 Select required gear according to the gear shifting scheme and engage If it is not possible release clutch pedal lightly and press it again 5 Select and
32. MTZ 821 821 2 821 3 921 921 2 921 3 921 4 OPERATION MANUAL 921 0000010 RE CONTENTS section 1 Introduction International marks eir 4 lt ately re SULA ONS sse sod 6 Section Technical i 19 Section 4 General information Tractor layout and operation 23 SEC MOM D C OME OIG DEDI DES ete ict atte nce cade 25 Section 6 Preparation to work and work order eene eene nennen 38 Section 7 Operation and adjustment eene nennen ener 48 SECON Se RION 60 Section 9 Troubleshooting uti ode iode tue E tue Pec 71 SeGCHOD IO Mante acer gg nas suite a Uv ask ura a ett suot dina dates deat 75 T ET ene re D ee en RT E 100 12 PranspOLf ict onde demum Ee d ret 100 Seccion 135 rebel d ds duenestacsacauenssesdarantadsndadeatacvesasenendentiussutadendadeetadaeiasasnedse tub Reti 101 IMPORTANT In case of tractor being used by a customer or 1s lent or leased prior to starting operating it ensure the o
33. R24 tire W12x24 wheel K mm Other variants are not recommended 49 FDA reduction gear turning angle adjustment Angle of upper pair 3 turn to the neutral position should be equal to 55 1 It is adjusted by screwing bolt 2 in After adjustment lock the bolt 2 with nut 1 to 70 80 Nm aH EET Adjusting rear PTO control mechanism At assembly at the factory or after repair e g after brake band replacement control mechanism should be adjusted as follows 1 Set eccentric axle 15 fig 2 to initial position with flattened surface B vertical and fasten with lock bar 17 and bolt 17 Disconnect rod 4 fig 1 Unscrew bolt 9 to release spring 6 For the sake of safe unit disassembly ensure constant contact between upper Sleeve 7 and bolt 9 while unscrewing the bolt until the spring is completely released Remove the rear axle cap to access screws 13 fig 1 Fix arm 11 neutral inserting M10x10 bolt or 8mm stud 10 into a bore in 10 11 the arm and corresponding hole in the rear axle case Remove lock bar 26 fig 2 tighten screws 21 to 10 kgf 1 kgfm with a wrench or 100mm pliers Then loosen each screw by 2 2 5 turns Remove bolt stud 10 fig 1 holding arm 11 in initial position for adjustment Screw bolt 9 in directing its tip into a recess at the sleeve cap 7 to get A dimension equal to 26 29 mm Shift arm 11
34. TE Check generator belt tension at generator pulley crankshaft pulley fragment with ordinary generator guard Belt sagging should constitute 15 20 mm with 40N force applied to the belt fragment middle Operation 10 Rear wheel hubs Front and rear wheels wheel nuts torque Verify torque and tighten bolts 1 fixing rear wheel hubs four bolts per each hub if necessary with a torque wrench Torque should be equal to 230 330 Nm Verify torque and tighten front and rear wheel nuts to 250 300 Nm if necessary Disk to rim fasteners for rear wheels should be tightened to 160 200 Nm Wheel to hub fixing nuts should be tightened to 200 250 Nm for the front wheels and 300 350 Nm for the rear ones 83 m 3 s Ms j E d NW 9 84 Operation 11 Lubricating FDA reduction gear bearings Lubricate bearings 1 with grease fittings through opening 2 Make 4 5 pressings Operation 12 Servicing air filter Air filter element clogging is controlled with clogging indicator A lamp at the dashboard signals of increased contamination Air filter is serviced as follows e Remove right side front grill and facing to access the air filter e Pull latch 1 yellow turn cap 2 counterclockwise by 12 5 and remove the cap e Remove main filter element 3 e Examine control filter element CFE for contamination without removing it from housing ATTENTION We do not recommend removing control filt
35. V Substitute e TSp 15K TSp 10 TAD 17I Foreign e HESSOL BECHEM HYPOID Drive from transfer box by two cardan shafts with intermediate support FDA control mechanical Operation modes e FDA off e FDA on forcedly e FDA on off automatically PTO drive Type independent two speed synchronous Master clutch planetary reduction gear with band brake PTO control mechanical PTO end rotation speed Independent drive I 540 RPM for PTO at 1631 2081 RPM for engine II 1000 RPM for PTO at 1673 2184 RPM for engine Synchronous drive e 3 90 rotations per path meter with synchronous drive tires 14 9R30 e 4 45 rotations per path meter with synchronous drive tires 420 70R24 PTO end 6 or 8 splined 540 RPM and with 2 splines 1000 RPM Rotation direction clockwise Hydraulic mounted system HMS Type remote cylinder system with hydraulic Jack featuring two actuating hydraulic cylinders built in the rear hitch HMS ensures height power and combined control Hydraulic system outputs two side and two rear outputs rear side output is linked to the rear right output Oil pump Type gear pump delivery discharge rate not less than 45 l min at engine speed of 1800 RPM Hydraulic distributor RP 70 Type running through three sectional four position Actuating cylinder two plunger hydraulic cylinders 080 mm plunger stroke 220 mm Recommended oils for HMS e Motor
36. aking large braking distance e Excessive brake housing heating and other signs of brakes malfunction Adjust if necessary according to instructions of Section 7 Adjustments Operation 28 Cleaning pressure regulator filter To clean the filter e Unscrew bolts 1 and remove cover 2 e Remove the filter rinse it with cleaning solution and blow with compressed air e Replace the filter and the cover tighten bolts 1 Operation 29 Pneumatic system leak test e Pressurize pneumatic system to 6 0 6 5 kgf cm per dashboard air pressure indicator and stop the engine e Observe pressure drop with air pressure indicator Pressure drop should not exceed 2 0 kgf cm after 30 minutes Otherwise locate and repair air leak Operation 30 Rear PTO control check Lever 1 should not require force exceeding 120 150 Nm 12 15 kgf to switch between ON and OFF positions Shifts should be clear If necessary adjust according to regulations of Section 7 Adjustments Operation 31 Cleaning generator Clean generator of dirt and dust Verify and tighten if necessary generator fixing bolts 1 Check state and tension of generator 2 connections Tighten if necessary 91 Operation 32 Replacing filter element in power steering oil tank Turn and remove side grill at front facing to access the oil tank e Unscrew bolts 1 remove cover 2 and filter element assembly e Install new filter element i
37. ange section 4 pneumatic system pressure indicator with pressure alarm light Indicator scale has three sections e Operating pressure 500 kPa to 800 kPa green e Not operating pressure two o kPa to 500 kPa and 800 kPa to 1000 kPa red 5 Voltage indicator Shows battery voltage with stopped engine and with starter key in position I with running engine the indicator shows voltage at generator terminals Voltage indicator scale has the following sections With running With stopped pe aa green mode 10 0 12 0V Generator will Discharged 12 0 13 0V No AB charging Normal battery yellow low charging charging voltage red battery dorsi fee yellow section voltage 12 7 V Tacho speedometer Electric tacho speedometer at the dashboard operates as follows e After stopping the tractor and turning starter and indicators switch key to position I display 7 shows engine working hours 5 e After starting the engine the pointer 8 goes round the scale 1 to indicate engine crankshaft rotation speed The display 4 shows PTO rotation speed RPM Scale 3 is for PTO I and scale 2 1s for PTO II Electric signal of rotation speed is fed from generator phase winding 31 e In motion display 7 indicates 6 tractor speed km h indication 5 disappears Speed electric signal is fed from speed sensors on the rear axle caps ADARA ve Engine cranksha
38. arances at cold engine e Disassemble cylinder head cover e Verify and if necessary tighten bolts and nuts fastening rocker arm shaft brackets to 60 90 Nm 6 9 kgf m e Rotate crankshaft clockwise until 1 cylinder valves overlap exhaust valve starts to open inlet valve completes closing e Verify and adjust if necessary clearances in valves 4 6 7 and 8 valves are numbered in direction from the fan For clearances for inlet and exhaust valves see Section 3 Technical specifications e Rotate crankshaft by 360 until 4 cylinder valves overlap and adjust clearances of valves 1 2 and 5 e Tighten screw locknuts and replace disassemble parts Operation 25 Replacing PFE filter of RH hydraulics NOTE In the following hydraulic system PFE Remove screws 1 and remove cover 2 Remove housing 4 with PFE 3 Rinse housing 4 with cleaning solution Install new PFE complete with housing 4 into the tank of hydraulic system e Replace cover 2 and fasten with bolts 1 Operation 26 Free travel of steering wheel Steering wheel free travel should not exceed 25 with running engine Otherwise eliminate play in steering ball joints tighten pivot arm nuts eliminate play in steering column and steering linkage 90 Operation 27 Brakes check and adjustment Check and adjust brake pedal in operation in case of e Nonsimultaneous braking of left and right wheels e Ineffective wheel br
39. block is located under a cover 28 page 5 1 Five fuses protect the following circuits from overload 1 Cab lamp 7 5 A 2 Rear screen washer and wiper 7 5 A 3 Two pairs of rear operating lights 15 A 4 Headlamps 25 A 5 Venting and heating system 25 A 6 Beacon 15 A Upper beam control light blue Rear axle differential lock control light orange EFP control light not used Reserve red _ Brake fluid level control light red 29 Two fuse blocks for BP 1 and BP 2 circuits are mounted under the dashboard Unscrew bolt A under the steering column and remove casing B to access fuses Twelve fuses protect the following electric circuits from overload 1 Road lights upper beam 25 A 1 Instruments feeding 7 5 A 2 Horn 15 A 2 Turn indicators breaker 7 5 A 3 Portable lamp socket 25 A 3 Right road light lower beam 7 5 A 4 Alarm lights 15 A 4 Left road light lower beam 7 5 A 5 Stop light 15 A 5 Right side lights instruments lighting 6 Windscreen washer and wiper 15 A 15 A 6 Left side lights 7 5 A WARNING Never use fuses of higher rated current to prevent electric wires burn Frequent fuse burning requires fault investigation and elimination 34 Connected electrics A standard multipurpose socket is provided for connecting current consumers of a trailer or towed agricultural machines It is located behind the rear cab panel The socket is connected
40. brake fluids are recommended for use Level sensor 2 is installed on the cylinder cap to control brake fluid level in main brake cylinder tanks WARNING Filling with or adding other fluids may disturb operation of clutch and brakes control hydraulic actuators Operation 7 Tire pressure check Check cold tire pressure and examine tire tread for damages If necessary make front and rear tire pressure consistent with regulation of Section 3 Technical specifications 82 Maintenance No l TM 1 each 125 operating hours Includes operations of the maintenance and the following previous Operation 8 Removing sediments from fuel tank and rough fuel filter Unscrew discharge caps 1 of the fuel tank 2 and filter 3 and remove sediments until clean fuel starts to discharge Gather the sediments into a suitable container for used oils and liquids Tighten discharge caps after clean fuel with no water or dirt start to flow Operation 9 Engine cooling fan belt tension check Examine the belt for wear or damage Replace if necessary To check generator belt tension at an engine with elongated guard apply approximately 40N to the middle of generator pulley water pump pulley belt fragment 1 Sagging should constitute 6 10 mm If necessary turn generator housing to adjust the belt tension with previously loosened and then tightened plate fixing bolts and nuts of generator fixing bolts NO
41. c drive 1 Compressor 2 Pressure regulator 3 Air bleed valve 4 Tank 5 Alarm pressure signaling light 6 Pressure indicator 7 Pressure cell 8 Alarm pressure cell 9 Condensate discharge valve 10 Coupling head 11 Control line 12 Brake valve Tract is equipped with pneumatic system to control brakes of trailers and other towed machines with air brakes The system is as well used to pump up tires and for other applications requiring pressurized air energy Air is taken into the system from the engine s intake manifold Compressor 1 compresses and passes air to the tank 4 through pressure regulator 2 keeping required pressure in the tank Compressed air passes from the tank to the brake valve 12 via the piping From the brake valve the air passes via control line 11 to the coupling head 10 and farther to the trailer s air system Pressure regulator is equipped with air bleed valve 3 used to pump up tires and for other applications There is a pressure cell 7 and alarm pressure cell 8 to control air pressure in the system Dashboard features pressure indicator 6 and red alarm light 5 Valve 9 is provided to remove condensate from the tank 43 Double line pneumatic drive Tractors may have double line pneumatic drives to control air brakes of trailers 43 The system is as well used to pump up tires and for other applications requiring pressu
42. ctor powertrain may be badly damaged 7 Operation at 9 gear is allowed in overdrive only range II 8 Tractor cab is equipped with a single seat and only operator is allowed to stay into 9 Certain tractor components are placed into SPS case toolbox or cab at dispatch from the factory These should be installed by the user himself 10 When commissioning new batteries remove sealing film from vents or cut afflux out of polyethylene plugs 11 Do not allow tractor operation with friction clutch engaged or not completely disengaged 12 To start moving ensure hand parking reserve brake disengaged 13 Set FDA switch knob to driven position in order to operate the tractor with no cardan shafts 14 Never operate tractor in closed compartments with insufficient ventilation air exchange exhaust gases may be fatal 15 Never tow tractor with front wheel lifted up otherwise FDA drive may fail leading to emergency conditions 16 Never lift machine front up with a towing shackle Use the shackle to tow the tractor only 17 Never perform maintenance or other works in fan or drive belt area with running engine 18 Manufacturer never stops improving the machine thus machine structure or operation rules may be subject to alterations not reflected in the present manual Section 1 INTRODUCTION INTERNATIONAL MARKS The present manual contains basic technical data description of structure features controls operation and maintenance for the follo
43. cylinder brackets and pins e Sleeves FDA casing e Adjustable brace cover fixing bolts Not shown at lubrication diagram e TCY 3B towing fork plates fastening bolts and nuts 96 97 e Towing coupler and hydraulic jack guide brackets fixing bolts and nuts Operation 43 Turbocompressor MTZ 821 2 821 3 921 921 2 921 3 921 4 e Disassemble turbocompressor assembly and dip it into a diesel fuel bath for two hours e Blow turbocompressor with dry compressed air and reinstall Operation 44 Transmission oil change e Warm transmission up prior to changing oil e Place tractor on a plain ground lower the tool and stop the engine e Engage parking brake and use shims to prevent wheel move e Unscrew drain plugs 1 from the gearbox and rear axle casing and filler cap see Lubrication diagram pos 44 Drain oil to a special container for use oil Dispose of used oil in proper way ATTENTION Be careful to avoid contact to hot oil Reinstall drain plugs and add fresh oil to the transmission Operation 45 Flushing engine oil prefilter e Loosen four clamps at connection sleeves and remove filter 1 from oil line in front of engine oil cooler AIMPORTANT Note filter positioning in the oil line Random installation is not allowed e Rinse the filter with diesel fuel and blow with compressed air in direction of an arrow at the filter housing e Install the filter considering correct posit
44. d 18 into actuating cylinder bubbles in discharged brake fluid 19 piston to stop turn fork 16 to align 5 Remove the hose and put protective cap bores in arm 14 and the fork Screw 20 on fork 16 in by 5 5 5 turns 6 7 mm and 6 Check brake fluid level in tank 2 and add connect to the arm with pin 15 if necessary 5 Tighten locknut 17 cotter pin 15 and put backward spring 23 on ATTENTION Keep brake fluid level in tank 2 between MIN and MAX marks while Flushing clutch control hydraulic system flushing the system 1 Fill tank 2 with brake fluid to MAX mark Having verified clutch control adjustment Remove protective cap 20 and put rubber check clutch engagement fineness as follows hose onto bypass valve 21 head Put the 1 Start the engine and set its speed at other end of the hose into a reservoir with 1400x100 RPM brake fluid 2 Engage parking brake 2 Press clutch pedal several times Holding it 3 Fully press friction clutch pedal and in pressed unscrew bypass valve 21 by a 5 seconds not less engage gears quarter turn to discharge excessive brake Engagement should be fine with no fluid with air bubbles into a reservoir with unwanted sounds otherwise repeat brake fluid adjustment check 53 Adjusting main brakes IMPORTANT Adjust working pressure with parking brake rod and pneumatic valve rod disconnected Adjust working brakes as follows 1 Loosen locknuts 2 and set left and r
45. d indicators switch 1 Has four positions e O OFP e I Indicators and control lights block ON Oil pressure alarm lights at engine oil pressure indicator 16 page 5 1 and alarm buzzer sounds e II Starter ON non fixed position Control light and alarm buzzer go off after engine 1s started e III Radio feeding Turn the key counterclockwise Remote AB switch 2 The switch is on with button 2 pressed Repeated pressing switched the battery off Central light switch 3 Has three positions e I OFF right part of the key is recessed e Front and rear sidelights license plate lighting dashboard instruments lighting and additional lights at trailed machine are ON middle position e III All consumers od position and road lights are ON left part of the key is recessed Understeering switch left 1 Allows switching on turn indicators switching between upper lower beam of headlamps upper beam signaling horn activation Turn indicators are switched by moving the arm forward rearward Lower upper beam of headlamps To light headlamps on set the central light switch 1 to position HI see above and set the switching arm to the middle position Lower Beam Upper beam is activated with pushing the switching arm to stop Arm positions for upper and lower beams are fixed To blink with upper beam pull the arm to stop from Lower Beam position regardless the light
46. e Upper position of lever 4 parking brake ON e Lower position of lever 4 parking brake OFF To disengage the parking brake press button 3 of the control arm and press the lever fully down Two speed independent PTO drive switch Independent PTO drive lever 2 has two positions e 540 RPM fully clockwise down view e 1000 RPM fully counterclockwise To set required PTO end rotation speed loosen bolt 1 turn the lever 2 to I or II position and tighten the bolt 1 SM c gt I Turning rear PTO on and off Rear PTO 15 controlled with a lever 3 with two positions e PTO ON utmost rear position e PTO OFF utmost forward position Compressor control The handle 4 has two positions e Compressor ON turn the knob by 180 to orient an arrow at the knob against tractor driving direction e Compressor OFF turn the knob by 180 to orient an arrow at the knob along tractor driving direction 28 ATTENTION Switch the compressor with engine stopped or low idling FDA drive control PMV drive transfer box control arm 1 has three fixed positions e FDA OFF upper position Used for driving hard roads e FDA ON OFF automatically middle position FDA is automatically switched on and off by freewheeling clutch depending on rear wheels slippage Used for various field works e FDA ON forcedly lower position Used briefly for per
47. e left side of gearbox casing D 243 S for MTZ 821 2 D 245 43S2 for MTZ 821 3 D 245 5 FOR MTZ 921 D 245 5S for MTZ 921 2 D 245 5S2 for MTZ 921 3 D245 583A for MTZ 921 4 10 Friction clutch number on the left side of clutch casing Front driving axle number on the left front side of FDA casing Transmission number to the right from rear view at connection to gearbox 11 Diesel engine D 245 4382 D 245 5 D 245 5S MTZ 821 3 245 582 245 5S3AM D 243 Model MTZ 4 tact 1n line 4 tact 4 tact in line turbocharger naturally aspirated in line in line intercooler turbocharger turbocharg Number of cylinders 4 pes Direct fuel injection mode Compression ratio 16 1 171 151 171 estimated 110 Type Cylinder diameter mm Piston stroke 125 mm splacement 4 75 sequence system rpm Max speed m 2380 2070 1980 2070 rpm ee power kW Max torque 411 at 1400 298 at 1400 RPM RPM 397 at 1000 RPM 464 at 1400 RPM Lash between inlet outlet valve and rocker at cold engine mm Fuel injection ls me fs UDP deg Fuel injection pressure 21 6 22 4 23 5 24 7 21 6 22 4 23 5 24 7 MPa With fuel injection pump Motorpal With fuel injection pump Yazda 0 20 0 35 0 15 0 30 0 20 0 35 0 35 0 50 Diesel engine feed system Fuel pump 4 plunger in line with boost pump Regulator mechanical all
48. ed 2 5 m in width and 3 8 m in height to have access to public roads otherwise is should be agreed with road police Vehicle s load capacity depends on land relief road slope and condition Overall semitrailer trailer weight should not exceed 6000 kg considering permissible longitudinal slope in 12 The tractor is provided with combined multipin socket with coupled machine equipment feeding jack according to GOST and ISO standard 69 Driving speed selection Vehicle s driving speed may be limited by the coupled machine possibilities according to a sign applied Choosing driving speed the operator should consider driving intensity state and features of coupled machines and carried load road and weather conditions tractor s abilities and limitations by traffic regulations and working processes Operator should reduce speed or stop in front of any obstacle to ensure safety Tractor Tractor packaging _ Speed km h Working on slopes EE TMA in sharp turns i Actuation through 8 max synchronous PTO Transporting TMA to operation site save for 15 max On public roads vehicles Transport works TCV l5max Machine speed may be limited by the coupled machine abilities according to a sign applied cu 120 70 Section 9 TROUBLESHOOTING FAULT SYMPTOMS REMEDY ENGINE Engine will not start Flush the system with manual pump Eliminate air inflow if
49. embly Adjust free travel of the pedal Replace collar MAIN DRIVE Increase noise in conical pair Adjust gear engagement and bearing gaps differential bearings engagement Ineffective braking brakes do not hold Incorrect brakes control adjustment Adjust brakes control Oiled or worn brake disk pads Remove oil leaks Replace disks 1f necessary REAR PTO Rear PTO shall not transfer full torque slips Misadjusted control mechanism due to badly Adjust PTO control mechanisms worn brake band friction pads or otherwise Unclear PTO control arm shifting jams rests Eliminate impediments to free control dirt etc in mechanism connections mechanism parts moving Control arm should be clearly fixed in PTO ON and PTO OFF positions FRONT DRIVING AXLE Front axle is not automatically activated with slipping rear wheels during tractor move forward Worn free wheeling clutch parts Replace free wheeling clutch Jamming grooves at free wheeling clutch outer Disassemble the clutch and wash its parts ring are contaminated with oil oxidation or part wear products Deformed springs at roller cushion mechanism Replace springs Transfer box control rod is too long Adjust rod length according to Section 7 Adjustments Not for MTZ 921 3 with D245 5S2 engine 72 FAULT SYMPTOMS REMEDY Front tires are quickly worn or ply separated Front and rear tire pressure does not correspond Keep front and rear tire pressure consistent wit
50. er element from the housing Contaminated control filter element indicates damage to the main filter element MFE broken paper blind unstuck bottom plate It such a case rinse CFE and replace MFE e Blow the main filter element with compressed air inside and outside to completely remove dust Air pressure should not exceed 0 2 0 3 MPa 2 3 kgf cm to avoid paper blind breakage e Direct air flow angularly to the filter element surface Avoid damaging and oiling filter element while servicing e Wash oiled or contaminated filter elements that cannot be cleaned with compressed air with OP 7 or OP IO soapy paste water solution at temperature of 40 50 C e The solution should be prepared from 20g of paste per 11 of water Missing paste may be replaced with domestic powder detergent with the same concentration 85 e Wash the element by dipping into the cleaning solution for half hour Then rinse the element with the same solution within 15 minutes and with clean water at 35 45 C dry within 24 hours Never use open fire and air hotter than 70 C to dry the filter element out e Assemble the air filter in reverse order NOTE Check state every 20 operating hours in dusty conditions Operation 13 Clutch shifter bearing lubrication e Remove plug 1 at the left side of clutch housing e Insert a tip of piston gun into the hole to get full contact with the grease fitting and make 4 6 pressings of Li
51. fix required multiplier lever position 6 Engage parking brake and smoothly release clutch pedal increasing fuel supply lightly Keep it increasing as motion begins IMPORTANT Avoid starting with heavy traction load e g plough deepened in soil IMPORTANT Always press clutch pedal prior to engaging range and gear in the gearbox Do not keep your leg on the clutch pedal while operating the tractor as it leads to clutch slip overheating and breakdown Steering IMPORTANT Tractors are equipped with hydrostatic power steering Pump does not feed the system with the engine stopped and the system automatically switches to manual mode requiring much effort to turn steering wheel Stopping the tractor Act as follows to stop the tractor e Reduce engine crankshaft rotation speed e Fully press clutch pedal e Shift gearbox switch lever to Neutral position e Release clutch pedal e Press working brakes pedals to stop the tractor Never stop the tractor with brakes with engaged clutch e Engage parking brake ATTENTION For emergency tractor stop press simultaneously clutch pedal and both working brakes pedals Stopping the engine Act as follows to stop the engine e Let the engine run at low speed after releasing load to cool down It is preferable not to stop hot engine e Set minimal idle speed by pulling the fuel supply control handle down e Stop the engine by pulling a stop handle to Sto
52. forming works on loose or wet soils and if necessary at backing IMPORTANT Set lever 1 to FDA ON forcedly position to operate tractor without cardan shafts RH jack control Hydraulic jack is controlled with two arms 5 6 at the right board for the right operator s hand Force adjustment handle is located closer to the operator and has the following positions e Most forward maximal tillage depth e Most rearward minimal tillage depth Positioning adjustment 5 handle has the following positions e Most forward minimal tool height over the ground surface e Most rearward transporting position Hydraulic system distributor control Each of three levers 2 3 4 controls external cylinders and has four positions e Neutral upper middle position fixed e Lifting Up upper non fixed position Released handle returns to Neutral lever 4 has fixed Lifting Up position e Forced Lifting Down lower middle non fixed position between Floating and Neutral positions Released handle automatically returns to Neutral e Floating lower fixed position fe H Floating Tr Lu NOTE Handles 5 6 allow combined adjustment with tilting depth limited by handle 5 and control by handle 6 IMPORTANT Hydraulic jack cannot be controlled with arms 5 6 with any of handles 2 3 4 in Lifting Up or Lifting Down position Indicators and switches Starter an
53. ft rotation speed scale RPM PTO II rotation speed scale 1000 RPM PTO I rotation speed scale 540 RPM PTO rotation speed indicating display Engine working hours indication h Tractor speed km h Engine working hours speed indication display Engine crankshaft rotation needle indicator and tractor speed Board with cab venting and heating system front and rear operating lights rear screen washer and wiper switching keys Cab venting and heating system switch 1 Is used to switch venting and heating system fan on The switch has three positions e OFF e Low speed ON light air feed e High speed ON heavy air feed Front operating lights switch 2 Press the key to light front operating lights on The key light will on First pair of rear operating lights switch 3 Press the key to light the first pair of rear operating lights on The key light will on Second pair of rear operating lights switch 4 Press the key to light the second pair of rear operating lights on The key light will on Rear screen washer and wiper switch 5 The switch has three positions e OFF e Screen wiper ON fixed position e Screen wiper and washer ON non fixed position Plugs 6 For additional switches 32 Control lights block Tractor turn control light green Trailer turn control light green Hand brake control light red Steering booster oil pressure alarm light red Fuses A fuse
54. h to recommended recommended to prevent malfunctions Misadjusted wheel toe in Adjust FDA is constantly activated due to breakdown Check forced FDA activation operation Correct or jamming in transfer box control malfunction Adjust transfer box control mechanism Adjust Replace disks Replace springs HYDROSTATIC POWER STEERING Increase effort on steering wheel Insufficient oil pressure in power steering Send feeding pump for repair or replace hydraulic system Faulty feeding pump Insufficient oil 1n oil tank Add oil to the level Excessive friction between mechanical parts of Repair steering column No thrust at steering wheel turning Spontaneous steering wheel turning motoring with no operator s action Dosing pump slide valve shall not return to neutral position a splined end of steering column shaft jams in Adjust steering column dosing pump driving shaft b excessive friction between mechanical parts Repair of steering column Guide wheels turn does not correspond to the steering wheel rotation direction Incorrect dosing pump cylinder outputs Change connection connection to the turning cylinder HYDRAULIC HITCH Hitch platform does not lift up or its load 1 Insufficient oil in the tank add oil to the capacity is drastically reduced Pump squeals tank to correct level with one of external distributor handles set to 2 Air intake to the pump suction line Lift Up position Oil is generally ove
55. h fuel to remove air Check fan belt tension Check and adjust tire pressure Service the battery Tighten fasteners Squirt all lubrication points Check and if necessary adjust front wheels toe in WARNING Ensure all protective guards are in place prior to start the engine in order to avoid personal injury ATTENTION NEVER start new unbroken in engine by towing to avoid excessive engine parts wear Breaking in Your new tractor shall show safe and long term operation in case of performing correct breaking in and necessary maintenance works in due time Observe following when performing 30 hours breaking in e Constantly observe indicators information lubrication cooling and feeding systems operation Observe oil and liquid levels in refill capacities e Check tightening and retighten external fixing connections e Break in the engine at easy transporting and field works harrowing cultivation sowing etc gradually increasing load at different gears e not overload the engine do not allow fuming or speed reduction Signs of overload are following sharp speed reduction engine fuming and ignorance to increased fuel supply e Tractor operation at too low gear with little load at high engine speed causes fuel overconsumption Correctly chosen gear for each given operation condition allows fuel saving and reduced engine wear e Regularly perform monthly maintenance according to recommendat
56. haft speed 1800 RPM GB 9 2 multiplier rear tires 14 9R30 MTZ 821 3 921 921 2 921 3 921 4 6 8 10 12 14 16 18 20 22 24 26 28 PT di B 921 KM H 2 8 4 10 12 14 16 18 20 22 24 26 28 Estimated tractor speeds in km h at rated diesel engine crankshaft speed 1800 RPM GB 9 2 multiplier rear tires 420 70R24 MTZ 821 3 921 921 2 921 3 921 4 KM H 10 12 14 15 18 20 22 24 26 25 Ge Estimated tractor speeds in km h at rated diesel engine crankshaft speed 2200 RPM GB 9 2 back gear rear tires 14 9R30 MTZ 821 821 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 He j j 1 ET S 2 TL IL ooo ale Ex KM H 6 8 10 12 14 16 18 20 22 24 26 28 30 Estimated tractor speeds in km h at rated diesel engine crankshaft speed 2200 RPM GB 9 2 back gear rear tires 420 70R24 MTZ 821 821 2 KM H 2 4 amp 8 1 12 14 16 18 20 22 24 26 TELE v ON IMPORTANT 1 Never exceed tire pressure recommended by the manufacturer 2 Do not perform welding or other repair works on a disk with pressurized tire Contact workshops with specially trained personnel to dismount and repair tires Table of permissible tire load changes relative to tractor speed Permissible load change Max permissible 38206 IMPORTANT Use appropriate front and rear tires Correctly chosen front and rear tires ensure max
57. he most left position with flattened surface B placed vertically to the left indicating used external adjustment reserve In that case set eccentric axle to initial position turning it counterclockwise flattened surface vertically to the right Then perform adjustment as describe above during assembly at the factory or after repair to PTO In other cases it 1s preferably to correct fault by changing rod length and basic adjustment 51 d Fig 2 Planetary reduction gear of rear PTO Drive switching clutch 2 Crown gear shaft 3 Nut 4 Carrier 5 Sun gear 6 Satellite 7 Crown gear 8 Satellite axle 9 Brake drum 10 PTO 11 13 Brake band 12 Switching drum 14 Rear cover 15 Eccentric axle 16 Lock bar fixing bolt 17 Lock 18 Removable end 19 Lock bar of removable plate 20 End fixing bolt 21 Adjusting screws 22 24 Arm 23 Spring unit 25 Control roller 26 Adjusting screw lock bar Clutch drive Clutch drive is used to control friction clutch It is of hydrostatic type with suspended pedal Drive consists of the main cylinder 1 fig 3 suspended pedal 9 elbow 12 actuating cylinder 19 arm 14 tank 2 piping 11 flexible sleeve 13 bracket 22 and backward springs 3 23 Pressing pedal 9 makes brake fluid pass from the main cylinder 1 via piping 11 elbow 12 and flexible s
58. ight brake pedal 3 5 pads coplanar with stop bolts 1 so as to allow easy pedal junction with junction plate 4 Tighten locknuts 2 2 Adjust free travel of the right brake pedal clearance between piston and piston tappet of the main cylinder for the right brake with fork 7 as follows e oosen locknut 6 uncotter and remove pin 8 e Turn fork 7 to ensure free travel of the pedal from initial position to the moment of the tappet contact to the piston measured at the pedal pad center equal to 4 8 mm e Connect fork 7 to the brake pedal with pin 8 tighten locknut 6 and cotter the pin 3 Repeat above operations for the left brake pedal 5 4 Flush brake actuating hydraulic system as follows e Fill tanks 14 with recommended brake fluid to MAX mark or to the level of 15 5 mm to the upper edge of the tank e Remove dust and dirt from valves 12 remove caps from the valves and put hoses onto actuating cylinder valve heads Put the other ends of the hoses into transparent containers half full of brake fluid e Interconnect pedals with junction plate 4 e Unscrew valves 12 of the left and right actuating cylinders 11 by 1 2 3 4 turn press brake pedals several times and tighten valves of the both cylinders holding the pedals pressed Release pedals press quickly release smoothly e Flush the system until there are no more bubbles leaving the hose put into container with brake fluid
59. il resistance e Combined adjustment tillage depth adjustment in relation to soil resistance with maximal tillage depth limited by positioning adjustment Positioning adjustment handle 2 is used to control hanging platform with coupled tool Positioning adjustment Force adjustment handle 1 should be set to the front position 9 figure at the board when connecting a tool It allows accurate and delicate control over connected rigs over the ground like spraying machine leveler etc Positioning adjustment may be applied with tillers at plain fields Using positioning adjustment at uneven surfaces is limited due to inevitable vertical movements of the tool while tractor driving the field 1 Set force adjustment handle 1 to extreme front position along the driving direction 9 figure at the board 2 Set required machine elevation over the ground with positioning adjustment handle 2 1 figure at the board corresponds to transporting position of RH and 9 figure corresponds to minimal tool elevation over the ground 47 Section 7 OPERATION AND ADJUSTMENT REGULATIONS Setting front track Front track of the tractor may be altered with exchanging left and right wheels only Front track is equal to 1220 and 1365 mm To adjust the track 1 Engage parking brake Put blocks on both sides of rear wheels 2 Jack the front axle up or front wheels alternately to ensure clearance betwee
60. imal performance elongate tires service life and reduce powertrain components wear Combination of worn and new tires or tires with different diameters or rolling radiuses may result in kinematic discrepancy and excessive tire wear Tire combinations _ 420 70R24 00 J Z J Permissible loads on tractor tires 1n relation to tire pressure Tire Load on tire N kgf at internal pressure kPa kgf cm7 at 30 km h 80 100 120 140 160 180 200 0 8 1 0 1 2 1 4 1 6 1 8 2 0 4900 5586 6272 6958 7644 8330 9015 20917016 500 570 640 710 C80 850 0920 12 AL 16 5684 6566 7234 7939 8673 9359 9996 580 670 740 810 885 955 1020 14700 15729 17297 18865 19943 20 70R2 1500 1605 1765 1925 2035 14 9 30 13328 14798 16317 17689 19110 1360 1510 1665 1805 1950 To get optimal operational parameters set tire pressure within ranges from minimal to maximal in relation to actual loads acting on tires and speed according to tables For machines requiring dig tractive effort set pressure as for 30 km h Increase tire pressure by 25 19 Ballast liquid Additional wheel loading by filling wheel tubes with liquid is applied in case of insufficient wheel traction to the ground in adverse conditions overwet soils etc Note it 1s preferably not to ballast from wheels as it affects tractor steerability In cold weather we recommend
61. ine oil filter e Remove nut 1 and cap 2 e Lift rotor 3 up to stop to insert screw driver 5 to prevent rotor rotation Rotate rotor nut with wrench 4 to remove rotor housing 3 e Remove cover 6 impeller 7 and filter mesh 8 e Clean all parts of sediments wash them with diesel fuel and blow with compressed alr e Align balancing marks at rotor cup and housing to assemble the rotor Tighten the nut fixing the cup with little force to completely settle the cup into the rotor Ensure free rotation of the rotor e Replace filter cap tighten cap nut to 35 40 Nm 3 5 40 kgf m ATTENTION Engine filter operates properly if sound of rotating rotor can be heard from under the filter cap within 30 60 seconds after warm engine stop Operation 23 Engine oil change e Place the tractor on a plain ground Engage parking brake e Warm the engine up to normal operating temperature not less than 70 C e Remove cap 2 from filler neck 1 e Remove drain plug 4 from the engine oil pan and discharge oil to appropriate container for used oil e Replace drain plug 4 e Fill the oil pan with oil recommended by the present manual see Table of lubricants e Check oil level with dipstick 3 e Replace oil filler cap start and run the engine within 1 2 minutes Add oil to required level if necessary 89 Operation 24 Engine valve clearances ATTENTION Verify and adjust cle
62. ing Hitch platform axle may be equipped with a crossbar for agricultural machines with TCY 1 fork Using PTO requires cardan shaft of 1000mm rated length so that machine coupling point in relation to the crossbar is in the cardan shaft center Otherwise PTO drive would be overloaded TCY 3B fork is used for trailers The tractor has 4 pairs of free hydraulic outputs right side 1s connected to the right rear one to service coupled machinery with included high pressure sleeves Outputs ensure not less than 45 l min oil flow rate depending on hydraulic pump technical state Oil takeoff by hydraulic cylinders 60 of the coupled machine should not exceed 16 1 check oil level in hydraulic tank with working cylinder rods retracted Locking and interrupting devices enveloping half couplings and interrupters included into SPS are provided to prevent oil loss during machinery coupling or at unpredictable disconnection Power may be hydrostatically taken off through an output see Section 5 Controls and instruments handle 4 at p 5 6 with fixed Lifting Up position to actuate auxiliary hydraulic motors Working pressure should not exceed 11 MPa to avoid hydraulic system overheating Use separate line to discharge oil from hydraulic motor bypassing the distributor The tractor is equipped with fittings with phantom flow section Duz12mm and 20 1 5 thread Use appropriate adapters with phantom flow section of not less than Du 12mm in o
63. ioning in the oil line e Tighten clamp bolts 98 Operation 46 Changing oil wheel reduction gear housings main drive and intermediate bearing of FDA cardan drive e Run the tractor and warm oil in FDA housings up e Place the tractor on a plain ground Stop the engine Engage parking brake and block the wheel with shims of both sides e Unscrew inspection and filler plugs 1 from wheel reduction gears main gear upper conical pair and intermediate bearing e Unscrew drain plugs 2 of the main gear upper conical pair reduction gears and intermediate bearing Drain oil into a special container and dispose of in a due manner e Reinstall and tighten drain plugs e Fill housings with fresh transmission oil to the lower edges of inspection and filler openings e Reinstall and tighten inspection and filler plugs Operation 47 Hydraulic system tank oil change Warm hydraulic system oil up prior to changing Place the tractor on a plain ground stop the engine and retract hydraulic cylinder rods Change oil as follows e Remove filler cap 1 and drain plug 3 from hydraulic system tank and drain oil into a container for used oil Dispose of the oil in a suitable manner e Reinstall drain plug 3 and fill in new oil according to lubrication diagram and table of lubricants e Check oil level with oil meter 2 The level should be between and P marks e Reinstall filler cap 1
64. ions of present manual e Perform maintenance operations after breaking in see page 10 2 38 Starting the engine Starting in normal conditions Check oil level in engine oil pan and coolant level in radiator check for fuel in the tank IMPORTANT Never start engine with empty cooling system IMPORTANT Stay at operator s seat when starting the engine and controlling instruments 1 Brake the tractor with parking brake 2 Set gear switch lever to neutral position and multiplier arm to any of two fixed positions ON or OFF 3 Set PTO lever to OFF position 4 Turn remote battery switch on 5 Set fuel supply lever to the muddle position 6 Press clutch pedal shift gear switch lever to the most left position pull and keep it there 7 Turn starter switch key to position II Start and keep it until the engine 1s started but not more than 15 s Starting control light shall on at control lights block and off after engine start Repeat starting not sooner than in 30 40 s after the first unsuccessful in any attempt 8 After engine start 1 Release clutch pedal and gear switch lever 2 Check operation of all indicator lights and indicator readings coolant temperature engine oil pressure battery charge Back gear for MTZ 821 821 2 Starting at low temperature 5 C and below IMPORTANT Never push or tow the tractor to start the engine by towing to avoid damage to powertrain e
65. ired operational equipment to connect the machine appropriate PTO end type and dimensions hoses cutoff clutches etc Order and purchase equipment for additional charge if required Check possibility of tractor driving within TMA assess steerability and cross country ability Check possibility of tractor driving at required by application speeds Check possibility of common operation in transport and operating state of tractor and machine The tractor may be coupled with machines of 1 4 drawbar category and of class 2 wheeled tractor s set Besides machines of class 0 9 tractor s set may be used in harsh conditions or at heavy soils Hitches and towing devices PTOs and hydraulic outputs are internationally standardized allowing connection of foreign machines Tool coverage and tillage depth generally depend on specific soil resistance that determines working speed diagnosis considering agricultural requirements The heavier soil the higher specific resistance Technical appliance Specific resistance Possible coverage kN kgf M Ploughs Souls heavy 18 25 1800 2500 medium 12 14 1200 1400 light 6 8 600 800 Disk harrows 1 6 2 1 160 210 Share scufflers 6 0 10 0 600 1000 Cultivators 1 6 3 0 160 300 Seeding machines 1 2 1 8 120 180 Harvesters 1 2 1 5 120 150 Combines clippers 2 6 3 3 260 330 Potato combines 10 12 1000 1200 Two bores for self tapping screws may be drilled inside the cab side
66. irfilter S p 13 Shifter bearings J J 14 Battery tf 15 Cab venting and heating filter l o J Y Front wheels toe in JoJo oe e o front driving axle UBGP Steering hydraulic cylinder ball joints _ T Steering rod ball joints o o 20 Clutch pedal free travel adjustment J D Turbocompressor JJ 22 Centrifugal oil filter 23 Engneol S j jJ i S Maintenance No 2 TM 2 after 500 operating hours 24 Engine valve gaps J 25 RHhydrauicsystemfilters Jo o J J 26 Steering wheel J 27 Brakes tt 28 Pressureregulatorfilter 29 Pneumatic systemleaks o o 30 PTO contro tt 31 Generator S o 32 Filter element in power steering oiltank _ 33 Fine fuel filter oo l _ j ___ _34 Transmission oil level check o o 35 FDA casings oil evel check J 36 FDA reduction gear axis bearing clearances 16 17 13 19 UJ Perform maintenance operations after 250 hours Not shown at lubrication layout MTZ 821 3 921 921 2 921 3 921 4 78 Table continued Po Mats ct Ra add replace Maintenance No 3 TM 3 after 1000 operati
67. ited 42 Remove filter mesh from fuel tank filler neck to avoid fuel spillover when fueling the machine up mechanically The filter mesh is provided for manual fueling the tractor up in the field only 43 Charge the tractor with oils and grease recommended by the manufacturer only Application of other lubricants IS STRICTLY PROHIBITED Safety regulations for electrics operation and maintenance 44 Adhere the following safety regulations to prevent damage to semiconductor devices and resistors e Never disconnect battery terminals with running engine that would cause voltage crest in charging circuit and damage to electric devices e Never disconnect electric wires prior to stopping the engine and turning all electric switches off e Observe polarity when connecting wires to the battery Incorrect connection shall lead to short circuit and damage to electric systems 7 e Do not connect AB to electric system until terminals and voltage polarity is verified e Never check for current with a spark method that causes damage to electrical equipment and fuses and wiring burn out IMPORTANT Do not turn starter and instrument switch prior to full engine stop e not operate the tractor without battery installed in electric system Fire safety regulations 45 The tractor should be equipped with fire fighting equipment particularly with spade and fire extinguisher Operating tractor with no fire fighti
68. leeve 13 to actuating cylinder 19 moving rod 18 Rod 18 turns arm 14 connected to the friction clutch shifter through the shaft disconnecting engine and transmission Brake fluid Neva M TU 2451 053 37632629 2003 15 used as working fluid in clutch actuating system Clutch control adjustment Clutch control is adjusted as follows 1 Adjusting clearance between piston and piston tappet of the main cylinder 1 1 Screw main cylinder 1 fig 3 tappet into the fork 6 observing B dimension 10 1 5mm tighten nut 10 2 Rotating bolt 4 adjust free travel of pedal 9 measured at the cover center within C dimension 6 12mm to ensure clearance between piston and piston tappet of the main cylinder 1 3 Tighten nut 5 2 Adjusting free travel of clutch shifter 1 Remove backward spring 23 from actuating cylinder 19 2 Remove pin 15 to disconnect rod 18 from arm 14 22 Fig 3 Clutch control 1 Main cylinder 2 Tank 3 23 Backward spring 4 Bolt 5 10 17 Nut 6 16 Fork 7 15 Pin 8 22 Bracket 9 Pedal 11 Piping 12 Elbow 13 Flexible sleeve 14 Arm 18 Rod 19 Actuating cylinder 20 Protective cap 21 Bypass valve 3 Turn arm 14 counterclockwise until 3 Tighten bypass valve 21 and release release bearing thrusts against release clutch pedal lever 4 Flush the system until there are no air 4 Holding ro
69. mode Fuel filters coarse filter and fine filter with replaceable paper filter element Turbocharger centripetal radial turbine on a single shaft with centrifugal compressor Type C14 126 01 Czech Republic Fuel type diesel Basic e L 0 2 40 L 0 2 62 summer e Z 0 2 35 C Z 0 2 45 C winter e 0 2 up to 45 C Substitutes e L 0 5 40 L 0 5 62 summer e Z 0 5 35 C Z 0 5 45 C winter e A 0 4 up to 45 C Foreign e BS 2869 ASTM D VV F 800 and other summer e DEF 2402B SAE and other winter e SAE VV F 800 up to 45 C Fuel tank capacity 95 1 Air filter Donaldson with dry paper filter element Engine lubrication system Type combined with oil cooler with water oil heat exchanger Oil filtering prefilter mesh fine centrifugal filter paper filter element Min oil pressure 0 08 MPa 0 8 kgf cm at 600 RPM Normal oil pressure 0 25 0 35 MPa 2 5 3 5 kgf cm at 1800 RPM Max pressure at cold engine up to 0 6 MPa 6 kgf cm Refill capacity 12 Motor oil brands Basic 5 C to 50 C e M 10DM 40 C to 5 C e M 8DM Substitutes Not for MTZ 821 For MTZ 821 3 921 3 5 C to 50 C e M 10G gt x 40 C to 5 C e M 8Gx Foreign 5 C to 50 C e Shell Rotella TX 30 HESSOL and other 40 C to 5 C e Shell Rotella TX 20W 20 HESSOL and other Friction clutch Type friction dry
70. n gear support bearings axis check and adjustment Verify tightness in bearings 4 5 Adjust if necessary Bearing preload should be equal 0 03 0 06mm Stub axle turning force applied to flange 6 should be equal to 60 80 N with correctly adjusted bearings If necessary adjust as follows e Unscrew four bolts 2 screw two disassembling bolts into threaded bores in axle 1 and press the axle out to allow adjusting shims 3 removal installation e Remove or install required number of adjusting shims from under the upper axis 1 flange Diametrical shims should be of equal thickness e Screw disassembling bolts out and tighten bolts 2 to 120 140 Nm Maintenance No 3 TM 3 each 1000 operating hours Includes mentioned above and the following operations Operation 37 Engine cylinder head bolts torque verification NOTE Perform this operation at warm engine only e Disassemble rocker cover cylinder head cover and rocker shaft assembly e Using a torque wrench verify and tighten cylinder head bolts in sequence according after the figure to the right Bolt torque 93 IMPORTANT necessary valve operation Cii L 15 Fi gt Le o ur m m nn B uni Hr TAN EM E TM E Lhe JF LI zi UN mj e AS D Verify clearances adjust after if this 94 Operation 38
71. n wheels and ground 3 Remove front wheels 4 Unscrew nuts fixing the wheel disk to FDA reduction gear flange Exchange wheels complete at both sides to get required track Pay special attention to ensure wheels rotation direction correspondence to an arrow at the tire side 1 e lugs direction should be the same Tighten wheel fixing nuts to 250 300 Nm Front axle toe in adjustment Wheels toe in 1s adjusted by changing steering rod length as follows 1 Drive the tractor not less than 3 meters straight at a plain ground 2 Measure dimension A between two opposite points at the rim shoulder in the front part of the front axle at the wheel axle level 3 Move the tractor forward to rotate front wheels by 180 approximately and measure dimension B in the rear part of the front axle between the same points as when measuring A dimension A dimension should be less then B dimension Measured difference constitutes wheels toe in and should be equal to 0 8 mm To correct toe in 1 Loosen nuts of adjusting tube at the steering rod 2 Set required toe in rotating the tube 3 Tighten the nuts 48 Setting rear track 14 9 30 tire DW12 30 wheel K mm Disk is interfacing with the hub Disk enforcing ring is outside Rim _ bracket 15 installed at recess at the disk face Wheels are interchanged between sides Disk enforcing ring is interfacing with the hub Rim bracket is installed at recess inside 420 70
72. nder the fine fuel filter cap 1 Install flushing pump handle Fuel supply 95 NOTE In case of hindered engine start loosen sleeve nut of each injector fuel line and remove air from the system cranking the engine within 10 15 s Tighten the sleeve nut Operation 40 Flushing engine breather e Unscrew bolts 1 and remove breather housing 2 e Remove the breather from the housing flush it with diesel fuel and blow with compressed air Add some oil into the breather filter let 1t drain and reinstall the filter Operation 41 Generator check Remove drive belt 1 from generator pulley 2 and check free rotation of generator rotor and play in bearings Check state and tightness of terminal connections Tighten terminal connections and generator fasteners if necessary Contact qualified specialist in case of excessive play in rotor bearings Operation 42 Outer bolted connections Check and tighten if necessary the most important bolted connection e Front and rear wheel nuts rear wheel hub nuts e Front brace half frame girders ballast weights Engine clutch casing Clutch casing gearbox casing Gearbox casing rear axle casing Rear axle casing brackets of rear hitch and towing coupler Front and rear cab supports Rear axle casing half axle sleeves Cardan shaft flange nuts Cardan drive intermediate bearing casing clutch casing e Steering hydraulic
73. nes etc regardless applied end type Drive speed should not exceed 8 km h In order to avoid overloading PTO drive with coupled inertia machines balers harvesting combines etc use cardan shafts with overrunning clutches on PIC side Using rear PTO for 540 RPM install safety coupling on PIC side to limit power takeoff over permissible values Safety coupling may be used as well for overload protection of the drive Cardan shaft installation Using cardan shaft with protective covering and PTO protecting bridge ensures safe connection End forks should be coplanar Cardan ball joint inclination PTO angle deg max fens velocity 110 mm min Engaged 25 Disengaged 50 briefly Telescopic elements of cardan shaft should overlap by not less than 110 mm in order to avoid disconnection and jamming 66 Shaftless PTO drive 0 145 0 395 21622338 VOM COVER Dimensions for coupled machine Certain machines may be installed on PTO directly without cardan shaft reduction gears hydraulic pumps etc Ensure case centering per 0162mm in PTO cover Provide grooves on the edge side and at PTO end spline out in order to avoid damage PTO cover fixing studs may be replaced with longer ones of the same size if necessary Mounted machine installation ATTENTION Mounted machine installation should be agreed with RUPE MTZ beforehand To connect mounted tech
74. ng hours 37 Engineheadfixingbolts 38 Roughfuelfiller Fine fuel filter _ J O Engine breather 39 40 4 2 1997 40 41 Generator 1 3 External bolted connections Engine oil prefilter Oil in intermediate bearing wheel reduction gear casings and main drive casing Oil in power steering tank Special maintenance after 2000 operating hours 49 Engine injectors o J d Centrifugal engine oil filter discharge valve 4 For MTZ 821 3 921 921 2 921 3 921 4 Not shown at lubrication layout Paper filter element for MTZ 921 3 921 4 79 Seasonal maintenance should be combined with scheduled maintenance works At shifting to autumn and winter conditions At shifting to spring and summer conditions with stable daily average temperature below with stable daily average temperature over 5 C 5 C Change summer oil brands for winter ones see Change winter oil brands for summer ones table on lubricants in engine oil pan in engine oil pan summer standards antifreeze coolant Disassemble cardan shafts and check axial flange tightness at transfer box axles intermediate bearing axles and main drive gear Tighten nuts to remove axial play Refill capacities Engine lubrication system 12 Transmission casings 0 FDA casing O Reduction gear casing at FDA final drive each o oZ o o 5 O 250 4 Casing of PVD reduction gear
75. ng means is not allowed 46 Areas for storing tractors and fuels and lubricants should be rounded with not less than 3 m wide ploughed strip and provided with fire fighting means 47 Charge tractors with fuels and lubricants mechanically with engine stopped Use light at nights Try to avoid fueling tanks up from buckets 48 Clean parts and assembly units from plant residues prior to perform repair with electro gas welding in the field 49 Prevent manifold and exhaust pipe clogging with dust fuel straw etc 50 Prevent straw winding round rotating parts of machinery coupled to the tractor 51 Take appropriate fire safety measures when rinsing parts and assemblies with kerosene or gasoline to avoid vapors ignition 52 Never operate the tractor in fire hazardous areas with removed bonnet and other protective devices from hot engine parts 53 Never use open fire to warm up oil in the engine oil pan when filling tanks with fuel or to burn radiator core contaminants out 54 Emerging fire seats should be buries under sand covered with tarpaulin bagging or other compact material 55 Avoid inflammable materials being close to exhaust manifold and pipe with running engine 56 Apply silencer or separate spark preventers in exhaust system when harvesting hay or straw or working in areas of high fire hazard Section 3 TECHNICAL SPECIFICATIONS Overall dimensions and weight Parameters Value 265 70R16 f 12 4116
76. nical appliances spraying tanks loaders stackers etc the tractor is provided with a series of installation holes suitable for strapping frames half frames and other elements Selecting agricultural machines There is wide range of various machines and agricultural tools for agricultural tractors Such technical appliances have various technical performance determined by its type and application Thus tractor s operation manual RE provides information on tractor s structure operational machinery abilities for coupling loading modes and safety regulations allowing correct machine selection and connection Anyway manufacturer s recommendations are not universal for all operation cases as even if coupled with the same machine tractor s energy performance and machine and soil effect on the tractor may vary greatly in different operation conditions 67 ATTENTION Selecting agricultural machines with active working elements keep in mind that VON end rotates clockwise PTO edge view When coupling or purchasing certain machines ensure its compatibility with MTZ tractor as follows Get recommendation by machine s supplier manufacturer if possible Examine machine and tractor operation manuals Check compatibility In power consumption In hitch load capacity In connection dimensions including correspondence of PTO and machine s cardan coordinates In permissible TC tire and axle loads Ensure availability of requ
77. nto the tank close the cover and fasten with bolts Remove oil filler cap 3 and add oil to the upper mark at oil meter if necessary NOTE If the following replace filter element in the power steering oil tank each 1000 operating hours Operation 33 Removing sediment from fine fuel filter Unscrew drain plug 1 discharge sediment until clean fuel with no signs of water or dirt flows out Install drain plug 1 Flush the fuel system if necessary Operation 34 Transmission oil change Check transmission oil level with a dipstick 1 to the left of the gearbox Normal operating oil level should be between the middle and the lower marks at the dipstick In case of transmission oil level below the lower mark at the dipstick remove transmission oil filler cap 2 and add oil to normal operating level Remove transmission oil filler cap and add oil to correct transmission oil level if necessary Perform maintenance after 250 hours i Ww EC 7 A 92 should be equal to 160 180 Nm 16 18 Operation 35 FDA housing oil level check kgf m e Check oil level in left and right housings of lower FDA reduction gear conical pairs Add oil to the level of inspection and filler ports closed with plugs 2 if necessary e Check oil level in FDA differential case Add oil to the level of inspection and filler port closed with plug 1 1f necessary Operation 36 Reductio
78. oils M 10G updated M 8G2x M 10Gox e Industrial oil BECHEM Staroil No 32 HUNOLD Hydraulikoel HLP 32 Hydraulic system oil tank capacity 45 1 For MTZ 821 821 2 21 Pneumatic system Compressor Type single cylinder piston type air cooled Dimensions 72x38 mm diameter 72 mm stroke 38 mm Trailer brakes control Type pneumatic single or double line blocked with tractor brakes Pressure 6 5 8 0 kgf cm 0 65 0 8 MPa Pressure limited with safety valve 8 5 10 0 kgf cm 0 85 1 0 MPa Rear rigging mechanism Type jointed four section of Cat 2 Load capacity 25 kN at 610 mm from suspension axle Suspension axle adjustment from 680 mm to 870 mm at request Electric equipment Vehicle network voltage 12V Starting system voltage 12V Battery 12V 2x90 A h located on the upper half frame rail Feeding system one 12V battery 12V starter feeding Generator 12V 1000W Starting aids glow plugs Lighting and warning light system e Front embedded road headlamps with upper and lower beams e Front and rear operation lights e Front and rear lights e Alarm lights e Tractor and trailer lights e Beacon light Tires Front 12 4L16 265 70R16 Rear 14 9R30 420 70R24 For MTZ 821 3 921 3 22 Section 4 GENERAL INFORMATION TRACTOR LAYOUT AND OPERATION Garden and vineyard tractors MTZ 821 MTZ 821 2 MTZ 821 3 MTZ 921 MTZ 921 2 MTZ 921 3 and MTZ 9
79. ontrolled with three handles 5 at operator s right hand Oil tank 14 of welded structure has capacity of 25 1 The tank features filling cap 10 with safety valve 11 oil level indicator 12 filter element 13 breather 9 and discharge cap 15 Hydraulic system oil pump is of right hand rotation is located at the drive Pump drive is switchable 15 independent from friction clutch and is located to right from the clutch casing The drive consists of casing 1 gear 2 on splines 3 of a shaft rotating in within two ball bearings Balls 4 inserted into the shaft 3 bore lock or unlock the shaft with spline bushings 5 7 with a fixture 6 controlled by a fork through the roller 11 tetrahedron Drive 12 ensures 1800 1830 RPM for the pump shaft 8 at rated engine speed Ball type clutch 3 4 5 6 7 allows switching the pump on and off with engine running at minimal idling speed To switch the pump on off e Loosen bolt 9 by 1 5 2 turns urn switching roller 11 with a wrench by the tetrahedron CW CCW to stop e Tighten bolt 9 For MTZ 821 821 2 45 Vere 727773 REFI CTTI Ti SS Ss SS Wk T SS CLIII ALLL A hecho 2 AIX TER AN Gear 2 is constantly engaged with PTO drive gear In disengaged state see activation scheme fixing 6 is shifted to the most right position balls 4 disengage with bushing 5 under centrifugal force and shaft 3 and gear 2 freel
80. orking conditions for operator and as convenient tractor control as possible Instrumental board with fundamentally new electric dashboards and electronic tacho speedometer are located on the steering column cable driven fuel supply control handle is located at the right wing of the dashboard gearbox control arm is located to the right hydraulic jack control arms are situated at the right control board parking brake control lever 1s located to the left rear PTO control arm is situated at operator s right hand multiplier control arm is located to the left from the dashboard distributor control arms are located to the right from operator s seat A board with from the left to the right heater front and rear working lights rear window washer and wiper switching keys Electric circuit fuses block is situated near the board under a cover Rear view mirrors are located on both sides of the cab Additional working lights are mounted on the roof Tractor design allows installation of additional process equipment available at request and extra loads 24 Section 5 CONTROLS AND INSTRUMENTS Switch for working lights at front brackets Starter and instruments switch Turn indicators upper and lower beam and horn switch Multiplier step up gear switching handle Engine stop knob Remote ground switch Steering wheel Front screen washer and wiper switch Fuel supply control arm 10 Alarm lights switch 11 Central light switch
81. otate fork 3 to adjust rod 5 length so that pin 2 freely enters bores in fork 3 and lever 1 turned clockwise to stop 5 Tighten locknut 4 and cotter pin 2 ill V n pu 59 Section 8 RIGGING Hitches and towing couples Rear hitch NU 2 Is used for the following applications hitched machines ploughs cultivators mills etc semihitched machines ploughs tillers etc Rated length of connection elements mm With platform axle length equal to 870 mm TCY 17K 01 double crossbar Is used for the following applications semihitched machines seeders vegetables harvester etc semitrailed machines croppers balers etc double crossbar single crossbar fork Mounted on Mounted platform axle independently on request on request pin axle mm Link pin diameter mm Vertical load on TC kN Machine turn angle in relation to the tractor with removed jaws degree Crossbar for platform axle per DIN 9676 Rear hitch NU 2 is produced per cat 2 and allows coupling machines from cl 1 4 and 0 9 tractor sets The hitch features solid lower rods connected to 01 crossbar double crossbar for agricultural machine lugs for cat 2 PTO drive Lower rods are transversally locked with internal telescopic drawbars capable to allow lower rods rocking within 55 mm Hookup rods feature automatic jaws allowing quick machine and tool coupl
82. p Turn remote battery switch off to avoid battery discharge 40 PTO end replacement Power take off PTO 1 Unscrew two bolts and remove cap 1 IMPORTANT Turn PTO on and off at low 2 Unscrew four nuts 3 and remove engine speed and with no working load at cover 2 agricultural machines transporters and tools 3 Unscrew six bolts 4 remove plate 6 Use free running clutch for machines with and end 5 great inertia moment 4 Install another end into the splined bore install the plate 6 PTO ends with 6 or 8 square sided splines are 5 Assemble other parts is order reverse to available for PTO 540 RPM and with 21 disassembly involute splines are available for PTO 1000 6 Replace guard and cap and fix with RPM nuts Set required drive speed and install an end corresponding to the speed prior to starting operating PTO WARNING Turn PTO off after each use for the sake of safety Two speed PTO switch position Engine PTO RPM RPM 5 2081 ID 2184 IMPORTANT Shift independent synchronous PTO switching rod to the middle position Drive OFF on completion the work and not using PTO WARNING Use synchronous PTO at lower gears at tractor speed not exceeding 8 km h only Otherwise powertrain may be badly damaged For MTZ 821 821 2 4 Special features of using rear PTO driven machines General notes 1 To connect a machine to the tractor ensure correct rear PTO control adjustment
83. perator A Is aware of safety measures and correct use B Has read and understood contents of the present operation manual NOTICE Due to constant product improvement structure of certain assembly units and parts may contain alterations not mentioned in the present edition Some technical data and figures in the present documents may differ from actual for your machine Dimensions and weights are approximate for reference only Contact MTZ dealer for details General note Left and Right terms in the present document are referenced from point of view of a viewer behind the tractor moving forward TO OPERATOR S ATTENTION 1 Carefully read the present manual prior to running the tractor and strictly observe its regulations 2 Use seasonal diesel fuel according to the manual Reduce engine oil change interval twice when using fuel with up to 1 sulphur content 3 Never allow idle engine operation exceed 15 minutes 4 Keep in mind that diesel engine may be started with gear lever in most left position only in drive range engagement positions I or II 5 With the tractor operating without rear PTO free two speed PTO drive switch should be set to position I 540rpm free synchronous PTO drive lever should be set to neutral middle position control lever should be set to PTO off position see Controls and instruments section 6 Synchronous drive of rear PTO should not be used with track unit moving faster than 8 km h Otherwise tra
84. r to cleaning filters in wet ambient as dust sticks to wet paper filter element Filter elements of venting system are located on both sides of the cab e Get a pedestal or small stepladder to access the filter e Unscrew two screws 2 with plastic caps under prominent edge of the roof e Remove panel 1 and filter 3 e Remove dust from the filter by tapping ATTENTION Be careful not to damage paper filter element e Clean the filter with compressed air under pressure not exceeding 1 MPa Keep the hose tip not closer than 300 mm to the filter in order not to damage paper filter element Direct air flow through the filter oppositely to ordinary air flow direction indicated by arrows at the filter e Replace the filter is reverse order Repeat procedure to clean filter at the other side of the cab NOTE Clean filter each 8 10 operating hours i e each shift in dusty conditions Operation 16 Front wheels toe in each second TM 1 Front wheels should toe in within 0 8 mm adjust 1f necessary according to regulations of Section 7 Adjustments Operation 17 Checking oil level in intermediated cardan drive bearing and in the upper FDA reduction gear conical pair hollow Check oil levels in hollows of intermediate bearing and FDA reduction gear upper conical pairs Add oil if necessary to the lower edges of inspection and filler openings closed with plugs 1 2 Replace and tighten the plugs
85. rate the tractor in enclosed compartments with insufficient ventilation exhaust gases may lead to death 14 In case of engine or steering fail during Operation immediately stop the machine Steering with stopped engine required much greater force applied Non operating engine with no pressure in steering system lights oil pressure indicator 15 Do not stay under lifted agricultural machines Never leave rigs lifted up for long stops 16 Be careful not to exceed maximum total weight of tractor and coupled machinery and axles loads as per Section 3 Technical specifications 17 Be careful not to injure a person or damage property while lifting agricultural digs up and down and turning the tractor 18 Cardan shaft transferring torque from PTO to machinery tips should be enclosed 19 Ensure any supplementary equipment and auxiliaries are installed correctly and fit your tractor Keep in mind danger of misusing a tractor for yourself and other persons Do not use equipment not designed to be installed onto a tractor 20 Be careful not to roll over Choose safe speed according to road condition especially when driving off road crossing trenches and slopes and in sharp turns 21 Widen tractor s wheel track as much as possible for driving at slopes 22 Avoid sharp turns with full load and at high speed 23 To use the tractor for transporting e Widen wheel track as much as possible e Interconnect brake pedals
86. rators are allowed to use the tractor only 3 Use tractor s safety belt if any in operation Contact dealer otherwise 4 Never take passengers into the tractor s cab as there is no seat provided 5 Keep all warning labels clean Replace damaged or missing labels 6 Thoroughly inspect the tractor trailed machinery rigs and coupling prior to commencing work Ensure its complete operability prior to commencing work Trailed agricultural machines transporting trailers should be equipped with rigid hitches to prevent them swaying and tractor being run down while transporting and with safety chains and cables 7 Prior to starting the engine engage parking brake free PTO switch should be turned OFF PTO gear changing rod Synchronous Free should be set neutral range and gear changing lever should be set neutral Safety regulations for tractor operation ATTENTION Do not start engine from outside operator s place Always stay in the cab at operator s seat when starting the engine and operating controls 8 Never start engine with towing to avoid intensive engine parts wear 9 Never start engine and never operate controls from outside operator s place 10 Warn surrounding and working on trailed machinery persons prior to commencing work 11 Never leave tractor in motion 12 Turn PTO off stop the engine set PTO switching rod neutral engage parking brake and pull starter key out 13 Do not ope
87. rculate through the heating Closed valve open Clogged hoses clean Air unit or ice plugs in heater hoses remove Fan shall not operate consult qualified technician system connections Damaged hoses PNEUMATIC SYSTEM Insufficient air pressure in the tank pressure slowly rises and quickly drops at engine stop Repair Disassemble and send for repair 74 FAULT SYMPTOMS REMEDY No air bleeding to pump tires up Air bleeding valve rod is insufficiently flush Fully tighten connection hose but to connection with pressure regulator pipe Pressure regulator switches compressor to idling Depressurize the tank by 1 5 2 kgf cm Trailer braking system malfunction Section 10 MAINTENANCE Maintenance represents a system of preventive measures aimed at premature tractor wear prevention by creating and maintaining normal operational conditions and by adjusting wear parts and assemblies Generally maintenance does not require tractor disassembly is performed by operators Scheduled scope and intervals are binding Shift maintenance plays great role in measure system for holding tractor operability on TYPES OF TRACTOR MAINTENANCE Maintenance to prepare the tractor for operation Maintenance to prepare tractor for break in Maintenance during breaking in SM 8 10 Maintenance after breaking in After 30 operating hours Scheduled maintenance Shift SM 8 10 Maintenance No 1 TM 1 125 Maintenance No 2 TM 2 500
88. rder to connect machines with other fittings Steerability and axle load criteria Hitching with the rear hitch is one of the most widely used ways to couple machinery It creates need to ensure longitudinal stability of TMA without prejudice to tractor steerability Longitudinal stability is measured with steerability criterion being a ratio of steering axle load to the tractor s service weight Mp Ku Mem gt 0 2 Ku tractor steerability factor Mp share of full service weight of tractor acting on the front wheels of a tractor coupled with machine Mem tractor service weight without machine Required steerability factor is achieved with placing ballast weights available on request However the ballast may be used to improve towing capacity of the tractor Permissible axle loads Fon Mp 2t but not exceeding overall load capacity of single front or rear wheel tires Overall load acting on the tractor wheels should never exceed Mp Mz x 6 t 61 Rear hitch RH Towing coupler TC crossbar standard version RH and TC are united into a single assembly mounted on brackets at the rear axle casing sides fig 1 RH connection points are represented by Walterscheid automatic jaws and correspond to the second category RH is lifted up and down with hydraulic jack levers Distance between connection points of the lower rods is the platform axle length at jaw pivots and is equal to 870 mm The crossbar is
89. required range I or by turning the lever from neutral to the most left pull and pushing it forward or pulling back to engage required range Return the lever to neutral position e Select required gear switching layout and engage according to Back gear for MTZ 821 821 2 Rear axle differential lock is controlled with a handle at the left operator s hand Move the handle fully up to lock the differential The differential 15 locked automatically after the handle is released INPORTANT Activate the pump at low idle run of the engine only Turn the pump off for cold engine start or for maintenance Rear PTO control Independent and synchronous drives switching handle The handle 2 has three positions e Independent drive ON utmost up position e Drive OFF middle position e Synchronous drive ON position Engage independent and synchronous drives at lowest stable engine speed To engage synchronous drive e Start the engine e Fully press clutch pedal and engage 1 gear lowest 21 e Slowly release the clutch pedal and simultaneously move the handle to the lowest position INPORTANT Synchronous PTO drive shall be use at lower gears at speed not exceeding 8 km h only Otherwise the tractor s powertrain may be badly damaged Set the handle 2 to the middle position Drive OFF and replace PTO end cap when not using PTO Parking brake control arm
90. rheated eliminate air intake capacity restores as oil cools Hitch platform does not lift down with the Slide valve jams in hydraulic jack distributor handles set to the front position additional casing in Lift Up or Neutral position due to pusher pressing is required contaminated oil rinse the system replace discharge filter and fill the tank with clean oil Mounted plough pops up out of soil or deepens Destroyed power cell spring replace the spring excessively with little handle shift in force adjustment mode Handles shall not hold the set position Worn friction washers fixing handles to the bracket Heavy hydraulic system vibration with the tool 1 Destroyed or shrunk spring replace the going down spring 2 Destroyed stop replace the stop Low charge of the battery Increased transition voltage between battery Strip connection terminals tighten and lubricate terminals and wire tips due to slackening or noncontact areas with petrolatum Tighten oxidation ground switch fixation and ground bridges Replace voltage regulator at generator Replace Disconnected one of wire terminals to the Secure tips at battery terminals battery Heavily oxidized wire tips and battery terminals Strip battery terminals and wire tips lubricate their noncontact areas with petrolatum interlock switch replace the switch battery discharge Repair Replace Warm air shall not enter the cab Water shall not ci
91. rize the tank with air until safety valve 6 is activated at pressure of 8 5 10 kgf cm Loose locknut 7 and adjust the safety valve activated at pressure exceeding the said range with screw 8 Tighten the locknut Screw cap 2 in gradually to adjust force of springs 3 4 to ensure discharge valve 5 opening at 7 7 8 0 kgf cm in the tank Fasten the cap 2 the required position with paint applied to the casing thread put cover 1 on Partly open condensate discharge valve of the tank and depressurize the tank to 6 5 7 0 kgf cm Valve 5 should close and switch the compressor to tank pressurization mode Disconnect control pressure gauge from the tank d SS SS in p 1 i T of ae P f aif ya pn A A PP AL Ca d RS M im E we i 7 EM HN Adjusting FDA cardan shaft Adjust safety coupling in intermediate bearing and verify cardan bearings play for the cardan drive Tighten flange 1 nut 2 of the rear intermediate bearing shaft end to set the safety coupling to transfer 40 80 kgf m 400 800 Nm of torque Adjusting FDA drive transfer box control rod Adjust the rod as follows 1 Set lever 7 to FDA ON forcedly position upper fixed position 2 Loosen locknut 4 by 2 3 turns uncotter and remove pin 2 3 Turn lever 1 clockwise to the lowest position to completely engage transfer box 8 4 R
92. rized air energy 12 1 Compressor 2 Pressure regulator 3 Air bleed valve 4 Tank 5 Alarm pressure signaling light 6 Pressure indicator 7 Pressure cell 8 Alarm pressure cell 9 Condensate discharge valve 10 Feeding line 11 11a Coupling heads 12 Control line 13 Brake valve Air is taken into the system from the engine s intake manifold Compressor 1 compresses and passes air to the tank 4 through pressure regulator 2 keeping required pressure in the tank Compressed air passes from the tank to the brake valve 13 and to the feeding line 10 with constantly pressurized coupling head 11 with red cap Hydraulic system The brake valve is connected via the control line to non pressurized coupling head 11a with yellow cap Brakes of trailers and agricultural machines are controlled in two modes direct and automatic Direct brakes control uses control line 12 pressure increase up to 6 5 8 0 kgf cm to stop the tractor Feeding line 10 keeps pressurized and continues pressurized air supply to the trailer s pneumatic system 44 Hydraulic system includes oil tank 1 gear pump 4 pump drive 3 side outputs 2 rear outputs 7 external cylinder control handles 5 follow through distributor 6 and hydraulic jack 8 Components layout is given below top view Hydraulic distributor 6 is located at the right of the tractor s rear and is c
93. rks If necessary remove filler cap 1 and add oil to II mark with hitch in the lowest position NOTE If using machines requiring great oil takeoff add oil to the level corresponding to the upper mark with retracted rods of hydraulic cylinders at mounted machine eT 81 Operation 4 Condensate discharge from air tank On completion of the work with pressurized air tank pull horizontally discharge valve ring 1 to remove condensate Operation 5 Power steering oil tank level check Place the tractor on a plain horizontal ground and stop the engine prior to checking oil level NOTE Loosen two fasteners and remove left side facing grill to access the power steering oil tank the tank is installed onto the front brace in front of the oil cooler Check power steering oil tank level with an oil metering dipstick 1 Oil level should locate between the upper and the lower marks at the dipstick Remove oil filler neck cap 2 and add oil to the upper mark if necessary Operation 6 Checking brake fluid levels in main clutch cylinder and main brakes tanks Visually check fluid levels 1n the main clutch cylinder tank 1 and in main brake cylinder tanks 3 Oil level should locate between MIN and MAX marks at the tank shells If necessary remove caps 4 and add brake fluid to MAX level i e to 1545 mm from the upper tank edge Neva M ROSDOT or analogous
94. switch position Understeering switch right 2 Allows switching on windshield washer and wiper at 1 low 2 high speed Windshield wiper switch has three fixed positions 30 e 0 OFF e I Low speed e II High speed NOTE The arm has to be manually returned to OFF position Windshield washer is switched on by pulling the arm up and simultaneous switching wiper at the 2 speed The arm may be positioned anyway Positions for switching windshield washer on in not fixed and the arm is returned to initial position To activate horn press the arm axially in any switching arm position Dashboard 1 Engine coolant temperature indicator with alarm light Indicator scale has three sections e Operating temperature 80 100 C green e Not operating temperature two 40 80 C and 100 120 C red 2 Engine oil pressure indicator with red low pressure alarm light Indicator scale has three sections e Operating pressure 100 kPa to 500 kPa green e Not operating pressure two kPa to 100 kPa and 500 kPa to 600 kPa red e Pressure up to 600 kPa is permissible for cold engine start If the pressure alarm light is on at running engine immediately stop it and correct the fault 3 Fuel tank level indicator with reserve level alarm light The instrument has the following divisions 0 1 4 1 2 3 4 1 Never consume fuel to empty tank with the pointer in or
95. to the plug of connected machine harness Socket terminals are designated as follows 1 Left turn indicator Horn Ground Right turn indicator Right side light Stop light Left side light Portable lamp socket ta 2 Q2 Operator s seat IMPORTANT Adjust the seat prior to starting tractor operation Stay present in the seat while adjusting The seat has mechanical suspension with 90 mm stroke and hydraulic damper Suspension is protected with a rubber cover The seat may be adjusted as follows 1 Longitudinal adjustment within 150 mm range 2 Weight adjustment 50 kg to 120 kg stepless 3 Height adjustment 35mm 4 Back inclination adjustment 5 to 20 Longitudinally the seat is adjusted with a handle 1 Turn it counterclockwise to stop move the seat and release the handle Operator s weight adjustment requires alternate motion of handle 2 The handle has two positions to increase weight to decrease To change handle direction move it fully forward and turn by 180 Seat height is adjusted with handle 3 Move it to the right to lift the seat down and to the left to lift the seat up Back inclination is adjusted by pulling adjusting arm 4 up and lowering and fixing the back as required NOTE Do not clean the seat upholstery with solvents Use warm water with small amount of detergent only 35 Steering wheel adjustment To
96. tol 24 grease through a grease fitting in shifter casing NOTE Do not overfill the shifter with grease Excessive grease may get to friction surface of the friction clutch Operation 14 Batteries WARNING Batteries contain sulfuric acid that causes burns at contacts with skin eyes or cloths In case of acid contact with external body surface rinse it with much clean water Drink much water or milk if acid is swallowed Wash eyes with much water within 15 minutes and take medical advice in case of contact with eyes Do not allow sparks or fire get close to the acid area as it may provoke explosion Charge batteries in vented room Wear goggles and protective gloves when servicing batteries e Remove left and right side grills at the front facing to access batteries e Clean the batteries of dust and dirt e Keep the batteries clean and dry e Ensure secure battery fixation Clear surrounding surface prior to removing caps e Check electrolyte level It should be 12 15 mm over protective mesh or between level marks at transparent battery casing Check acid density in each battery cell Density should correspond to fully charged battery Add distilled water 1f necessary Ensure cleanness of terminals 2 and plugs 3 Grease terminals with petrolatum and clean plug vents 3 if necessary 86 Operation 15 Cleaning cab heating and venting system filter ATTENTION Do not switch the fan on prio
97. ve steering hydraulic cylinder rod or turn wheel to the most left position to retract the rod Lift lower RH rods to the lowest position Rotate engine crankshaft by 1 2 not less than monthly IMPORTANT Engine storing and destoring should follow engine operation manual To destore the tractor Jack the tractor and remove supports from under the machine Pump tires up to normal pressure Fuel tank up Check coolant and oil levels in all refill capacities Install fully charged battery to the tractor Take cover off the exhaust pipe Start the engine and check operability of all instruments controls and systems of the tractor Check operability of light and signaling devices Run the tractor without load to ensure its correct operation sound 104 Section 13 APPENDIX Electrical connections diagram Al BA2 Loudspeaker FU Fuse ontrol board oolant temperature indicator BPl pressure cell 1 1 2 1 Air pressure cell uel level sensor peed sensor 1 2 eadlamp E4 E7 Operation light E8 E9 E10 ab lamp egistration plate light Lamp amp Fl o use block F2 Distribution block Fuse block F4 Fuse block enerator GBI GBI ccumulator battery orn ignaling relay ndicator light block ront light HL3 HL4 Rear light breaker M2 pan M4 5 Operation lights switch AS AT SA9 CPS switch indicator cell indicator cell indicator cell P4 SPA Alarm air
98. vot Supports FDA drive consists of a transfer box intermediate and front cardan shafts and intermediate bearing with multidisc wet Back reduction gear back gear for MTZ 821 821 2 friction clutch FDA is driven by the secondary gearbox shaft to ensure synchronic rotation of the front and rear wheels at every gear FDA 1s mechanically controlled by a lever with three fixed positions FDA FDA on off automatically and FDA forcedly FDA is connected to a beam by two hollow axles allowing the axle with wheels to swing transversely e Parking brake includes main brakes with independent mechanical control Hydraulic rigging system consists of a hydraulic jack with two vertical cylinders and embedded regulator of a rigging mechanism and a distributor to control external consumers external cylinders Hydraulic jack performs the following functions e Tractor suspension lifting up and down with its dead weight e Automatic lifting suspension down to the set position relative to the tractor positioning adjustment e Adjusting ploughing depth according to soll resistance force adjustment e Ploughing depth force adjustment with positionally limited maximal depth combined adjustment e Automatic pump discharge in transport condition The hydraulic jack is controlled with two handles of force and positioning adjustment accordingly Force adjustment handle is the closest to the seat at the
99. wing tractor models MTZ 821 D243 4x4 MTZ 821 2 D243 S 4x4 MTZ 821 3 0245 4352 4x4 MTZ 921 D245 5 4x4 MTZ 921 2 D245 5S 4x4 MTZ 921 3 0245 552 4x4 MTZ 921 4 D245 5S3A 4x4 4x4 tractors MTZ 821 821 2 921 921 2 921 3 921 4 is a garden and vineyard version of universal wheeled tractor cultivator MTZ 822 922 featuring smaller dimensions and ground clearance These tractors are aimed at performing different works at fruit plantations in gardens and vineyards as well as in industry construction public services and transport equipped with rigs semihinged machines towing machine and appliances Used abbreviations and acronyms AB accumulator battery DL differential lockup QC quick coupler PFE paper filter element UBGP upper bevel gear and pinion of front driving axle reduction gears UDP upper dead point of engine piston PTO power take off PIC power input connection HMS hydraulic mounted system HPS hydrostatic power steering SM shift maintenance SPS spare parts set RH rear hookup CFE control filter element for diesel engine air filter main filter element GB gearbox TMA tractor machine assembly FC friction clutch H hookup FDA front driving axle TM technical maintenance TC towing coupler International symbols In relation to instruments and controls use manufacturer uses standard international symbols Symbols and their descriptions are given
100. y rotate in bearings In engages state fixing shifted to the most left position balls 4 are guided into the bushing 5 holes by the fixing 6 taper and torque is transferred from gear 2 through shaft 3 and splined bushing 5 to the pump shaft The drive is suitable for another pump NHs10 16 driven by the splined bushing 7 ATTENTION Never try to couple machines with hookup or with TC and hydraulic brakes for machines of service weight exceeding half of the tractor s one if hookup hydraulic system is failed ATTENTION 1 Hookup hydraulic system pump should be always on OFF function for the pump 15 for emergency only Pump drive may be disconnected in case of the pump failure or broken oil lines connected by the pump 2 Stop the engine prior to switching hookup hydraulic system pump off Having disconnected the pump drive decouple the following e Hitched or semihitched machine from hookup e Hitched or semihitched machine with hydraulic brakes for machines of service weight exceeding half of the tractor s one from TC 46 HMS hydraulic jack Hydraulic mounted system is equipped with hydraulic jack and ensures operation in the following modes e Lifting hanging platform up and down with its dead weight e Positioning adjustment automatically maintained position of the hanging platform in relation to the tractor e Force adjustment tillage depth adjustment in relation to so
101. ystem with clean water e Inspect cooler core cleanness Wash the cooler and blow the core with compressed air if necessary air flow directed from the engine side IMPORTANT Clogged cooler loose fan belt or contaminated system inside may provoke engine overheating and breakdown Operation 53 Engine starter maintenance e Remove screws 1 and cover 2 e Inspect collector 3 surface state e Ensure free travel of brushes 5 inside the holder Brush pressure over the collector surface should be equal to 0 75 1 00 kgf Otherwise replace brush holder 4 assembly e Send the starter to a repair workshop in case of significant collector surface burn Operation 54 Centrifugal engine oil filter drain valve adjustment In case of engine oil pressure drop below 0 10MPa 1 0 kgf cm at rated engine speed and normal operating temperature stop the engine and remove the cause of pressure drop Lubricating system oil pressure may be adjusted by tightening adjustment screw 1 of centrifugal oil filter drain valve with removed threaded plug not shown Paper filter element for MTZ 921 3 921 4 102 TABLE OF LUBRICANTS Lubscat d Name grade and code of lubricants and liquids ee Number standard Operation of points and capacity up points M 8DM motor oil M 8Gox M 8DM 40 C 40 C to 5 C to 5 C 12 0 12 0 1 Engine oil 10DM motor oil M 10G x 5 C to 5 C to 50 C 50

MTZ 921 User Manual - MTZ Equipment Ltd.

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