ELECTRO LIFT® power units service manual
Contents
1. thy T FILTERS FIGURE 0 3 Refill Electro Lift unit with M 1 Fluid by fully retracting lift rod Ram and filling reservoir to 1 1 2 below the filler hole On Power Angling models fill and bleed hoses and Power Angling cylinders by loosening hydraulic fittings at cylinders until they leak Power angle plow repeatedly from one side to the other until fluid flows steadily from the leaking fittings while maintaining a constant check on the reservoir fluid level Raise and lower the plow several times and with lift rod fully retracted give a final check to the fluid level and replace filler plug Filters Clean the two filters only one in E 46 and E 46H two in Power Angling units located in base of unit with mineral spirits or equivalent and blow out with compressed air See Figure 0 3 for filter locations Protection Against Rust and Corrosion When the Electro Lift unit is not used for extended periods protect the chromed lift rod Ram by fully extending it and coating it with chassis lubricant Full extension of the lift rod Ram fills the cylinder with hydraulic fluid On Power Angling models coat the exposed portions of the Power Angling cylinder rods Rams with chassis lubricant to protect them against rust and corrosion SECTION 1 GENERAL DESCRIPTION AND THEORY OF OPERATION CONTENTS GENERAL DESCRIPTIONS qaa saya cut 5 THEORY OF OPERATION2. ocn 5 UNC TIONS a qia O la i hanaq quae q a aha 5 Models E 46 E 46H eoa hie Doe bU Pa pes pue mia 5 ee Models 47 E 47H and E 57 E 57H 5 ELECTRICAL AND FLOW CHARTS conet asserat vade ves 6 18 ELECTRO LIFT UNIT COMPONENTS RAE esp cte 19 LE MOTORS a a 19 9 AMENCAN BOSO e 19 dicus 19 19 HypRAULIC PUMP e o 19 PRESSURE RELIEF VALVE nine 19 20 SOLENOID VALVES ak GA 20 M 20 20 A iu uu uu 20 B S lenoid u 20 VANS zac nad M eeu cunt 20 9 aS uaqta 21 szata b 21 CROSSOVER RELEF VALVES edes Ud a din Pus qusaqa 21 SwrrcH M DELS 46 AND E 46H cire 21
3. E 46 E 47 Relief Valve setting E 57 Non Adjustable CROSSOVER RELIEF VALVE Opening Pressure HYDRAULIC FLUID CAPACITY 1650 50 5 2000 5 3800 400 P S I NOTE 1 Quart 32 Fluid Ounces Model E 46 27 oz Model E 46H 1 qt 3 5 oz 35 5 oz Model E 47 amp E 57 Unit 28 oz Hoses amp 1 1 2 x 10 Cylinders 16 oz Total 1 qt 12 oz 44 oz Model E 47 amp E 57 Unit 28 oz Hoses amp 1 1 2 x 12 Cylinders 19 oz Total 1 qt 15 oz 47 oz Model E 47H 8 E 57H Unit 1 qt 4 5 oz 36 5 oz Hoses amp 2 x 12 Cylinders 28 oz Total 2 qt 5 oz 64 5 oz Model E 57H MDII Unit 1 qt 4 5 oz 36 5 oz Hoses amp 1 1 2 x 10 Cylinders 16 oz Total 1 qt 20 5 oz 52 5 oz TORQUE SPECIFICATIONS Thread Torque Size In Lbs Reservoir Cover Retaining Nuts 5 16 24 100 125 Pump Assembly Retaining Nuts Cap Screws 5 16 24 100 125 End Plate or Valve Block Retaining Cap Screws 5 16 18 96 120 Motor to Pump Retaining Cap Screws 1 4 20 45 55 Drain and Filter Plugs 1 2 20 75 85 meye amp ICE CONTROL EQUIPMENT ELECTRO LIFT power units service manual MODELS E 46 E 46H E 47 E 47H E 57 E 57H Meyer Produc Diamond E 18513 Euclid Ave Clevela Bn OH 44112 1084 6 Angell Lanee Damariscotta ME 04543 9720 Phon 216 486 Phon e con 552 2227 emailewarranty meyerproducts com www diamondplow com info diamondplow com 2004 Printed in the U S A PROD
4. 15 que 31114 331133 ro GION310S U3AOSSOWO Va REA H4QGNITAO a SH3NI142 HJMOd ze ES ST s LEE MS ANWA 423H2 TS d 0 0002 93 E LON TSd srosgi QION310S 5 uda L Werk JHN 319NV 1331 dd 4 IDNIS MILS YI IS TAM AI OL HAMOd 381A Jovan UKNOSD JM 5 SHIM JINYHO NON HOS 9 gay OWNS B OL 314A THU OOM IOS V OL Ysa TIONLNOD 04193713 16 1441 89 19 3 8 7 3 S1S0OW 1 2 SS Wels 20 FAYLNI Diva Nunuau DJ MANI i uni BEST dal 13H 3 OSSOH2 o q gt E aioN3108 HJONITAD 2 LO 117 SHJONIIAJ n SINFIONV SAMOd CI 15 cri gt ZAW dawaj i OIONS TOS QION3 10S du 17 9NIMIM H21IMS TIVNA STONY 1431319NV ELECTRO LIFT UNIT COMPONENTS ELECTRO LIFT UNIT COMPONENTS MOTORS 3 E 46 E 46H and E 47 47 The 12 volt DC high torque motor used on the Electro Lift units are interchangeable among all four models Its function in all four applications is to drive the hydraulic pump The motor is only energized and operating when pressurized hydraulic flu
5. because it functions differently it is a completely different switch In the off position the switch conveys no current In the raise position the switch conveys current to the solenoid switch and the Solenoid Valve When released an internal spring returns the toggle to the off position ELECTRO LIFT UNIT COMPONENTS CONT SWITCHES Power Angling Models Cont Dual Switch Control The second toggle switch is to angle the plow The positions are Off Center Position eAngle Left Left Position eAngle Right Right Position In the off position the switch conveys no current In the angle left position the switch conveys current to the solenoid switch When released an internal spring returns the toggle to the off position In the angle right position the switch conveys current to the solenoid switch and to the C Solenoid Valve When released an internal spring returns the toggle to the off position Single Lever Control A single lever control is also used on the Electro Lift models This switch five position functions the same as the two three position toggle switches previously discussed Electro Touch Control Pad IMPORTANT The power lead to the switch should be connected to a terminal on the fuse panel that is HOT ONLY when the ignition switch is in the ON position When the control switch is powered up yellow lights illuminate the arrows of the individual func
6. The commutator end cap is removed by removing the hex head cap screws as shown in Figure 3 4 While holding the motor in position on the pump remove the commutator end cap Remove the existing brush assemblies and brush springs Install the replacement brush assemblies making certain that the leads do not contact the commutator end cap or commutator and that the chamfered sides of the brushes are away from the springs Also install the replacement springs Tighten the brush holder screws to 35 40 in Ibs Tighten the motor terminal nut to 50 60 in Ibs and the lock nut to 3 5 in 16 Apply a thin film of American Bosch LU3001 grease or equivalent to the armature shaft where it contacts the end cap bearing Properly position the gasket and reinstall the commutator end cap as shown in Figures 3 64 and 3 65 Torque the cap screws and seal the cap screw heads as shown in Figure 3 40 Iskra Brush Replacement See Figure 3 66 51 VALVE CARTRIDGES and IMPORTANT The valve cartridges be damaged beyond repair by bending or denting the tube the portion of the cartridge surrounded by the coil Therefore do not grip the cartridge tube with pliers or clamp it in a vise A Cartridge NOTE Use only a 7 8 or a 1 1 8 hex deep socket to remove and reinstall the A Cartridge The Cartridge cannot be disassembled When operating normally the poppet can be pushed in app
7. Brush VALVE CARTRIDGES B amp C caput dta Exe pur e d rc ET B ac o ANE IO OS edu 5 P m U SPEGIFIGATIOINS cbe dude citu 30 GENERAL INFORMATION Using the proper guidelines and precautions all four model Electro Lift units are easy to disassemble and reassemble Figure 3 1 page 32 is an exploded view which applies to all four models It should be used as the primary reference for proper reassembly Where necessary this section includes additional information photographs and illustrations to assure proper and efficient repairs UNIT DISASSEMBLY AND REASSEMBLY Model E 46 E 46H and Power Angling units with the exception of the Power Angling Valve Assembly the parts and disassembly reassembly procedures are common to all models Many repair procedures including removal and replacement of the and Solenoid Valves can be accomplished without removing the unit from the vehicle While Figures 3 2 through 3 62 show the unit clamped in a vise make all possible repairs on the vehicle when possible NOTE Pump Assembly should not be disassembled since it cannot be serviced with the exception of the pressure relief valve pages 19 20 and pump shaft seal which is covered separately in this section Motor should be taken to the appr
8. hand 2 Thepower angling cylinders must be installed correctly on to the A frame The left cylinder Driver s side has a hose attached with a male half of a coupler at the end the right cylinder Passenger side has a hose attached with a female half of a coupler at the end 3 The solenoid coils must be on their proper valve The C coil green wire must be next to angling fittings The B coil red wire is located to the front of the Electro Lift Unit The coil black wire is smaller and is located on the back side of the unit See Drawing TESTING TIPS Many tests do not require removing the Electro Lift unit from the vehicle However more thorough testing can be performed using the Meyer Test Stand which allows direct pressure and amperage readings 1 Using a screwdriver or other small tool to check for magnetism of the solenoid coils Place the tool on the nut securing the coil and have an assistant operate the switch You should feel strong magnetic attraction 2 Usea test light or volt meter to determine whether there is power at the harness or switch The current 22154 Electro Touch Control has been redesigned Note The Electro Touch Controller now has raised buttons and its circuitry has been changed from analog to digital functions have not changed For troubleshooting for power at the solenoids do not disconnect wires To check for power prick the wire through the insulation for testi
9. the poppet valve again TAIELET FONI FIGURE 1 8 ELECTRO LIFT UNIT COMPONENTS CONT Under a condition such as when a hydraulic cylinder is extended to the end of its stroke eliminating additional space for the pressurized hydraulic oil to be pumped into the alternate opening and closing of the poppet valve controls the pump s pressure output and provides an escape for the pressurized hydraulic fluid The pressure relief valve used in the Electro Lift pump while more sophisticated than the one described functions in the same manner The pump pressure relief valve may be adjusted on the E 46 amp E 47 models to the specified pressure of 1650 5 by adjusting the Set screw after installing a suitable pressure gauge of 2500 P S I in the circuit Note The E 57 Model has a nonadjustable pressure relief valve and is factory set to 2000 PS I SOLENOID VALVES Hydraulic valves are simple in concept and all have the same basic function Control the direction of oil flow One type of Solenoid Valve is used on the models E 46 and E 46H and three types are used on models that Power Angle Each Solenoid Valve consists of two components the Cartridge and the Coil Cartridge The Cartridge consists of the hydraulic valve mechanism and an armature which enables the valve mechanism to be operated and controlled electrically The Cartridge is designed to screw in and out of the Electro Lift units much like the typical spar
10. ALL MODELS FIGURE 3 34 FIGURE 3 35 Reinstall reservoir using mallet to seat reservoir squarely Install cover assembly using mallet to seat cover making certain filter plug is properly located FIGURE 3 36 FIGURE 3 37 Drain plug and filters to be torqued to 75 85 in Ibs with Torque the bolts to 100 125 in Ibs using a 1 4 hex key or an 11 16 hex socket Remove nuts from pump studs and Allen Socket screw into base 42 REASSEMBLY ALL MODELS j E 46 E 46H amp E 47 E 47H FIGURE 3 38 FIGURE 3 39 Use a flat tool to hold the pump check valve in place and To reinstall motor align pump shaft quill and motor shaft assemble pump Torque the pump to 100 125 in Ibs with appropriate bolt holes Use a 10mm hex socket on the On the E 57 use a 1 4 Allen socket on the bolts and on the E 57 and a 3 8 hex socket on the E 46 and E 47 E 46 and E 47 use a 1 2 hex socket on the locknuts FIGURE 3 40 FIGURE 3 41 Torque cap screws to 45 55 in 16 using a 3 8 E Follow instructions under 47 or 10mm E 57 hex socket then apply Permatex Replacement of Hydraulic Fluid See POST SEASON MAINTENANCE on page 3 Form A Gasket No 2 or equivalent sealant around each cap screw head 43 CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3 42 FIGURE 3 43 Remove Acorn Nut 61 O ring 60 using a 15 16 open Remove Plug 58 and adjusting Screw 59 using a end wrench 3 8 open end wrench FIG
11. AT COMMUTATOR COVER E X A d a ST ELSTAMPED AMERICAN BOSCH 7 5510455 LI 190 adi Dia VE mx X F SINGLE and TWO TERMINAL FIGURE 0 2 MAINTENANCE The following maintenance information is intended as a basic guide for providing the Electro Lift unit with the proper service and care Sustained heavy duty operation or operating under adverse conditions may necessitate more frequent servicing General Maintenance Cleanliness The greatest enemy to any hydraulic system is dirt or contamination Therefore cleanliness must be stressed at the time of installation servicing and repairing Vehicle Electrical System Maximum performance and efficiency of the Electro Lift unit requires that the vehicle s electrical system be properly maintained and consist of Battery 70 Amp Hr Minimum or 550 Cold Cranking Amps Alternator 60 Amp Minimum Check Regularly 1 Battery Terminals Must be clean and free of corrosion 2 Electrical Connections Must be free of corrosion and tight 3 Battery Must be in first class condition 4 Alternator or Generator and Regulator Must be functioning to specifications 5 Hydraulic Fluid Reservoir Level A significant drop in hydraulic fluid level indicates a leak which must be located and corrected Insufficient hydraulic fluid may result in severe damage POST SEA
12. AY f ower Anging Kam WeglherPlug S rede eather Plug X Ta Driver s Side 4 Power Angling Ram Angle Right 24 SNOW PLOW WILL NOT RAISE 25 SNOW PLOW LEAKS DOWN straghi down 26 SNOW PLOW WILL NOT ANGLE LEFT MO nee Pre ES Pat Chach inspect Pa tia C 27 SNOW PLOW WILL NOT ANGLE RIGHT 28 SNOW PLOW WILL NOT HOLD ANGLE POWER ANGLING CYLINDERS PILOT _ CHECK CROSSOVER RELIEF 3800 400 P S I SECTION REPAIR PROCEDURES CONTENTS GENERAL INFORMATION slain rede UNIT DISASSEMBLY AND REASSEMBLY Disassembly eek kd RC e Additional Reassembly Points e ELM Shaft Seal Replacemeht a o ELECTRO LIFT Exploded VIGW Y Paris BreakGOw hh Disassembly PROTOS coat aisle id re atre are ck iesus Reassembly CROSSOVER RELIEF VALVE DISASSEMPIY annassa ER BRUSH REPLACEMENT u Iskra Brush Replacement American Bosch
13. Assy 24 volt 46 21929 21929 3 Washer Nyltite 5 16 2a 15727 15727 1 Motor 12 Volt 2 Terminal 47 20697 20697 3 Locknut 5 16 24 2b 15891 15891 1 Motor 24 Volt 2 Terminal 48 15972 15972 1 Solenoid Assembly 3 15889 15889 1 Pump Assy 49 15905 15905 1 ee A Coil Black Wire 12V 4 15874 15874 1 eeKit Pump Relief Valve 50 15660 15660 1 ee A Cartridge Valve 5 15870 15870 1 Relief Valve Assy 51 15431 15431 1 eee Seal Kit Valve 6 15878 15878 1 Plug w O Ring 48b 15661 15661 1 A Solenoid Assembly 7 15875 15875 1 Seal Kit Relief Valve 49b 15659 15659 1 A Coil Black Wire Plastic 8 15877 15877 1 Pump Shaft Seal 15662 15662 1 ee A Coil Black Wire 24V 9 22339 22339 3 Soc Head 5 16 18 x 1 3 4 50a 15660 15660 1 ee A Cartridge Valve 10 15045 15204 1 Oylinder Tank 51b 15431 15431 1 eee Seal Kit Valve 11 15131 15131 1 O Ring 3 1 2 52 15758 15758 1 Valve Assy w Coup 12V 12 15163 15163 1 O Ring 1 15 16 1 0 15779 15779 1 Valve Assy w Coup 24V 13 15198 15198 1 O Ring 1 1 8 1 0 53 22295 22295 1 Forged 90 Degree Elbow 14 15194 15194 1 Cover amp Seal Assy 54 22294 22294 1 Coupler Female Half 15 05119 05119 1 Wiper 55 22293 22293 1 Coupler Male Half 16 15131 15131 1 O Ring 3 1 2 56 15639 15639 1 Kit Pilot Check Valve 17 15199 15199 1 Sleeve 57 1 Ball Steel 08473 08473 1 P
14. FORM NO 1 562 R15 June 2004 Price 4 25 ELECTRO LIFT ELECTRO LIFT power units service manual MODELS E 46 E 46H E 47 E 47H E 57 E 57H Meyer Products Inc Diamond Equipment 18513 Euclid Ave e Cleveland OH 44112 1084 6 Angell Lanee Damariscotta ME 04543 9720 Phone 207 563 2227 Phone 216 486 1313 emailewarranty meyerproducts com d www diamondplow com email infoQdiamondplow com 2004 Printed in the U S A ae PRODUCTS INC FOREWARD This Service Manual includes complete information for servicing the following Electro Lift Units E 46 and E 46H 47 and E 47H E 57 and E 57H The information is grouped according to the type of work being performed such as diagnosis and testing disassembly and reassembly Special tools and specifications are also included in this manual All information illustrations and product descriptions contained in this manual are correct at pub lication time We do however reserve the right to make changes at any time without prior notice MEYER PRODUCTS INC SECTION INDEX Section Number Section TNIE Gad ok i RO Page 0 GENERAL INFORMATION AND MAINTENANCE 1 1 GENERAL DESCRIPTION AND THEORY OF OPERATION 4 2 DIAGNOSIS ici iiie rhe it Eee 23 3 REPAIR 30 4 SPECIFICATIONS 5 Meyer Products I
15. SON MAINTENANCE Meyer Hydraulic Fluid M 1 Meyer Hydraulic Fluid M 1 is a specially formulated mineral oil which maintains an almost constant viscosity from normal to sub zero temperatures Because it remains free flowing at extremely low temperatures the performance and efficiency are not affected Meyer Hydraulic Fluid M 1 also contains an additive which neutralizes moisture accumulating in the fluid due to condensation It is effective for a maximum of one year s use Meyer Products Inc will not be liable for damages resulting from the use of inferior or other fluids or oils Replacement of Hydraulic Fluid After a season s use completely drain the hydraulic fluid including hydraulic fluid in hoses and cylinders on Power Angling models Drain fluid through filler hole shown in Figure 0 3 or drain hole in base by completely retracting lift rod and unbolting unit to pour fluid out or using a suction pump On Power Angling models disconnect the fittings at the Angling cylinders completely retract the cylinder rods and purge cylinders and hoses of all hydraulic fluid Flush the complete system including unit hoses and Power Angling rams with a non wax cleaner If kerosene Parrafinic is used to flush the system the system must be flushed again to remove any kerosene with a Napthenic based cleaner that is wax free FILLER PLUG LIFT ROD E DRAIN PLUG gt
16. SwircrEs POWER ANGLING MODELS Eo SE Ee 21 s Dual Switch Mem c ER 21 22 ee 22 3 55 22 SOLENOID SWITCH ciecia 22 Rn Od rcr TT 22 GENERAL DESCRIPTION Electro Lift unit is an electrically powered and electrically controlled hydraulic mechanism specifically designed for use with Meyer Snow Plows The standard model E 46 raises and lowers the plow hydraulically with an integral 6 stroke hydraulic cylinder while the model E 46H performs the identical task for larger plows with an integral 8 stroke hydraulic cylinder In addition to raising and lowering the plow hydraulically the model 47 E 47H E 57 E 57H angles the plow hydraulically left and right via remote hydraulic cylinders The Electro Lift unit consists of a specially designed high torque 12 volt DC motor which is directly coupled to a gear type hydraulic pump The pump obtains its supply of hydraulic fluid from an integral reservoir which totally surrounds the integral hydraulic cylinder which raises and lowers the plow Included in all models is an electrically controlled and powered solenoid valve cartridge A which is energized to allow the plow to lower by gravity The models E 47 and 57 include an integ
17. UCTS INC
18. URE 3 44 FIGURE 3 45 Remove Plug 58 Adjusting Screw 59 and Disc 57 Remove Pressure Spring 55 44 CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3 46 FIGURE 3 47 Remove Poppet 52 Guide 54 Washer 53 Remove Cage 50 O ring 49 using special tool Spacer 56 FIGURE 3 48 Remove bottom O ring 48 using special tool 45 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 49 FIGURE 3 50 Correct order when reassembling Crossover Relief Valve Reinstall O ring 48 making certain it is seated to the bottom 47 Note All parts should be dipped in oil prior to their of the cavity assembly FIGURE 3 51 FIGURE 3 52 Install small O ring 51 into top of cage 50 Install small bushing 51 onto poppet 52 46 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 53 FIGURE 3 54 Assemble Poppet with bushing into Cage as shown To install Bushing 51 assemble Washer 53 onto the Poppet as shown Press Washer down on Cage this will put equal pressure on the Bushing Hold Washer 53 in place then remove Poppet from Cage FIGURE 3 55 FIGURE 3 56 Slide O ring 49 over bottom of Cage DO NOT push Seat Cage assembly 50 to the bottom of the block cavity assembly into block cavity Drift Pin lightly with a hammer until Cage assembly bottoms 47 out and seals against O rings 48 and 49 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 57 FIGURE 3 58 Reassemble Poppet 52 into Cage Reassemble Washer 53 sm
19. ace all the hydraulic oil in the system The complete system hydraulic unit power angling cylinders and hoses should be flushed Flush the system with Meyer Hydra Flush Fluid M 2 SECTION 2 DIAGNOSIS CONTENTS GENERAL INFORMATION runi tapa use 24 m 24 RAISE WOUBIESHOOUNG 47 etu dou toy em 25 LEAK DOWN Troubleshooting O eth npn nana ena ade 26 FLOWER Troubleshooting u u au uuu 26 ANGLE LEFT Troubleshooting 27 ANGLE RIGHT Troubleshooting 28 WILL NOT HOLD ANGLE Troubleshooting 29 CROSSOVER RELIEF VALVE Flow Chart 29 23 DIAGNOSTIC FLOW CHART FOR E 46 E 47 and E 57 ELECTRO LIFT UNITS These charts are intended to be used as an aid in diagnosing problems on the Electro Lift units They are not a substitute for factory training and experience Be certain to read the General Information and Testing Tips sections before attempting any troubleshooting General Information Before any troubleshooting is started make certain the following conditions are met 1 The moldboard is pointing straight ahead This can often be done by coupling the left cylinder into the right cylinder and push ing the moldboard by
20. ad motor not attached to pump NOTE Do not operate motor continuously for more than 30 seconds Applied Voltage 12 Volts DC Max Current Draw 24 Amperes Speed Min 5900 RPM Under load pump operating in relief NOTE Do not operate motor continuously for more than 5 seconds 12 Volts DC 230 Amperes Applied Voltage Max Current Draw ISKRA AMJ4739 12V No load motor not attached to pump NOTE Do not operate motor continuously for more than 30 seconds Applied Voltage 12 Volts DC Max Current Draw 150 Amperes Speed Min 3 200 RPM Under load pump operating in relief NOTE Do not operate motor continuously for more than 5 seconds 12 Volts DC 230 Amperes Applied Voltage Max Current Draw SOLENOID VALVES AND A Coil Applied Voltage 12 Volts DC Current Draw 1 2 Amperes Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal coil cover 9 6 ohms 1096 Plastic cover Coil 10 0 ohms 1096 B and C Coils 12 Volts DC 1 24 Amperes Applied Voltage Current Draw Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal coil cover 3 73 ohms 3 SOLENOID SWITCH Applied Voltage Max Current Draw 12 Volts DC 5 Amperes Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal foot 2 65 to 4 5 ohms HYDRAULIC SPECIFICATIONS PUMP Pressure Output
21. and lowers plow hydraulically 2 way and is used with HM series Snow Plows E 47 E 57 Raises lowers and angles plow hydraulically 7 way and is used with TM ST and C series Snow Plows E 47H E 57H Raises lowers and angles plow hydraulically 7 way and is used with the MDII HM and Diamond series Snow Plows Model Identification and Serial Number Location Inclusion of the model number and serial number is extremely important when writing up warranty claim forms and product report forms for proper evaluation and follow up The basic model number is located on the name plate located as shown in Figure 0 1 To determine whether itis the standard or H model measure the dimension shown in Figure 0 1 The serial number is located on the bottom of the base or on the name plate NAME PLATE n I 5 5 I 28 a NXKXX SERIAL NUMBER FRONT SIDE FRONT VIEW FIGURE 0 1 2 Motor Identification Three different brand motors are used on the Electro Lift amp units American Bosch Prestolite and Iskra Proper identification of the brand and supplier part number is necessary when seeking local parts and service sources The motor with which a specific Electro Lift unit is equipped can be identified by the distinctive characteristics shown in figure 0 2 DOMED COMMUTATOR END COVER STEEL STAMPED PRESTOLITE MKW 4007 12V t 8 gt 2 FL
22. angling cylinder When the crossover relief valve functions in this manner the excessive pressure is released the excessive energy produced by the impact is absorbed and the result is only a change in angled position of the plow The crossover relief valve may be adjusted to the specified pressure of 3800 P S I 400 by turning the 3 8 hex cap screw after installing a suitable pressure gauge of 4000 P S I in the circuit TIGHTEN TURN IN ADJUSTMENT SCREW TO INCREASE PRESSURE See Figure 3 63 Disassembly Reassembly figures 3 42 thru 3 62 SWITCH Models E 46 and E 46H A single three position toggle switch is used on the E 46 and E 46H models The positions are Off Center Position Raise Up Position Lower and Float Down Position In the off position the switch conveys no current In the raise position the switch conveys current to the solenoid switch When released an internal spring returns the toggle to the off position In the lower and float position the switch conveys current to the Solenoid Valve When released the toggle will stay in the lower and float position The toggle must be manually returned to the off position SWITCHES Power Angling Models Dual Switch Control Two three position toggle switches are used on the E 47 and E 47H models The first to raise and lower the plow has the same positions as the toggle switch used on the E 46 and 46 models However
23. emoved from valve body plug FIGURE 3 24 FIGURE 3 25 Pilot check ball removed This is a 3 8 diameter steel ball There are two filters on E A7 and E 47H and one on E 46 and E 46H units Remove filters with an 11 16 wrench 39 DISASSEMBLY ALL MODELS FIGURE 3 26 FIGURE 3 27 Filters removed soak in kerosene before reassembling Before removing ram and piston assembly extend rod fully This drains out remaining oil in cylinder FIGURE 3 28 FIGURE 3 29 When disassembling the reservoir cylinder assembly use a Cover is removed from reservoir using a large screw driver 1 2 hex socket to remove the lock nuts The studs usually and hammer or mallet as shown tapping lightly around the unscrew from the base with the nuts top cap 40 FIGURE 3 30 FIGURE 3 31 Remove ram and cylinder assembly from reservoir then pull Remove nuts baffle and retainer rings from studs and screw ram out of cylinder Worn packing cup on piston should be the studs into the base Clean reassemble Sump Base 30 replaced if cloth backing is visible in reverse order REASSEMBLY ALL MODELS NOTE Notch on the washer to be on underside FIGURE 3 32 FIGURE 3 33 Clean all paint from ram then slide the cylinder over the ram Install cylinder assembly carefully being certain it seats piston assembly using a rubber or leather mallet squarely on ring in base Assemble O Ring 13 and Washer 21 as shown 41 REASSEMBLY
24. ic system The basic operating principles of the hydraulic pump used in the Electro Lift units are quite simple Figure 1 7 illustrates the basic components of a positive displacement gear type pump and their functions The pumping action takes place within the pump chamber which is connected to the reservoir by the intake line The pump chamber has an outlet line in which the liquid under motion and pressure leaves the pump to perform work RESERVOIR ELECTRAC MOTOR INTAKE DRIVEN GEAR DRIVE GEAR PUMP CHAMBER PUMP HOUSING FIGURE 1 7 PRESSURE RELIEF VALVE A basic pressure relief valve is shown in Figure 1 8 It consists of a poppet valve and a valve spring Both are located in a passage which connects the inlet passage to the outlet passage The poppet valve is normally held closed by the valve spring sealing the connecting passage from the pressurized outlet passage The poppet valve being a piston is exposed to the pressurized hydraulic fluid in the outlet passage Whenever the hydraulic pressure against the poppet valve becomes greater than the pressure being exerted on the poppet valve from the opposite direction by the valve spring the poppet valve will open This allows some of the pressurized hydraulic fluid to flow through the connecting passage to the non pressurized inlet passage The effect is to lower the pressure in the outlet passage which will allow the valve spring to close
25. id is required Two different brand motors were used While they are interchangeable and have nearly identical performance characteristics they have distinctive design differences American Bosch The American Bosch motor is a four pole permanent magnet motor which consists primarily of a 3 diameter solid steel frame armature brushes and ceramic permanent magnet fields Because the fields are permanent magnets they do not require electrical current to operate Therefore the motor requires lower amperage to produce a given amount of power Electro Lift units equipped with an American Bosch motor cannot be used on vehicles with a positive ground electrical system since the motor will rotate backwards Positive ground vehicles will require modification of the brush assembly Prestolite obsolete MOTOR 4 1 2 E 57 E 57H Iskra Single and Two terminal The Iskra motor is a four pole electromagnet motor which consists primarily of a 4 1 2 diameter solid steel frame armature brushes field coils and pole pieces This motor can be used on vehicles with either the common negative ground electrical system or the positive ground electrical system HYDRAULIC PUMP The pump in a hydraulic system employs an external source of power to apply a force to a liquid A pump develops no power of its own It simply transfers power from an external source the electric motor on the Electro Lift unit to the liquid in the hydraul
26. is removed using a 7 8 or 1 1 8 hex The Cartridge is removed Clean screen by soaking deep socket cartridge in cleaning solvent E 46 amp E 46H ONLY FIGURE 3 12 FIGURE 3 13 End plate is removed by using a 1 4 hex key on the four Remove and Coil by using a 7 16 Wrench on the Socket head screws Note orientation of plate to the unit retaining nuts this is critical when assembling 36 DISASSEMBLY 47 E 57 MODELS FIGURE 3 14 FIGURE 3 15 Coils removed from cartridges A special hex socket part number 21891 may be required to remove and Cartridges See Figure 3 67 FIGURE 3 16 FIGURE 3 17 amp C Cartridge being removed from valve block Clean A magnetic probe is extremely useful for removal of small cartridges by soaking in kerosene valve parts This is the 7 16 check ball for Cartridge being removed 37 DISASSEMBLY 47 amp E 57 MODELS FIGURE 3 18 FIGURE 3 19 B Cartridge check spring removed Use a 13 16 Hex Socket to remove pilot valve plug FIGURE 3 20 FIGURE 3 21 Pilot check piston being removed Handle piston with care The valve body can be removed from unit using If piston is scratched or damaged it must be replaced a 1 4 hex key or Allen Socket 38 DISASSEMBLY 47 amp 57 MODELS FIGURE 3 22 FIGURE 3 23 Use a 1 4 hex key or Allen Socket to remove pilot valve Pilot check spring being r
27. k plug Coil The Coil is the electrical component which operates the Cartridge s valve mechanism by producing magnetism which pulls the Cartridge s armature toward it Since the armature is connected to the valve mechanism s only moving part it is pulled by the armature Figure 1 9 illustrates the typical Coil Whenever electrical current flows to the Coil it flows through the winding which consists of numerous turns of copper wire The flow of current through the winding produces a magnetic field which pulls the soft iron armature further into the Coil The armature pulls the valve spool or poppet valve into its alternate energized position Not illustrated is an integral coil spring which is compressed when the armature is pulled by the magnetism When the current flow ceases the magnetic field disappears and the compressed coil spring pushes the armature back to its original de energized position 20 FIGURE 1 9 Solenoid Valve The Solenoid Valve is used in all Models The A Cartridge contains a poppet valve whose static or de energized position is closed Its energized position is open On all four models the Solenoid Valve retains hydraulic fluid in the lift cylinder It is energized opened to allow the hydraulic fluid to flow from the lift cylinder back to the reservoir enabling the plow to lower by gravity The Solenoid Valve is designed to remain energized
28. ludes items A B D M 38 15574 15574 1 Pump Check Valve Kit 75 21826 21826 4 Soc Head 5 16 18 x 1 1 2 39 15124 15124 1 O Ring 3 8 I D 40 1 Seat 41 1 Ball 9 32 42 1 Spring Parts indented are included in assembly under which they are indented Parts included in Master Seal Kit Part No 15888 Basic Seal Kit Part No 15254 Pump Relief Valve 2000 5 full flow Non Adjustable Set Crossover Relief Valve 3800 400 5 2 1 2 G PM 33 DISASSEMBLY ALL MODELS FIGURE 3 2 FIGURE 3 3 To drain oil from the unit remove the drain plug using a Drain Plug removed 11 16 wrench E 46 E 46H amp E 47 E 47H ll 1 46 E 46H amp E 47 47 FIGURE 3 4 FIGURE 3 5 To replace the motor remove the two cap screws use a Hold the motor parts together while removing it from the 10mm hex socket on the E 57 and a 3 8 hex socket on the pump E 46 and E 47 34 DISASSEMBLY ALL MODELS E 46 46 E 47H FIGURE 3 6 FIGURE 3 7 To remove the pump E 57 use a 1 4 Allen socket on the Pump removed from the unit base three bolts E 46 and E 47 use a 1 2 hex socket on the three locknuts The studs usually unscrew with the nuts FIGURE 3 8 FIGURE 3 9 Remove the A Coil using a 3 8 or 1 2 wrench Coil removed from the Cartridge 35 DISASSEMBLY ALL MODELS FIGURE 3 10 FIGURE 3 11 The Cartridge
29. m leaking back to the reservoir The second is to allow the hydraulic fluid from the retracting power angling cylinder during the angling cycle to return to the reservoir This is accomplished by the pressurized hydraulic fluid moving the piston which forces the check ball off its seat CROSSOVER RELIEF VALVE When plowing snow a snow plow can be exposed to damaging forces caused by impact with hidden obstructions ends of curbs etc With power angling these damaging forces can damage not only the snow plow but also the vehicle The crossover relief valve has the function of protecting the snow plow system against these damaging forces under normal snow plowing conditions The crossover relief valve cannot protect the system from damaging forces that are too great due to abusive snow plowing conditions Basically the crossover relief valve functions exactly like the previously described pump relief valve It s designed to open at a specific pressure 21 In this instance the pressure is not produced by the pump but rather by the damaging force As an example assume that the right corner of the plow runs into the end of a curb The impact will attempt to collapse the right power angling cylinder As a result very high hydraulic pressure is produced within the cylinder When the produced pressure is high enough it opens the crossover relief valve allowing the highly pressurized hydraulic fluid to flow directly to the left power
30. nc reserves the right under its continuing product improvement program to change construction or design details specifications and prices without notice or without incurring any obligation SECTION GENERAL INFORMATION AND MAINTENANCE CONTENTS GENERAL INFORMATION 2 e MODEL IDENTIFICATION eee 2 e MODEL IDENTIFICATION AND SERIAL NUMBER LOCATION 2 e MOTOR IDENTIFICATION 2 MAINTENANCE ope OS rece e 2 e GENERAL MAINTENANCE 2 LIE CGLEANEINESS T 2 e VEHICLE ELECTRICAL SYSTEM 3 CHECK HEGUDAREF bdo bebe teet og enda 3 POST SEASON MAINTENANCE 3 e Mever HYDRAULIC FLUID 1 3 REPLACEMENT OF HYDRAULIC FLUID 3 xIPIBIEHS Quay 3 e PROTECTION AGAINST Rust AND CORROSION vu ccccecececceceeeeecececeseeeeeeeneeeeeeenenenenenaees 3 GENERAL INFORMATION Model Identification The Electro Lift unit is an electrically powered hydraulic mechanism specifically designed for use with the Meyer Snow Plow and is available in four models as follows E 46 Raises and lowers plow hydraulically 2 way and is used with TM ST and C series Snow Plows E 46H Raises
31. ng The control knows when a short or an open connection occurs and will go into overload mode for the function being activated To reset the controller turn the switch on and off The Electro Touch Control will not operate if not wired properly Controller must be grounded Orange wire from switch harness attaches to the negative terminal of the battery Reference Form 1 795 for wiring diagram 3 When determining AMP draw of the motor always obtain the highest value possible i e at maximum raise or maximum angle with motor running 4 Proper rotation for the 3 motor American Bosch is indicated by an arrow located on top side of the Part 15026 pump 5 The pump shaft of a good pump can be turned smoothly using two fingers If it can t be turn easily the pump is too tight and must be replaced 6 Pump pressure can be measured at an angle hose note pressure at full angle or in the pressure filter port an adaptor is neces sary for the filter port Note The E 57 Electro Lift Unit has a non adjustable pressure relief valve 7 Flush the complete system including unit hoses and power angling rams with Meyer Hydra Flush Fluid M 2 To kpralion Switch Fuse Accessory Side T F i Motor Solenoid 22092 b grounded uno 1 lt Pressure Relief _ Positive Filler Plug am n Battery Terminal d La gt A jl Ground 7 Coupler F
32. ooth side up FIGURE 3 59 FIGURE 3 60 Assemble Spacer 56 Reassemble Spring guide 54 smooth side down 48 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 61 FIGURE 3 62 Reassemble Spring 55 Reassemble Plug 58 with Adjusting Screw 59 and disc 57 properly adjust the Crossover Relief Valve refer to 21 Push leading edge of the Moldboard against an immovable object until Crossover Relief Valve opens 3800 5 400 Reassemble Acorn Nut 61 and O ring 60 FIGURE 3 63 49 BRUSH REPLACEMENT OF AMERICAN BOSCH MOTOR FIGURE 3 64 FIGURE 3 65 A special tool figure 3 69 is required to hold brushes in motor Once top cap is positioned over armature shaft carefully top cap as shown slide tool out while pushing down on cap BRUSH REPLACEMENT OF ISKRA MOTOR FIGURE 3 66 Remove motor from hydraulic unit Remove top cap from motor housing To replace brushes part 15854 start by pushing each brush assembly towards the commutator Remove old assembly from the insulated mounting plate removing retaining screws Replace with a new brush assembly by reversing the above procedure It is recommended that each brush be changed in turn to avoid confusion make sure that each brush assembly is replaced with the correct part that has the brush cable on the the same side Service Kits consist of 2 matching pairs of brush assemblies 50 BRUSH REPLACEMENT American Bosch Brush Replacement 1
33. open while the plow is lowered plowing snow This is the float feature which insures that the plow maintains contact with the ground contour B Solenoid Valve The Solenoid Valve is used on the Power Angle Electro Lift models The Cartridge contains spool valve whose static de energized position allows the pressurized hydraulic fluid to flow to the C Solenoid Valve In the energized position the pressurized hydraulic fluid is diverted to the lift cylinder raising the plow Solenoid Valve The Solenoid valve is used on the Power Angle Electro Lift models The C Cartridge contains a spool valve whose static de energized position allows the pressurized hydraulic fluid to flow to the right power angling cylinder which angles the plow to the left At the same time it allows the hydraulic fluid being forced from the retracting left power angling cylinder to flow through the C Cartridge back to the reservoir In the energized position the pressurized hydraulic fluid is diverted to the left power angling cylinder angling the plow to the right Also the hydraulic fluid being forced from the retracting right power angling cylinder flows through the C Cartridge back to the reservoir ELECTRO LIFT UNIT COMPONENTS CONT CHECK VALVES Check valves are very simple devices that have two basic functions They prevent fluid from passing through them in one direction but they allow fl
34. opriate American Bosch or Prestolite authorized service station in your area for all parts and service with the exception of brush replacement Procedure for American Bosch motor brush replacement is covered separately in this section Disassembly See Figures 3 2 through 3 11 pages 34 36 Figures 3 25 through 3 31 pages 39 41 for important disassembly points on any of the four models See Figure 3 12 page 36 for important disassembly points on the E 46 and E 46H models See Figures 3 13 through 3 24 pages 36 39 for important disassembly points on the Electro Lift units See Figures 3 42 through 3 48 Pages 44 45 for Crossover Relief disassembly ds Reassembly See Figures 3 31 through 3 41 pages 41 43 for important reassembly points on any of the four models See Figures 3 49 through 3 62 Pages 46 49 for Crossover Relief reassembly Additional Reassembly Points O Rings Coat liberally with hydraulic fluid and position carefully to minimize possibility of damage during assembly Fasteners Torque all fasteners which are specified to insure proper reliability and prevent damage due to over tightening PUMP Shaft Seal Replacement NOTE Do not disassemble pump assembly 1 Remove motor as shown in Figures 3 4 and 3 5 page 34 2 Using an appropriate tool pry out the original shaft seal being careful not to damage the shaft or pump housing 3 Liberally coat the replacement seal 1 0 with hyd
35. ral valve body which contains two additional electrically controlled solenoid valve cartridges Solenoid valve cartridge is energized to route the pressurized hydraulic fluid to the integral hydraulic cylinder to raise the plow Solenoid valve cartridge C is energized to route the pressurized hydraulic fluid to the left remote hydraulic cylinder to angle the plow to the right Angling the plow to the left only requires energizing the electric motor since the normal route forthe pressurized hydraulic fluid is to the right remote hydraulic cylinder Additional components which control and supply electrical current to the Electro Lift unit are an operator controlled toggle switch a solenoid switch to supply high amperage current to the unit s motor a wiring harness to distribute low amperage current between the toggle switch or switches motor solenoid and the solenoid valve cartridge s and short heavy gauge cables to distribute high amperage current directly from the positive terminal of the vehicle s battery and ground the unit directly to the negative terminal of the vehicle s battery THEORY OF OPERATION FUNCTIONS The Electro Lift models perform basic functions Because certain of these basic functions are accomplished differently in the models E 46 and E 46H as opposed to the Power Angling models will be treated separately where necessary Models E 46 and E 46H The two basic functions performed are Raise snow plo
36. raulic fluid and apply a very light film of Permatex Form A Gasket No 2 or equivalent to the replacement seal O D 4 Carefully slide the replacement seal metal side up over the shaft until it is squarely against the pump housing 5 Center a 11 16 hex deep socket over the seal and use it and a plastic or leather mallet to squarely drive the seal into the pump 6 Replace the motor as shown in Figures 3 39 through 3 40 page 43 ELECTRO LIFT Exploded View autian Uie 47 cross over ralied any a O ring BB 5 nomal atomot 0 A seepage by tm Motors extra ma be drilled and pal PARTS BREAKDOWN E 46 E 47 amp 47 E 57 amp E 57H ELECTRO LIFT PARTS LIST STANDARD LONG STROKE STANDARD LONG STROKE UP THROUGH HM 9 amp HM 10 UP THROUGH HM 9 amp HM 10 9 ONLY 9 ONLY ITEM 1 1 8 x 6 Stroke 1 1 8 x 8 Stroke QTY DESCRIPTION ITEM 1 1 8 x6 Stroke 1 1 8 x 8 Stroke QTY DESCRIPTION E 57 E 57H E 57 E 57H 15865 15866 1 Lift Ass y Unit only 12 volt 43 15122 15122 3 O Ring 1 4 1 0 15881 15885 1 Lift Ass y Unit only 24 volt 44 21999 21999 1 Drain Plug w O Ring 9 16 1 15869 15869 1 Pump amp Motor Assy 12 volt 45 15127 15127 1 O Ring 5 8 1b 15890 15890 1 Pump amp Motor
37. ressure Relief Valve Kit 58 1 ee Spring 18 21805 21805 1 Reducer Bushing 1 4 x 1 8 59 1 ee Plug 19 21806 21806 1 Pressure Relief Valve 60 15609 15609 1 Piston 20 15207 15205 1 Oylinder 61 15359 15359 1 Plug Valve Block 21 15209 15209 1 Washer Grooves Down 62 15126 15126 1 ee O ring 9 16 22 15335 15761 1 Ram Assembly 63 15697 15697 1 Solenoid Assembly 23 15208 15206 1 Ram 64 15382 15382 1 ee B Coil Red Wire 24 15158 15158 1 Piston 15444 15444 1 ee Coil Red Wire 24V 25 15219 15219 1 Piston Follower 65 15698 15698 1 B Cartridge Valve 26 15760 15760 1 Spacer 66 15432 15432 1 ee Seal Kit B Cartridge 27 15162 15162 1 Packing Cup 67 15576 15576 1 Kit B Check Valve 28 15125 15125 1 e O Ring 7 16 I D 68 1 ee Ball 7 16 29 20316 20316 1 Locknut 1 2 13 69 1 ee Spring 30 15573 15573 1 Base amp Strainer Assy 70 15358 15358 1 Solenoid Assembly 31 15326 15326 1 Strainer 71 15430 15430 1 C Coil Green Wire 32 15641 15641 2 e Filter Kit 9 16 15445 15445 1 C Coil Green Wire 24V 33 15619 15619 1 ee Filter 72 15381 15381 1 C Cartridge Valve 34 21999 21999 1 Plug w O Ring 9 16 73 15433 15433 1 ee Seal Kit C Cartridge 35 15042 15203 3 Stud 74 15606 15606 1 Kit Crossover Valve 36 15621 15621 1 Baffle 7 15610 15610 1 Seal Kit Crossover Valve 37 21980 21980 2 Retainer Ring inc
38. roximately 030 Jamming of the poppet due to metal chips or other contamination can usually be eliminated by immersing the entire cartridge in clean kerosene and pushing the poppet in and out with a probe until it moves freely Dry with compressed air and reinstall In the event jamming cannot be eliminated replace the cartridge B and C Cartridges NOTE Cartridges without a hex nut must use special tool No 21891 to remove and reinstall the B and C Cartridges See Figure 3 67 When jamming of the spool occurs attempt to eliminate it using the method described under Cartridge before disassembling it The B and C Cartridges can be disassembled by removing the internal retaining ring When operating normally the spool can be pushed in approximately 070 However it is generally a better use of one s time to replace the cartridge In the event jamming or some other malfunction cannot be eliminated replace the cartridge since individual parts for it are not available SPECIAL TOOLS Crossover Relief Valve Inner Harden Steel Wire from a Throttle Choke cable FIGURE 3 67 B and Cartridge Tool 21891 FIGURE 3 68 pw Liar 11 O28 A Places 1 40 Bere Apis cms 158 Trig FIGURE 3 69 Brush holder tool for American Bosch Motor 52 SPECIFICATIONS ELECTRICAL SPECIFICATIONS MOTOR American Bosch M0551046A No lo
39. t HILING Cu HIVO N3110M1NOO N3A31 319NIS YATIONLNOS MILLS MIIS HONOL 0319373 10 IYN 18 3 1 3 6130004 RIA 1HVH2 DIINVYJAH uaNNals aL gavi SEIS M3ONIA2 1 11 ONIIONY l z YOJH 0 0002 OJ3ZIOH3N3 15 3 TS os 0591 TT irg GION41058 IOION310S Jar T38 b 4 JHNSS3Hd Lr W aug Week 38914 38 0814 E MEL TONTOS 0043705 area HOLS QL HAMOA 9 ue 4311041NO2 ERE 319NIS YaTIONLNOD MILS MI1S HONOL 0410414 2492 IVO 13 H3MOT1 46 3 27 3 S14GOW 8t L 3tin ld LAVHO H3NIVHIS NIVHO 20 AO P Nunia ONILvH3do Td 0085 tos III LJ UNIUS 323H2 H3ONIIAD 10114 n TA QION310S JION3TOS 13 UTA vs L June JAM 3078 EU HQLMEOLWAWOJ dA TIOHLINOO STONIS 1IOHLNOD MILS HITS HONOL OH1I23 13 14 LHDIH 3 19NV 99 1 18 39 1 3 STAGOW LHVHD 9I In VHOAH NIWHG 3WeLNI D s Td 00 008
40. tions The up arrow for raise the left arrow for angle left the right arrow for angle right and the down arrow for lower or float Holding the down arrow for a full second will activate a light located in the upper left corner of the Electro Touch switch This light indicates the snow plow is now in the float position In this position the snow plow will be able to follow the contour of the road and the snow plow can also be angled to the left or right Touching the up arrow will automatically cancel the float position This switch is short circuit open circuit and temperature protected If any of these conditions exists the overload light will illuminate The overload light is located just below the float light in the upper left corner of the Touch Pad Reset is accomplished by cycling the power to the Touch Pad via the on off switch located to the left of the cord as it enters the Touch Pad 22 CAUTION When the snow plow is not in operation the Electro Touch Control Switch should be in the OFF position SOLENOID SWITCH The Electro Lift motor requires more current or amperage to operate than the vehicle wiring vehicle ignition switch or toggle switches have the capacity to handle The solenoid switch is essentially a heavy duty switch with the capacity to handle the heavy current required by the motor It is closed electrically by the solenoid to convey the heavy current directly from the vehicle battery via heav
41. uid to pass through them in the opposite direction In all four Power Angling models a pump check valve is used to prevent hydraulic fluid from leaking back through the pump to the reservoir Its function on the E 46 and E 46H models is more critical since it is the only means by which pressurized hydraulic fluid pumped into the lift cylinder is prevented from leaking out through the pump causing the plow to slowly come down The E 47 and E 57 models incorporate two additional check valves necessary because the B and C Solenoid Valves being spool valves have some leakage One check valve is located between the B Solenoid Valve and the lift cylinder It prevents the hydraulic fluid in the lift cylinder from leaking back through the B Solenoid Valve which could cause the weight of the plow to angle the plow to the left by forcing hydraulic fluid through the C Solenoid Valve into the right power angling cylinder The other check valve is located between the B and Solenoid Valves It prevents the hydraulic fluid in either power angling cylinder from being forced through the B Solenoid Valve to the left cylinder PILOT CHECK VALVE The pilot check valve is more sophisticated in that it incorporates a piston in addition to the ball seat and spring It is located between the Solenoid Valve and reservoir It has two functions The first is to prevent the hydraulic fluid in either power angling cylinder fro
42. w Lower snow plow and float Refer to Figures 1 1 and 1 2 pages 6 thru 9 for electrical and hydraulic flow chart for each function Each figure explains which component is actuated and related in each function Models E 47 E 47H and E 57 E 57H The four basic functions performed are Raise snow plow Lower snow plow e Angle snow plow to right Angle snow plow to left Refer to Figures 1 3 through 1 6 pages 6 thru 18 for electrical and hydraulic flow chart for each function Each figure explains which component is actuated and related in each function aASIVa HOLIMS QION310S Ad311V8 e H21IMS H31IMS 6 ASIVa H9t 3 97 3 STSGOW LHVHO Or In vHOAH JMYLNI NYNLSY KZ DNILYHJdO 38n9ol3 m BION m EE TSd 05 0991 H8t 3 331135 34M1SS3Hd 1VO 13 43M01 H21IMS lION310S 11 8 e HOLIMS NOILIN9I 8 3sIVH H LIMS 8 IVO 14 H3MO 1 8 97 3 S140OW LYVHD NIVHOJO3WVINI Nn SNIvH3dO 92 1 34ND 1759 05 0591 s 9 8 431138 3gnss3sd _ 1 9 WE L 3ung8i a ERU ep ownowo a L zu A Sed 3T T8 GNOME HILM lt g
43. y gauge electrical cable The solenoid which functions essentially the same as the previously described solenoid valves receives its low amperage current at the proper times via the wiring harness This solenoid must be grounded to operate properly FILTERS Cleanliness is perhaps the single most important ingredient in assuring a hydraulic system s reliability Should the hydraulic fluid become contaminated malfunction and permanent damage to the hydraulic system may occur For this reason all the Electro Lift units are equipped with a filter system consisting of E 47 E 57 E 47H E 57H X X A fine screen strainer on the reservoir pump inlet X X A filter screen between the lift cylinder and Solenoid Valve X A high pressure filter on the pressure side of the pump With this system the hydraulic fluid is filtered as it leaves the reservoir on its way to the pump and on the Power Angling units filtered again as it leaves the pump Because clean hydraulic fluid is most important to insure A Solenoid Valve reliability the hydraulic fluid leaving the lift cylinder is filtered before passing through the A Solenoid Valve The filter screen and high pressure filter are easily removed for periodic cleaning or replacement NOTE Additional filter screens are added to the and Cartridge Valves IMPORTANT Should the hydraulic fluid become contaminated it will be necessary to repl
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