Kunz MR44B User's Manual
Contents
1. 44 ROUGH CUT OWNER S MANUAL With Assembly Instructions For Models MR44B amp MR44K KUNZ ENGINEERING INC MENDOTA IL 61342 PH 815 539 6954 3 4 1 09 gt gt SAFETY INTRODUCTION Your safety and the safety of others is very important To help you make informed decisions about safety we have provided operating procedures and other information on labels and in this manual This information alerts you to potential hazards that could hurt you or others You will find important safety information in a variety of forms including Safety Labels on the mower Safety Messages preceded by a safety alert symbol A and one of three signal words DANGER WARNING or CAUTION These signal words mean DANGER Indicates an imminently hazardous situation that if not avoided will result in death or serious injury This signal word is to be limited to the most extreme situations typically for machine components which for functional purposes cannot be guarded WARNING Indicates a potentially hazardous situation that if not avoided could result in death or serious injury and includes hazards that are exposed when guards are removed It may also be used to alert against unsafe practices CAUTION Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices This entire manual is filled with i2. 1 2 hex head bolts and lock nuts provided on the pivot arms Note Tighten 1 2 x 3 1 2 hex head bolts until just snug This area needs to pivot when adjusting the height Under tightening can result in excessive wear and flexing Over tightening will make adjusting the cutting height very difficult Carrier Arm Assy Front Rubber SS S D gt 1 2 x 3 1 2 Bolt Flap Side Pivot Arm Rear Tire Assy Attach on outside for both left and right sides Figure 2 Carrier Arm Installation INSTALLATION OF CROSS BRACE TUBES AND HEIGHT ADJUST ASSY For this section if your mower was purchased with an Electric Lift Kit Part 003912 refer to Section C of the Electric Lift Kit Owner s Manual Remove the 1 2 x 3 hex head bolts lock washers and nuts that are located on the top of each carrier arm four per carrier arm The removed hardware will be used in step 2 Install the cross brace tubes on the carrier arms with the 1 2 x 3 hex head bolts lock washers and nuts Only hand tighten the hardware for this step The support that has the height adjust assy fastened to it needs to be placed on the rear location Orientate the support such that the height adjust assy hangs towards the engine See figure 3 Remove the 1 2 x 1 bolt and lock nut from the lower deck mount Manually turn the screw down towards the deck until the screw mounting flat hole lines up with the lower deck mount hole After a
3. Do not fill fuel tank while engine is running or hot WARNING Keep all safety shields and deflectors in place during operation CAUTION Remove grass build up from under safety shields before each use Do not remove safety shields while engine is running Dry grass build up around belts and sheaves can cause fires WARNING Shut off engine before disconnecting the mower from the tow vehicle or attempting to move the wing mower by hand WARNING Never carry children or passengers WARNING Do not allow children to operate this machine CAUTION Slow down and watch the ends of the mower when making turns so objects are not struck and or run over WARNING Look down to the sides and behind before and while backing to avoid backing over something or someone Care should also be taken while backing so that the wing mower or mowers do not jackknife and damage hitches WARNING Stop the mower blades on the mower if the tow vehicle becomes stuck or stops going forward because of loss of traction Shut off the engine on the mower before attempting to push or pull the tow vehicle Listen to the rough cut mower engine while mowing The engine should run free and not work too hard Working the engine too hard will cause overheating and premature failure CAUTION If the mower s engine dies while in use remove the rough cut mower from the uncut area before attempting to engage the clutch Inspect the blades for any obstructions that may prevent
4. blade engagement Failure to follow these instructions may result in premature belt failure or a fire Do not allow material to build up on the air inlet to the engine cooling system Special care should be taken to make sure the engine is getting enough inlet air Do not allow the engine cooling fins under the shroud to be blocked If air flow over the engine is restricted the engine could overheat F DRIVE BELT REMOVAL AND TENSION Refer to Figure 10 WARNING Shut off engine and allow mower blades to stop turning before making any adjustments or repairs Remove the safety shields Loosen the nuts on the spring loaded idler adjust bolt until the belt can be slipped off the idler and drive sheaves Slip the belt down under the drive sheave and off the blade spindle sheaves Install the new belt and then adjust the tension as follows See Figure 10 Take special care to make sure that the belt is placed between the brake stud and the idler pulley Only Include Spring in Measurement Clutch Engagement Clutch Arm oe amp a et Clutch Engaged 91 to 3 1 4 Clutch Disengaged Spring Length 3 1 4 to 4 No Less Than 1 2 Clearance With Brak d ante Clutch Engaged 0 With Clutch Disengaged Figure 10 Belt Pattern Spring Adjustment and Brake Adjustment 13 With the clutch engaged adjust the nuts on the spring loaded idler adjuster bolt until the length of the spring is approximately
5. follows 1 Pull the mower on to a smooth level surface 2 The desired cutting height can be determined by measuring the distance from the ground to the outside lower edge of the mower deck and adding 1 5 16 The mower blade cutting edge is 1 5 16 above the outside lower edge of the mower deck Note lf the height adjust crank does not turn easily the pivot bolts holding the carrier arm assemblies and height adjust screw may be too tight Loosen the pivot bolts slightly to allow easier pivoting Care should be taken not to loosen too much or excess wear and flexing may occur Greasing the threads on the height adjust screw may also allow greater ease in adjustment Note After setting the initial cutting height quick field adjustments can be completed by counting crank turns Roughly 8 turns will equal 1 of vertical movement The adjustment crank may unturn due to vibration This will allow the mower s cutting height to change The crank can be secured by folding it down between the adjustment nut tube and the height adjust support See Figure 9 Adjustment Crank Adjustment Nut Tube Height Adjust Support Figure 9 Securing Crank While Not In Use C STARTING ENGINE A WARNING Set parking brake on tow vehicle Attach mower tongue to tow vehicle A WARNING Do not start rough cut mower unless it is attached to the tow vehicle Turn on fuel shut off valve which is located on the underside of the gas tank Set the choke
6. 2 3 4 This is the initial belt break in spring length When the belt is broken in after several hours of mowing the running spring length should be between 2 3 4 and 3 1 4 For maximum belt life periodic checks every 3 4 hours should be done to make sure the spring length has not exceeded the recommended running length Note Failure to periodically adjust the belt tension will result in severe belt wear and premature belt failure This model comes with a belt brake which is a safety feature that stops the blades from turning after the clutch is disengaged The only time the brake should be in contact with the belt is when the clutch is disengaged CAUTION The brake stud may need to be adjusted if there is significant belt wear or if a different size belt is used If the brake stud is not adjusted correctly the blades will still spin even though the clutch may be in the disengaged position Always shut mower engine off before servicing Under normal operating conditions and when using the Kunz Engineering belt Part 238007 the brake stud should require very little adjustment Periodic brake stud inspections should be performed every 10 hours In more severe cutting conditions more frequent inspections may be necessary There are two parts to inspecting the brake stud Those two inspections are the disengaged spring length and brake stud clearance Note It is quicker to perform the disengaged spring length and brake stud clearanc
7. 342 815 539 6954 ASSEMBLY INSTRUCTIONS Read the complete assembly instructions before starting the assembly You should have one mower deck assembly two carrier arm assemblies two rear tire assemblies one front cross brace tube and one rear cross brace tube with height adjust assy one ATV tongue assembly A ASSEMBLY OF REAR WHEELS AND CARRIER ARMS 1 Set the mower deck assembly on wood blocks so that it is suspended off the ground Note The operator controls are on the front of the deck Left and right are determined by looking in the direction of travel or by standing at the rear of the deck assembly looking forward 2 Install the rear tire assemblies on the carrier arm assemblies Remove the hex nut and lock washer from the rear tire assembly and install the 5 8 x7 1 2 tire axle bolt through the hole in the carrier arm assembly See figure 1 Secure assembly with the lock washer and hex nut provided on the rear tire assembly The rear tires should be offset to the outside of the deck assembly on both sides See figure 2 Carrier Arm Rear Tire Assembly Hex Nut and Lock Washer Cup Washer Flat Washer Figure 1 Rear Tire Assembly Installation 3 Install the two carrier arm assemblies in the pivot arms which are located on the mower deck assembly Place the assembly so that the castered tires are on the front and the fixed tires are on the back See figure 2 Secure with 1 2 x 3
8. 600254 600264 600265 600268 900023 900049 900058 900061 900079 900082 900148 900150 900151 900153 Description Safety Belting Battery Box Spacer Belt Sheild Left Belt Sheild Right Height Adjust Support Control Panel Battery Box Assy Hitch Pivot Pivot Arm Tank Support Tongue Caster Fork Engine Support Bracket Clutch Arm Idler Arm Assy 243005 Bronze Bearing 1 2 1 D x 3 4 O D x 3 4 Long 900154 900155 900156 900157 900158 Upper Actuator Mount Carrier Arm Mower Deck Height Adjust Nut Screw Adjuster 18 Quantity 2 a NNN HH HHi eH pd ld 4 dodo po ACREASE 44 ROUGH CUT MOWER PARTS VG 7 a OPTIONAL EQUIPMENT OPTIONAL WETLANDS KIT The optional wetlands kit features an extra set of tires for added ground support in soft or water saturated areas The following are applications and features that the wetlands kit works best in Great for wetlands or marshy areas that stay wet all year around Works well in combination with small personal amphibious vehicles or tracked ATVs More than doubles the tire surface area in contact with the ground Very easy to install bolt on kit Works on all existing and new rough cut mowers The rough cut mower will not float with the wetlands kit installed Water greater than 2 3 in depth should be avoided e With the Wetlands Kit installed the minimum cutting height is 3 5 4 Shown on the 57 Rough Cut Mowe
9. C B74 Carlisle Super I Flat Idler 4 O D x 3 8 Hole V Sheave 5 Dia 1 Bore Plastic Bearing 1 3 8 O D x 1 00 1 D Flange Nylon Spindle Assy Spindle Shaft 1 Housing Assy With Two Bearings 1 243006 Bearing 6206 w Trash Guard Seals 2 600271 Bearing Spacer 3 33 Long 1 241011 259008 264000 264001 264010 264003 269000 269004 269001 275001 275002 275003 275007 275011 275019 275021 275024 277002 277010 277011 277013 600071 600136 600146 600185 600186 600252 Sheave 5 56 Dia B Section 1 Offset Mower Blade 2 1 2 Wide 23 Long 3 4 Hole Solenoid Ignition Switch MR44K Ignition Switch MR44B Hour Tack Meter Choke Control 20 MR44B Choke Control 14 MR44K Throttle Control 15 Control Panel Decal Starting Instructions Warning Decal General Danger Decal Cut Finger Warning Decal Belt Sheild Clutch Engagement Decal Name Decal Kunz Name Decal AcrEase Name Decal 44 Rough Cut Rubber Gromet Fuel Tank 3 75 Gal Plastic Use Gas Cap 277013 Handle Grip Gas Cap For Fuel Tank 277010 Spacer 1 38 O D x 1 33 Wall x 2 19 Long Brake Stud Crank Arm Top Long Support Top Short Support Flap Retainer Strip 17 Quantity H HH DYN HANDY HAD O Ny 1 Optional gt A po Aa 0 2 S HY ND H HH HSH Item 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Part 600253
10. OUCH UP PAINT COLOR Model MR44B Briggs amp Stratton Intek AVS OHV 1 4 Vertical 17 5 3 57 3 06 30 6 cubic inches 1 5 U S qt 1 0 1 4 3 15 7 16 20 5 16 18x1 50 Through Bolt Electric Manual 3 3 4 Gal 44 10 ga Welded steel 2 to 8 Single Crank Two 15 600 x 6 Two 5 30 4 50 x 6 2 23 3500 RPM Manual 95 5 46 5 29 520 Ibs ATV Tongue Pewter Gray Krylon 1606 16 Model MR44K Kohler Command Pro CV 493 1 4 Vertical 18 3 54 3 03 29 9 cubic inches 2 U S qt 1 0 1 4 3 15 7 16 20 M8 x 1 25 25 Electric Manual 3 3 4 Gal 44 10 ga Welded steel 2 to 8 Single Crank Two 15 600 x 6 Two 5 30 4 50 x 6 2 23 3500 RPM Manual 95 5 46 5 29 520 Ibs ATV Tongue Pewter Gray Krylon 1606 z 3 0 2 14 15 16 16 17 18 18 19 20 20 20 20 20 20 20 20 21 22 23 24 25 26 27 28 29 30 ACREASE ROUGH CUT MOWER PARTS LIST Part 214021 216002 216009 222005 222012 225005 226003 226004 238007 241001 241010 243010 258023 900075 900160 Description Cup Washer Wire Lock Pin 31 x 2 50 Screw Pin Shackle Clevis Worm Drive Hose Clamp 7 7 8 to 9 1 8 Clamping Dia Single Split Collar 1 1 D x 1 2 Thick Compression Spring 4 1 2 L x 1 3 32 O D x 125 Wire dia Offset Wheel Assy 15 600 x 6 4 Ply Turf Centered Wheel Assy 5 30 4 50 6 4 Ply Stud V Belt 62 77 O
11. chieving alignment attach the screw mounting flat with the 1 2 x 1 hex head bolt and secure the bolt with the provided lock nut Do not over tighten This location must be able to pivot See figure 4 1 2 x 3 Bolt Cross Brace Height Adjust Assy Tube y Figure 3 Cross Brace Tube Installation Screw Mounting Flat Height Adjust Assy Figure 4 Height Adjust Assy Installation 4 Turn the crank on the height adjust assy and raise the mower to its highest position At this time securely tighten the 1 2 x 3 hex head bolts lock washers and nuts holding the cross brace tubes in place This step insures that proper alignment of the carrier arms has been achieved C INSTALLATION OF TONGUE ASSEMBLY 1 The tongue can be installed either on the left or right carrier arm assembly depending on how the tow behind mower will be towed See figure 5 Secure the hitch pivot on the chosen carrier arm assembly with the 1 2 x 3 1 2 hex head bolt lock washer and nut provided 2 Install the tongue into the hitch pivot and secure by placing the provided 5 16 wire lock pins on each side of the hitch pivot Note To help prevent any unwanted pin removal caused by oncoming debris install the 5 16 wire lock pins with the wire lock section back from the direction of travel See Figure 6 Hitch Pivot Attach to SN an Tongue Either Left or Right 4 Carrier Arm Assy Carrier Arm Assy Offse
12. e inspections if done simultaneously Disengaged Spring Length This inspection must be performed to make sure that there is proper braking force to prevent the blades from spinning when the clutch is in the disengaged position With the clutch in the disengaged position measure the spring length The spring must be between 3 1 4 and 4 to provide the appropriate braking force If the spring length is over 4 it will be necessary to adjust the brake stud closer to the belt If the spring length is less than 3 1 4 it will be necessary to adjust the brake stud further away from the belt To make brake stud adjustments loosen the bolt on the top of the brake stud and slide the brake stud in the slot When the proper disengaged spring length is achieved tighten the bolt on the top of the brake stud For this procedure do not adjust the spring length The spring length should only be changed when adjusting the belt tension Brake Stud Clearance This inspection is necessary to prevent over braking To inspect the brake stud clearence it is easiest to remove the left belt sheild and observe from the left side With the clutch engaged check to make sure that there is at least 1 2 of clearance between the brake stud and the belt If the clearance is less than 1 2 then it will be necessary to adjust the brake stud away from the belt Keep in mind that the disengaged spring length must stay between 3 1 4 and 4 Note lf the brake stud
13. in shackle clevis to provide movement in all directions on rough uneven ground To prevent loss of the screw pin due to vibration or debris place the screw pin through the tow vehicle hitch and clevis and turn the screw pin until snug The tongue is designed to adjust from left to right within the hitch pivot This allows the mowers position to be varied behind the tow vehicle This is accomplished by pulling the 5 16 wire lock pins out and choosing two other hole locations on the tongue See Figure 6 a a Directly Behind Offset Figure 7 Rough Cut Tow Behind Towing Suggestions B ADJUSTING CUTTING HEIGHT WARNING Shut off the engine and allow the mower blades to come to a complete stop before adjusting the cutting height Adjustment Crank Roughly 8 turns equals 1 0 Mower Blade Lower Edge of a Deck 4 Measure This Distance and Add 1 5 16 to get 1 5 16 Cutting Height Cutting Height Smooth Surface i Figure 8 Adjusting Rough Cut Mower Cutting Height The cutting height can be adjusted in a range from 2 0 to 8 0 This is accomplished by turning the height adjust crank located at the back of the mower See Figure 8 Turn the crank clockwise to raise the mower cutting height and counter clockwise to lower the mower cutting height DANGER Shut off tow vehicle engine and allow mower blades to stop completely before attempting to measure the cutting height Adjust the mower as
14. is adjusted to the end of the slot and the brake stud clearance is under 1 2 then it is time to replace the belt occur If over braking occurs premature belt failure or a possible fire could occur due to excessive friction and overheating 1 CAUTION If brake stud is not set in correct position under braking or over braking may G MOWER BLADE REMOVAL BALANCING 8 INSTALLATION A CAUTION Sharp blades can cause bodily injury if not handled properly When removing the blade it is recommended that a block of wood be placed between the blade and the underside of the mower deck This will allow the removal of the blade without the need to hold the blade by hand A CAUTION Always balance the mower blades each time they are sharpened Out of balance mower blades cause excessive vibrations which lead to premature bearing failures bolts coming loose and overall deterioration of the mower CAUTION Always properly tighten the blade bolts to the specified torque Failure to do so can lead to unwanted loosening of the blade and damage to the blade holding saddle The Models MR44K and MR44B use the Kunz Engineering Part 202141 blade bolt This particular hex head bolt is a 3 4 16NF x 1 1 4 long grade 5 and its proper torque is 300 ft lbs To ease in the blade installation process use the same block of wood and method used during the removal of the blades H LUBRICATION There are five lubrication points on the rough cut mo
15. mportant safety information Please read it carefully lt lt lt lt PEP PPE gt IMPORTANT SAFETY INFORMATION WARNING Do not allow anyone to operate this equipment who has not fully read and comprehended the safety manual and who has not been properly trained in the safe operation of the equipment WARNING Operator should be familiar with all functions of the unit DANGER Keep hands feet hair and clothing away from moving parts WARNING Remove all objects from the work area that might be picked up and thrown by the blades WARNING Do not mow when children and others are around WARNING Keep all safety shields and deflectors in place during operation WARNING Shut off the engine and allow the mower blades to come to a complete stop before making any adjustments to the mower WARNING Shut off engine before disconnecting the mower from the tow vehicle or attempting to move the mower by hand WARNING Never carry children or passengers WARNING Do not allow children to operate this machine This entire manual is filled with important safety information Please read it carefully SAFETY SIGNS AND LOCATIONS A DANGER KEEP HANDS and FEET AWAY AVOID INJURY OR DEATH MOVING PART HAZARD To Prevent serious injury or death from moving parts Close and secure guards and shields before starting Keep hand feet hair and clothing away from moving parts 275007 Read and follow owner s man
16. r Wetlands Kit Part 003905 20 OPTIONAL EQUIPMENT OPTIONAL ELECTRIC LIFT KIT The optional electric lift kit consists of all of the mounting hardware brackets electric actuator and wiring with remote control panel Great for constantly changing terrain and grass brush heights Allows for quick cutting height changes on the go from the seat of the tow vehicle Raise up and over rocks and logs with ease Heavy duty 1500 Ib linear screw actuator made by Linak Works on all existing and new rough cut mowers Shown on the 57 Rough Cut Mower Electric Lift Kit Part 003912 21 OPTIONAL EQUIPMENT OPTIONAL FLOATATION KIT The optional floatation kit consists of one additional front and rear tire mounting brackets and hardware e Great for mowing around ponds and on rough uneven ground where scalping would normally occur e Clamping style receiver allows for adjustments from side to side with both the front and rear tires e Pinned receivers make for quick kit removal when not needed e Works on all existing and new rough cut mowers Shown on the 57 Rough Cut Mower Rear Floatation Kit Part 003907 Front Floatation Kit Part 003908 22
17. t Position Direct Behind Position Figure 5 Assembly of the Tongue and Hitch Pivot Screw Pin Shackle Direction of Travel Clevis Shift Tongue Left or Right Between Holes 5 16 Wire Lock Pins Wire Lock Section of Wire Lock Pin Placed Back From Direction of Travel Figure 6 ATV Tongue Assembly OPERATIONS AND ADJUSTMENTS This safety alert symbol is used to indicate safety instructions Follow these instructions to avoid personal injury and or property damage Read and follow all instructions in this manual and the attached engine manual WARNING Do not allow anyone to operate this equipment who has not fully read and comprehended the safety manual and who has not been properly trained in the safe operation of the equipment A WARNING Operator should be familiar with all functions of the unit A TONGUE CONFIGURATIONS AND ADJUSTMENTS WARNING Shut off the engine and allow the mower blades to come to a complete stop before adjusting the tongue The hitching system is designed so that the rough cut mower can be pulled directly behind a tow vehicle or offset to the left or right See Figure 7 Note When pulling the mower directly behind the hitch pivot should be fastened on the right carrier arm for maximum maneuverability See Figure 5 When pulling the mower in the offset position the hitch pivot can be fastened on either the right or left carrier arm See Figure 5 The tongue is equipped with a screw p
18. to the desired position Set the throttle at approximately half throttle Start engine and allow engine to warm up Set engine speed at about half throttle and slowly engage mower blades clutch handle The clutch handle is located at the front of the mower under the engine Note Some belt squealing may occur on engagement This is normal for a manual clutch engagement design CAUTION If the mower s engine dies while in use remove the rough cut mower from the uncut area before attempting to engage the clutch Inspect the blades for any obstructions that may prevent blade engagement Failure to follow these instructions may result in premature belt failure or a fire Adjust engine speed to full throttle D SHUTTING OFF ROUGH CUT MOWER A WARNING Shift to neutral and set the parking brake before dismounting the tow vehicle Slow the engine speed down to an idle and slowly disengage the clutch handle Allow engine to cool down for a short time before moving the ignition switch to the off position Turn off fuel shut off valve which is located on the underside of the gas tank E MOWER OPERATION A DANGER Keep hands feet hair and clothing away from moving parts A CAUTION Clean or replace any safety signs that are not readable or damaged gt PARAS gt lt PPP gt WARNING Remove all objects from the work area that might be picked up and thrown by the blades WARNING Do not mow when children and others are around WARNING
19. ual Know location and function of all controls Before starting engine remove grass build up from under safety shields Before starting engine attach machine to tow vehicle Shut off engine before disconnecting machine from tow vehicle or attempting to move machine by hand Do not fill fuel tank while engine is running or hot If tow vehicle stops going forward stop engine on towed mower before trying to push or pull tow vehicle When making turns slow down and watch ends of towed mower Never carry children or passengers Look down to the sides and behind before and while backing Do not allow children to operate this machine Do not mow when children and others are around Remove all objects that may be thrown by blade Keep safety shields and deflectors in place Shut off engine while in transport Before dismounting tow vehicle shift to neutral disengage power to tow vehicle mower and set parking brake Be sure blades engine and moving parts are stopped before placing hands or feet near blade or performing service 275007 Warning Decal Belt Sheild 275003 Danger Decal Cut Hand amp Foot 275002 Warning Decal General Serial and Model Decal NL A Clean or Replace Any Safety Signs That Are not Readable or Damaged Replacement decals can be purchased from your local dealer or Kunz Engineering Inc Mendota IL 61
20. wer one spring loaded idler pivot two caster wheel pivots and two blade spindles Lubricate at approximately 10 hr intervals or more often as required in dusty conditions Lubricate the blade spindles 2 5 pumps every 50 hours The bearings have trash guard seals to hold the seals in place during lubrication Lubricate with a high grade of pressure gun grease Note Do not over grease blade spindles Blade spindles are initially greased at the factory Greasing before 50 hrs may cause bearing seal damage which will result in premature bearing failure STORAGE Turn off fuel shut off valve which is located on the underside of the gas tank If the mower is stored outside the engine should be covered to prevent water from getting inside the engine during heavy rainstorms See the Engine Manual for additional information ACREASE ROUGH CUT MOWER SPECIFICATIONS ENGINE Engine Make Engine Model Cylinders Cycles Crankshaft Engine HP Bore Stroke Displacement Oil Capacity Crankshaft Dia Key Slot Crankshaft Length Threaded Hole in End of Crankshaft Engine Mounting Bolts Starter Choke MOWER Fuel Tank Effective Cutting Width Deck Construction Cutting Height Height Adjustment Rear Wheels Fixed 4 ply Turf Pnuematic Front Wheels Caster 4 ply Turf Pnuematic Blade Dia Engine Speed Blades Running CLUTCH TYPE Engagement Speed DIMENSIONS Length Width Height Weight HITCH Hitch Type T
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