44” ROUGH CUT OWNER’S MANUAL With Assembly Instructions For Models: MR44B & MR44V KUNZ ENGINEERING, INC.
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 words: DANGER, WARNING, or CAUTION.
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.
SAFETY SIGNS AND LOCATIONS 275003 – Danger Decal, Cut Hand & Foot 275007 – Warning Decal, Belt Sheild 275002 – Warning Decal, General Serial # and Model # Decal 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.
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.
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 3-1/2" 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.
1/2” x 3” Bolt Height Adjust Assy. Cross Brace Tube Figure 3: Cross Brace Tube Installation Screw Mounting Flat Height Adjust Assy. 1/2” x 1” Bolt Lower Deck Mount Screw 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.
Direction of Travel Screw Pin Shackle Clevis Shift Tongue Left or Right Between Holes Tongue 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.
The tongue is equipped with a screw pin 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.
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 follows: 1. Pull the mower on to a smooth, level surface. 2.
C. STARTING ENGINE WARNING: Set parking brake on tow vehicle. Attach mower tongue to tow vehicle. 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 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.
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: 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.
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.
With the clutch engaged, adjust the nuts on the spring-loaded idler adjuster bolt until the length of the spring is approximately 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: If the brake stud 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. CAUTION: If brake stud is not set in correct position, under-braking or over-braking may occur. If over-braking occurs, premature belt failure or a possible fire could occur due to excessive friction and overheating. G. MOWER BLADE REMOVAL, BALANCING & INSTALLATION CAUTION: Sharp blades can cause bodily injury if not handled properly.
J. EPA EVAPORATIVE COMPONENTS This mower has been designed and built to meet all current EPA regulations. Any modification to the fuel tank, fuel lines, vapor hose, fuel cap, roll-over / fuel vapor valve, carbon canister (California Only) and hose clamps are prohibited. Replacement evaporative components should be purchased from Kunz Engineering. Any questions about EPA regulations or evaporative components can be directed to Kunz Engineering Inc. at 815-539-6954.
ACREASE ROUGH CUT MOWER SPECIFICATIONS Model Model MR44B MR44V Engine Make Briggs & Stratton Briggs & Stratton Commercial Engine Model Intek Professional Vanguard Cylinders 1 2 Cycles 4 4 Crankshaft Vertical Vertical Engine HP 19 18 Bore 3.12" 2.84" Stroke 3.06" 2.76" Displacement 33.0 cu. In. 34.78 cu. In. Oil Capacity 1.5 U.S. qt 1.5 U.S. qt Crankshaft Dia. 1.0" 1.0" Key Slot 1/4" 1/4" Crankshaft Length 3.15" 3.15" 7/16-20 7/16-20 5/16-18x1.
ACREASE ROUGH CUT MOWER PARTS LIST Item 1 2 3 4 5 6 7 8 8 9 9 10 11 12 13 14 15 16 17 18 19 20 21 21 22 22 23 23 23 23 23 23 23 23 24 25 26 27 28 29 30 31 Part # 202141 214021 216002 216009 222005 222012 225005 226003 226008 226004 226009 238007 241001 241010 243007 243010 258023 900075 900160 243006 600271 241011 259008 260004 264000 264010 264003 269000 269010 269001 269009 275001 275002 275003 275007 275011 275019 275021 275024 277002 277011 277035 277036 277040 600071 600136 600146 Description Blade
Item 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 Part # 600185 600186 600252 600253 600254 600264 600265 600268 600291 600292 900023 900049 900058 900061 900079 900082 900148 900150 900154 900155 900156 900157 900158 900180 243005 Description Top Lon g Support Top Shor t Support Flap Reta iner Strip Safety Belting Battery Box Spacer Belt Sheil d, Left Belt Sheil d, Ri ght Hei ght Adjust Support Canister Support (California Only) Clutch Arm Contr ol Panel Battery Box Assy.
9 44 4 3 23 14 47 34 8 6 48 52 20 13 51 2 45 35 10 25 55 11 7 43 54 30 39 33 41 36 16 15 21 31 19 22 17 32 1 20 53 40 40 46 29 26 28 37 50 12 5 38 24 27 49 18 42 ACREASE 44” ROUGH CUT MOWER PARTS
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.
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 lb linear screw actuator made by Linak. Works on all existing and new rough cut mowers.
OPTIONAL EQUIPMENT OPTIONAL FLOATATION KIT The optional floatation kit consists of one additional front and rear tire, mounting brackets and hardware. • • • • Great for mowing around ponds and on rough uneven ground where scalping would normally occur. Clamping style receiver allows for adjustments from side to side with both the front and rear tires. Pinned receivers make for quick kit removal when not needed. Works on all existing and new rough cut mowers.
