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44” ROUGH CUT
OWNER’S MANUAL
With Assembly Instructions
For Models: MR44B & MR44K
KUNZ ENGINEERING, INC. / MENDOTA, IL 61342 / PH (815) 539-6954
1/09
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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 and one of three s
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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 wh
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SAFETY SIGNS AND LOCATIONS 275003 – Danger 275007 – Warning Decal, Cut Hand & Foot 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. Mendota, IL 61342 (815) 539-6954 3
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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
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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. Over tight
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1/2” x 3” Bolt Cross Brace Height Adjust Assy. Tube Figure 3: Cross Brace Tube Installation Screw Mounting Flat Height Adjust 1/2” x 1” Bolt Assy. Lower Deck Screw Mount 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
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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
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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. WARN
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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. This is accomplished by pulling the 5/16” wire lock pins out and choos
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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 surf
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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.
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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 fire
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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 sheav Slip the belt down under the drive sheave and off the blade spindle sheaves. e and off the blade spindle sheaves. Install the new
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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: Failure to periodically ad
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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. W
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ACREASE ROUGH CUT MOWER SPECIFICATIONS Model Model MR44B MR44K ENGINE: Engine Make Briggs & Stratton Kohler Command Pro Engine Model Intek AVS OHV CV 493 Cylinders 11 Cycles 44 Crankshaft Vertical Vertical Engine HP 17.5 18 Bore 3.57" 3.54" Stroke 3.06" 3.03" Displacement 30.6 cubic inches 29.9 cubic inches Oil Capacity 1.5 U.S. qt 2 U.S. qt Crankshaft Dia. 1.0" 1.0" Key Slot 1/4" 1/4" Crankshaft Length 3.15" 3.15" Threaded Hole in End of Crankshaft 7/16-20 7/16-20 Engine Mounting Bolts 5/16-
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ACREASE ROUGH CUT MOWER PARTS LIST Item Part # Description Quantity 1 214021 Cup Washer 6 2 216002 Wire Lock Pin, .31" x 2.50" 2 3 216009 Screw Pin Shackle Clevis 1 4 222005 Worm Drive Hose Clamp (7-7/8" to 9-1/8" Clamping Dia.) 2 5 222012 Single Split Collar (1" I.D. x 1/2: Thick) 2 6 225005 Compression Spring, 4-1/2"L x 1-3/32" O.D. x .125" Wire dia. 1 7 226003 Offset Wheel Assy. (15/600 x 6, 4 Ply Turf) 2 8 226004 Centered Wheel Assy. (5.30/4.50 x 6, 4 Ply Stud) 2 9 238007 "V" Belt, .62" x 7
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Item Part # Description Quantity 31 600253 Safety Belting 1 32 600254 Battery Box Spacer 2 33 600264 Belt Sheild, Left 1 34 600265 Belt Sheild, Right 1 35 600268 Height Adjust Support 1 36 900023 Control Panel 1 37 900049 Battery Box Assy. 1 38 900058 Hitch Pivot 1 39 900061 Pivot Arm 4 40 900079 Tank Support 1 41 900082 Tongue 1 42 900148 Caster Fork 1 43 900150 Engine Support Bracket 1 44 900151 Clutch Arm 1 45 900153 Idler Arm Assy. 1 243005 Bronze Bearing, 1/2"I.D. x 3/4" O.D. x 3/4" Long
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UACREASE 44” ROUGH CUT MOWER PARTS 19 22 37 24 31 30 41 4 19 32 36 18 2 15 16 3 5 17 38 43 48 25 12 11 13 21 23 47 6 14 40 42 50 34 44 33 29 35 26 45 20 7 10 28 39 46 8 49 9 1 27
