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57” ROUGH CUT
MR55K
MR55B
OWNER’S MANUAL
With Assembly Instructions
For Models: MR55T, MR55B-17.5HP, MR55B-22-23HP & MR55K
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 ATV tongue assembly A. ASSEMBLY OF MOWER WHEELS 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
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Carrier Arm Rear Tire Bolt Assembly Hex Nut and Lock Washer Cup Washer Flat Washer Figure 1: Rear Tire Assembly Installation Hitch Pivot – Attach to Tongue Height Adjust Either Left or Right Screw Carrier Arm Assy. Front (Rubber Flap Side) Rear Tire Assy. Carrier Arm (Attach on outside for Assy. both left and right sides) Pivot Arm Offset Position Direct Behind Position Figure 2: Assembly of Carrier Arm Assy., Hitch Pivot, and Tongue 5
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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 3: 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 cranks on both sides of the mower. See Figure 5. Turn the cranks 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.
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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 engage mower blades clutch handle. (The c
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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 7 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 7. Take special care to
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provide the appropriate braking force. If the spring length is to long it will be necessary to adjust the brake stud closer to the belt. If the spring length is to short 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
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G. MOWER BLADE REMOVAL, BALANCING & INSTALLATION 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. CAUTION: Always balance the mower blades each time they are sharpened. Out of balance mower blades cause excess vibrations which lead to prematur
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ACREASE ROUGH CUT MOWER SPECIFICATIONS Model Model Model Model MR55T MR55B-17.5HP MR55B-22-23HP MR55K ENGINE: Engine Make Tecumseh Briggs & Stratton Briggs & Stratton Kohler Engine Model Enduro OHV 170-EXE Intek AVS OHV Intek OHV Command OHV Cylinders 1 1 2 2 Cycles 4 4 4 4 Crankshaft Vertical Vertical Vertical Vertical Engine HP 17 17.5 22-23 20 Bore 3.56” 3.57" 2.97" 3.03" Stroke 3.00” 3.06" 2.89" 2.64" Displacement 29.9 cubic inches 30.6 cubic inches 44.0 cubic inches 38.1 cubic inches Oil
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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 225003 Compression Spring, 3"L x 1-3/32" O.D. x .135" Wire dia. 1 5 225005 Compression Spring, 4.50"L x 1-3/32" O.D. x .125" Wire dia. 1 6 226003 Offset Wheel Assy. (15/600 x 6, 2 Ply Turf) 2 7 226004 Centered Wheel Assy. (5.30/4.50 x 6, 2 Ply Stud) 2 8 238004 "V" B
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Item Part # Description Quantity 31 600189 Idler Spacer Block 1 32 900023 Control Panel 1 33 900049 Battery Box Assy. 1 34 900058 Hitch Pivot 1 35 900061 Pivot Arm 4 36 900062 Height Adjust Nut 2 37 900063 Clutch Arm 1 38 900065 Idler Arm Assy. 1 243005 Bronze Bearing, 1/2"I.D. x 3/4" O.D. x .75" Long 2 39 900066 Screw Adjuster 2 40 900069 Mower Deck 1 41 900071 Engine Support Bracket (Model MR55B-17.5HP & MR55T) 1 41 600172 Engine Support Bracket (Model MR55K & MR55B-22-23HP) 1 42 900079 Tank
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UACREASE ROUGH CUT MOWER PARTS 17 21 33 23 43 25 17 18 4 2 3 32 16 29 14 34 41 40 15 44 45 12 24 36 10 11 30 22 5 31 42 13 6 20 28 8 26 19 37 7 35 39 27 38 1 9
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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 bo
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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 mowe
