1998 S/N 21329 - Walker Mowers

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Operating Instructions ADJUSTING CUTTING HEIGHT WARNING The engine must be stopped before adjusting cutting height. Disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat. 3. The mower will “freewheel” with the levers in the LOCKOUT position. The levers must be in the highest position to completely unlock the transmissions. Lockout Lever Cutting height is adjusted by positioning the four retainer hitch pins in a series of seven vertical holes on the deck support pins. Lift handles have been provided on each end of the deck to assist in raising the deck while positioning the hitch pins. Cutting heights range from 1 in. (25 mm) [top holes] to 4 in. (102 mm) [bottom holes] in 1/2 in. (13 mm) increments. Plunger Depressed Cam in LOCKOUT Position Deck Support Pin Lift Handle Lockout Lever - Freewheel Position 4. After moving the mower, release the locking cam, placing the lever DOWN in the normal OPERATING position. Make sure the transmission lockout plunger on the side of the transmission case (activated by the lockout lever) is completely released, otherwise the transmission operation will be erratic. Lockout Lever Hitch Pin Cutting Height Adjustment TRANSMISSION LOCKOUT To move the mower with the engine NOT running (dead battery, maintenance, etc.), the hydrostatic transmissions are unlocked (released). Plunger Released Cam in UNLOCKED Position 1. Raise the front body. 2. Lift the transmission lockout lever on both the RH and LH transmissions and secure into place with the locking cam. Lockout Lever - Normal Operating Position 34
Operating Instructions RECOMMENDATIONS FOR MOWING IMPORTANT: Operate the engine at full speed when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system. • Keep the mower deck and discharge chute clean. • Mow with sharp blades. A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed). • When using a side discharge mower deck, the side discharge shield must not be removed and must be kept in the lowest possible position to deflect grass clippings and thrown objects downward. Orient the side discharge away from sidewalks or streets to minimize cleanup of clippings. When mowing close to obstacles, orient the side discharge away from obstacles to reduce the chance of damage to property by thrown objects. • It is preferable to cut grass when it is dry and not too tall. Mow frequently and do not cut grass too short. (For best appearance, cut off 1/3 or less of existing grass height.) • When mowing, operate the engine at or near full throttle for the best cutting action and performance of the grass handling system (GHS). Mowing with a lower engine RPM causes the mowing blade to not cut clean and tear the grass. The engine is designed to be operated at full speed. • When mowing in adverse conditions (tall and/or wet grass), mow the grass twice. Raise the mower to the highest setting - 4 in. (102 mm) - for the first pass and then make a second pass cutting to the desired height. • Use a slow setting on the FSC for trimming operations. • Make sure the mower is leveled properly for a smooth cut. Refer to Deck Leveling in Assembly Instructions. Side Discharge Shield in Lowest Position • When operating on a slope, reduce speed and use caution to start, stop, and maneuver. Avoid sharp turns or sudden changes in direction. The maximum recommended side slope operating angle is 20 degrees or 33% grade. Maximum Recommended Side Slope - Do Not Operate on Steep Slopes • Use an alternating stripe mowing pattern for best appearance and vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass. • Avoid damage to the grass by slipping and skidding of the drive tires. Use smooth control movements of the steering levers since the hydrostatic transmissions are “power boosted controls” and jerking the levers can easily slip the tires. For sharp turns, do not allow the inside wheel to stop and twist on grass; pull inside steering lever into reverse for a smooth “rolling” turn (one wheel rolling forward while the other rolls backward). Maximum Recommended Side Slope 35
Page 1 and 2: OWNER’S MANUAL Safety, Assembly,
Page 3 and 4: Table of Contents General Informati
Page 5 and 6: General Information HIGHLIGHTED INF
Page 7 and 8: Specifications MODEL MT 20.0 HP MT
Page 9 and 10: Specifications MODEL MT 20.0 HP MT
Page 11 and 12: Component Identification NOTE: Cont
Page 13 and 14: Component Identification Donaldson
Page 15 and 16: Safety Instructions 6. Do not wear
Page 17 and 18: Safety Instructions 4. Perform only
Page 19 and 20: Safety Instructions SAFETY, CONTROL
Page 21 and 22: Assembly Instructions 3. After the
Page 23 and 24: Assembly Instructions NOTE: When in
Page 25 and 26: Assembly Instructions PREOPERATING
Page 27 and 28: Assembly Instructions CAUTION Do no
Page 29 and 30: Operating Instructions Steering Lev
Page 31 and 32: Operating Instructions The Forward
Page 33 and 34: Operating Instructions Hourmeter Th
Page 35 and 36: Operating Instructions IMPORTANT: M
Page 37: Operating Instructions IMPORTANT: D
Page 41 and 42: Operating Instructions GRASS HANDLI
Page 43 and 44: Operating Instructions Clogging Che
Page 45 and 46: Operating Instructions Dumping the
Page 47 and 48: Operating Instructions Grass Catche
Page 49 and 50: Maintenance Instructions KOHLER TIP
Page 51 and 52: Maintenance Instructions LUBRICATIO
Page 59 and 60: Maintenance Instructions CLEANING 1
Page 61 and 62: Maintenance Instructions CLEANING P
Page 63 and 64: Maintenance Instructions CLEANING N
Page 65 and 66: Maintenance Instructions CHECKING/S
Page 67 and 68: Maintenance Instructions CHECKING/S
Page 69 and 70: Maintenance Instructions REPLACING/
Page 77 and 78: Maintenance Instructions ADJUSTMENT
Page 87 and 88: Maintenance Instructions ELECTRICAL
Page 89 and 90:
Operator’s Notes 85
Page 91 and 92:
LIMITED WARRANTY FOR WALKER COMMERC
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1998 S/N 21329 - Walker Mowers

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