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Table of Contents
Related Manuals for Walker A21 Hi-Dump
Summary of Contents for Walker A21 Hi-Dump
- Page 1 A21 Hi-Dump ® Operator’s Manual Safety, Assembly, Operation, and Maintenance A21 compatible with Models D/T (10.0 Catcher Box) Please Read and Save These Instructions For Safety, Read All Assembly and Operation Instructions Beginning S/N: 2018-5524 Prior to Operating Attachment P/N: 8404-11...
- Page 2 Walker Mfg. Co. is continually striving to improve the design and performance of its products. We reserve the right to make changes in specifications and design without thereby incurring any obligation relative to previously manufactured products.
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Page 3: Table Of Contents
UNIT DESCRIPTION Warranty CONFIGURATION NOTE Specifications Safety Instructions BEFORE OPERATING OPERATING MAINTENANCE SAFETY, CONTROL, AND INSTRUCTION DECALS Assembly Instructions INSTALLING A21 HI-DUMP ON TRACTOR ® Operating Instructions HI-DUMP OPERATION ® Maintenance Instructions CHECKING OIL LEVEL LUBRICATION Grease Fitting and Oil Point... -
Page 4: General Information
Most accidents associated with the opera- provided. tion or maintenance of a Walker Tractor are caused by disregarding basic safety precautions or specific Hi-Dump Serial No. warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present. -
Page 5: Servicing Of Hydraulic Power Unit
For service of the hydraulic power unit during the limited warran- ty period, contact your authorized Walker dealer. Any unauthorized work done on the hydraulic power unit during the warranty period may void the warranty. -
Page 6: Specifications
Specifications A21 HI-DUMP ® MODEL Catcher Lift Height in. (cm) 67 (170) Maximum Lift Rating lb (kg) 200 (91) Lift/Dump Cycle Time 20 seconds Lift/Dump Controls Individual Toggle Switch with Solenoid Activated Valves Operating Hydraulic Cylinders Weight Installed lb (kg) 150 (68) Height Increase (Tractor) in. -
Page 7: Safety Instructions
An IMMEDIATE hazard that WILL result in tion, maintenance, or safety, please contact your severe personal injury or DEATH, if warn- authorized Walker Mower dealer or call Walker Man- ufacturing Company at (970) 221-5614. ing is ignored and proper safety precau- tions are not taken. - Page 8 Safety Instructions 11. Never attempt to make any adjustments 6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this ma - while the engine is running, except where chine while wearing shorts; always wear specifically instructed to do so.
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Page 9: Operating
Safety Instructions OPERATING Do not operate machine if the operator pres- ence safety switch system is not working. Verify proper operation by having the operator 1. Operate the machine only in daylight or in good artificial light with good visibility of areas lift off the seat with the engine running and mov- being mowed. - Page 10 Safety Instructions 14. The maximum recommended slope operat- 20. If the cutting blades strike a solid object or the ing angle is 15 degrees or 26% grade. When machine begins to vibrate abnormally, immedi- operating the machine on a slope, reduce speed ately disengage the blade clutch (PTO), stop and use caution to start, stop, and maneuver.
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Page 11: Maintenance
Walker dealer or authorized conditions. Kohler service dealer. Altering the equipment or engine in any manner... -
Page 12: Safety, Control, And Instruction Decals
SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual. 8600-5 Safety Decal: Decal, Engine Exhaust Location: LH Side of Chassis... -
Page 13: Assembly Instructions
Assembly Instructions INSTALLING A21 HI-DUMP ON THE TRACTOR and remove the instrument panel guard—retain ® all hardware, as it will be reused. 1. Disconnect battery. Always disconnect the neg- ative (-) terminal first. 8. Remove the precleaner tube. Loosen hose clamp and remove three (3) shock mount 2. - Page 14 Assembly Instructions 15. Route the harness under the chassis, and back up in front of the PTO safety switch. Remove Pipe Clamp and discard small cable clamp and replace with larger clamp (P/N 5832). Install clamp using the 10-24 x 7/8 (F418) screw and the 10-24 (F002) keps nut as shown in Install Cable Clamp to PTO Safety Switch Mount photo being sure to capture the PTO safety switch wires in the...
- Page 15 Assembly Instructions NOTE: If the Hi-Dump 17. Plug the wire harness into the relay and run mounting hole is not ® the Hi-Dump harness along the tractor’s main present in the chassis, it will be necessary to ® harness to the battery as shown in Route Wire drill a 5/16 in.
- Page 16 Assembly Instructions NOTE: If there is a gap between the rear 28. Place the catcher assembly on the Hi-Dump ® upright mount and the chassis frame, install the frame as shown in Install Catcher Box As- optional shim (P/N 8400-39) for best fit. sembly photo.
- Page 17 Assembly Instructions NOTE: The channel angle with the ball stud 34. Remove existing lower arms (outside of catcher mount attaches to the left side. box) and install new Lower Power Dump Arms (P/N 8607-10) on both sides. RH Channel 35. Install new inner power dump arms (P/N LH Channel Angle 8623-6 RH and P/N 8623-7 LH) on both sides...
- Page 18 Assembly Instructions Lower Arm P/N 8608-9 Torsion Bar Drill 3/16 in. DRILL 3/16” DIA. Holes HOLES Cable Guide Spring Hook Extension on Torsion Bar Spring Cable 8 in. 8” Cable Guide Inner Power Dump Arm Cable Assembly Ball Joint Hole in Catcher Box 1-5/16 in.
- Page 19 Assembly Instructions NOTE: Check that the spout is oscillating and the Grass-Pak switch triggers the Full Signal ® Horn to sound when the vane is pushed toward the LH direction while oscillating. 42. FOR LIQUID-COOLED MODELS ONLY: Remount the coolant recovery tank using the new mount plate and hardware provided.
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Page 20: Operating Instructions
Operating Instructions HI-DUMP OPERATION NOTE: With the Hi-Dump mechanism in the nor- ® ® mal operating position (catcher down), the catcher The operator raises and dumps the GHS catcher can be manually raised. In the case of a dead box while sitting in the seat. Two toggle switches battery, use the auxiliary power terminals to charge/ operate independent hydraulic cylinders to raise, boost the battery to operate the Hi-Dump... - Page 21 Operating Instructions Safety Lockout Arm Stowed Safety Lockout Arm Disengaged Position...
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Page 22: Maintenance Instructions
NOTE: Tractor Lubrication Points are not shown here. For Tractor Lubrication Points, refer to your Tractor’s Operator’s Manual. If you do not have an Operator’s Manual, you can download a copy at www.walker.com. * 32 oz (0.95 liters) is capacity if system is complete- ly empty... - Page 23 Maintenance Instructions Ident Lubrication Location Type Places Hi-Dump Catcher Frame Grease ® LH/RH Rear Pivots Grease Catcher Pivot Arm Grease Hydraulic Power Unit A21 Lubrication Points Diagram...
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Page 24: Adjustments
Maintenance Instructions ADJUSTMENTS Catcher Box Clearance with Body Chute ● Using the LIFT switch, lower the catcher assem- bly to the full down position. Check alignment of the catcher box to the GHS body chute (blower discharge chute). Make sure there is clearance on all sides. - Page 25 This page left intentionally blank...
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Page 26: Parts List/Diagram
A21 HI-DUMP ASSEMBLY ® ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D A21 Hi-Dump Kit/10.0 8402-8 Control Lift Rod 5214-11 Ball Joint (1/2-20LH) Hi Strength 8607-10 Lower Arm, Power Dump 8403-18 Pump Guard 7620-3 Pivot Bushing (1/2 x 9/16) 7620-16... - Page 27 F025 F012 F208 F012 F012 F048 F402 F037 F016 F040 F009 F035 F398 F012 F399 F016 F002 F012 F002 F038 F009 F009 F035 F002 F034 F396 F002 F208 F009 F009 Beginning S/N 2018-5524 Use only genuine Walker replacement parts. ®...
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Page 28: Hi-Dump ® Hydraulics
Toggle Switch/DP 8440-3 Jumper Wire 8440-8 Wire Harness/Hi-Dump 7833 Cable Clamp (7/8 x 1/4) 8440-6 Relay Harness 8553 Splice Tap (18-14 Ga.) 8440-10 Wire Assembly (3”) 6941-8 Relay Switch 60/40 Amp Beginning S/N 2018-5524 Use only genuine Walker replacement parts. ®... - Page 29 DETAIL I F004 INSERT RED WIRE CONNECT TO FROM 8440-7 RED WIRE END VIEWS ARE SHOWN FROM BACK OF PLUG Relay Harness TRACTOR CHASSIS CONNECTING 8440-10 to TIME DELAY HARNESS Beginning S/N 2018-5524 Use only genuine Walker replacement parts. ®...
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Page 30: Maintenance And Service Record Sheet
MAINTENANCE AND SERVICE RECORD SHEET DATE SERVICE ENGINE ITEM HOURS ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________... -
Page 31: Warranty
(90) days. At Walker’s request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker, transportation charges prepaid. - Page 32 WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614 FORM NO. 111418 PRINTED IN USA www.walker.com ©2018 WALKER MFG. CO...