Walker A21 User Manual

A21 Hi-Dump® Kit

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 Prior to Operating Attachment

Beginning S/N: 2018-5524

P/N: 8404-11

Foreword

Thank you. . .for purchasing the Walker Hi-Dump® Kit for your Walker Mower. Every effort has been made to provide you with the most reliable machine on the market, and we are sure you will

be among our many satised customers. If for any reason this product does not perform to your

expectations, please contact your local dealer. Every customer is important to us. Your satisfaction is our goal.

Please. . .read this manual thoroughly! Before you operate your machine, please read this entire manual. Some of the information is crucial for proper operation - it will help protect your investment and ensure that the machine performs to your satisfaction. Some of the information is important to your safety, and must be read and understood to help prevent possible injury to the operator

or others. If anything in this manual is confusing or hard to understand, please contact your local authorized dealer or call our service department, at (970) 221-5614, for clarication before operating

or servicing this machine.

This manual covers the A21 (8400A) Hi-Dump® installed on Model D or T.

All shields and guards must be in place for the proper and safe operation of this machine. Where they are shown removed in this manual, it is for illustration purposes only. Do not operate

this machine unless all shields and guards are in place.

Walker Mfg. Co. is continually striving to improve the design and performance of its products.

We reserve the right to make changes in specications and design without thereby incurring any

obligation relative to previously manufactured products.

Sincerely,

WALKER MANUFACTURING COMPANY

Bob Walker, President

i

Table of Contents

General Information 1

HIGHLIGHTED INFORMATION 1

GLOSSARY 1

IDENTIFYING NUMBER LOCATIONS 1

SERVICING OF HYDRAULIC POWER UNIT 2

UNIT DESCRIPTION 2

CONFIGURATION NOTE 2

Specications 3

Safety Instructions 4

BEFORE OPERATING 4

OPERATING 6

MAINTENANCE 8

SAFETY, CONTROL,

AND INSTRUCTION DECALS 9

Assembly Instructions 10

INSTALLING A21 HI-DUMP® ON TRACTOR 10

Parts List/Diagram 23

HI-DUMP® ASSEMBLY 23

HI-DUMP® HYDRAULICS 25

MAINTENANCE AND SERVICE

RECORD SHEET 27

Warranty 28

Operating Instructions 17

HI-DUMP® OPERATION 17

Maintenance Instructions 19

CHECKING OIL LEVEL 19

LUBRICATION 19

Grease Fitting and Oil Point Lubrication Diagram 20

ADJUSTMENTS 21

Catcher Box Clearance with Body Chute 21

Door Opening Cable Tension 21

Control Lift Rod 21

ii

General Information

HIGHLIGHTED INFORMATION

Walker Manufacturing recommends that any service requiring special training or tools be performed by an authorized Walker Tractor dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the operation or maintenance of a Walker Tractor are caused

by disregarding basic safety precautions or specic

warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present.

Information of special importance has been highlighted in bold type in this manual. Refer to Safety

Instructions for the meanings of DANGER, WARN- ING, CAUTION, IMPORTANT, and NOTE.

GLOSSARY

There are many terms that are either unique to this equipment or that are used as acronyms. The following terms and their denitions will help while using this manual:

● FORWARD SPEED CONTROL (FSC) controls

the maximum forward speed of the tractor; functioning as a cruise control.

IDENTIFYING NUMBER LOCATIONS

The Hi-Dump® serial number is afxed to the LH side of the main frame weldment. Model and serial numbers are helpful when obtaining replacement parts and maintenance assistance. For ready reference, please record these numbers in the space provided.

Hi-Dump Serial No.

Date of Purchase

Refer to the Operator’s Manual that accompanies

the tractor for the location of the tractor serial number.

Serial Number

● GRASS HANDLING SYSTEM (GHS®) collects

mowed material and deposits it in the catcher.

● HI-DUMP® is a power lifting and dumping mech-

anism for the GHS catcher box controlled from

the operator’s seat.

● LEFT HAND (LH) refers to the left-hand side of

the tractor when the operator is seated facing forward in the tractor seat.

● POWER TAKE-OFF (PTO) transmits engine

power to run the cutter blades and GHS blower.

● RIGHT HAND (RH) refers to the right-hand side

of the tractor when the operator is seated facing forward in the tractor seat.

● STEERING LEVERS steer the tractor by con-

trolling the dual hydrostatic transmissions.

● TRACTOR is the prime mover, including the

engine, drivetrain, operator seat, and controls to operate the mower.

A21 Hi-Dump Serial Number Location

(Top View)

1

General Information

SERVICING OF HYDRAULIC POWER UNIT

Only routine maintenance and general service instructions are provided in this manual. 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. If you have any difculty nding an autho- rized outlet or obtaining warranty service, please contact our Service Department for assistance:

Walker Manufacturing Company

5925 E. Harmony Road

Fort Collins, CO 80528

1-970-221-5614

www.walker.com

UNIT DESCRIPTION

With the optional Hi-Dump® kit installed, the opera-

tor raises and dumps the GHS catcher box while

seated in the seat. Two toggle switches operate independent hydraulic cylinders to raise, lower and dump the catcher. The back door automatically opens and closes during the dump cycle. The catcher may be dumped at any raised position (Normal

Operating-Intermediate-Fully Raised).

CONFIGURATION NOTE

When Hi-Dump® is installed, the optional single wide tail wheel (P/N 8049) on the tractor is not rec-

ommended due to tail weight and extra turning resistance. Use the standard dual tail wheel (P/N 7420-

20).

2

Specications

A21 HI-DUMP® KIT

MODEL A21

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. (cm) 3 (8)

Hydraulic Oil Chevron Rykon Premium Oil ISO 68 or

Equivalent

Oil Capacity  oz (L) 32 (.95)

NOTE: The manufacturer reserves the right to make changes in specications shown herein at any time without

notice or obligation.

3

Safety Instructions

Pay particular attention to any information labeled

DANGER, WARNING, CAUTION, IMPORTANT, and NOTE in this manual.

When you see the Safety Alert Symbol ( ), read, understand, and follow the instructions. Fail ure to comply with safety instructions may result in personal injury.

The seriousness or degree of importance of each

type of information is dened as follows:

DANGER

An IMMEDIATE hazard that WILL result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

WARNING

A POTENTIAL hazard that COULD result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

Walker Manufacturing cannot predict every potentially dangerous situation. Therefore, items labeled as such in this manual do not cover all conceivable situations. Any person using procedures, tools, or control techniques not recommended by Walker Manufacturing must take full responsibility for safety.

The Walker Rider Lawnmower has been designed with many safety features to protect the operator from personal harm or injury. However, it is necessary for the operator to use safe operating procedures at all times. Failure to follow safety instruc-

tions contained in this manual may result in personal injury or damage to equipment or property.

If you have any questions concerning setup, operation, maintenance, or safety, please contact your authorized Walker Mower dealer or call Walker Manufacturing Company at (970) 221-5614.

BEFORE OPERATING

1. Read and understand the contents of this Operator’s Manual before starting and operating the machine. Become thoroughly famil-

iar with all machine controls and how to stop the machine and disengage the controls quickly.

Replacement Operator’s Manuals are available

by sending the Model and Serial Number to:

Walker Manufacturing Company

5925 East Harmony Road

Fort Collins, CO 80528

CAUTION

Possible hazards or unsafe practices that MAY result in MODERATE personal injury or property damage, or machine damage, if warning is ignored and proper safety precautions are not taken.

IMPORTANT: Identies mechanical information

demanding special attention, since it deals with the possibility of damaging a part or parts of the machine.

NOTE: Identies information worthy of special attention.

2. Never allow children to operate rider mower. Do not allow adults to operate without proper instruction.

3. Clear the area to be mowed of any foreign objects which may be picked up and thrown by

cutter blades. Pick up all sticks, stones, wire,

and any other debris.

4. Keep everyone, especially children and pets, a safe distance away from the area being mowed.

Do not mow with bystanders in the area.

5. Do not operate the machine barefoot or wearing sandals, sneakers, tennis shoes, or similar lightweight footwear. Wear substantial

protective footwear.

4

Safety Instructions

6. Do not wear loose tting clothing that could get

caught in moving parts. Do not operate this ma chine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some local ordinances and insurance regulations.

7. Prolonged exposure to loud noise can cause

impairment or loss of hearing. Operator hear- ing protection is recommended; particularly

for continuous operation of the GHS Model due

to blower noise level. Wear a suitable hearing protective device, such as earmuffs or earplugs.

8. Keep all protective shields and safety de-

vices in place. If a protective shield, safety

device, or decal is damaged, unusable, or missing, repair or replace it before operating the machine.

9. Be sure interlock switches are functioning correctly, so the engine cannot be started unless the Forward Speed Control lever is in the

NEUTRAL-PARK position, the PTO clutch is in

the DISENGAGED position, and the Parking Brake in the ENGAGED position. Also, the engine should stop if the operator lifts off the seat with any one or more of these controls in the operating position: (1) Forward Speed Control (FSC) out of NEUTRAL-PARK, (2)

PTO Clutch ENGAGED, or (3) Parking Brake DISENGAGED.

11. Never attempt to make any adjustments while the engine is running, except where

specically instructed to do so.

12. The electrical system battery contains sulfuric acid. Avoid any contact with skin, eyes, and clothing. Keep the battery and acid out of reach of children.

WARNING

This product can expose you to chemicals including Di-(2-ethylhexyl) phthalate which is known to the State of California to cause cancer, and Di-(2-ethylhexyl) phthalate, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

NOTE: There is a 1/2 second time delay func-

tion on the seat switch to avoid engine power interruption when driving over bumps.

10. Handle gasoline with care. Gasoline is highly

ammable and its vapors are explosive:

a. Use an approved fuel container.

b. Never add fuel to a running engine or hot

engine (allow hot engine to cool several minutes).

c. Keep matches, cigarettes, cigars, pipes,

open ames, or sparks away from the fuel

tank and fuel container.

d. Always ll the fuel tank outdoors using

care. Fill to about one inch from the top of the tank. Use a funnel or spout to prevent spilling.

e. Replace the machine fuel cap and contain-

er cap securely and clean up any spilled fuel before starting the engine.

5

Safety Instructions

OPERATING

1. Operate the machine only in daylight or in

good articial light with good visibility of areas

being mowed.

2. Sit on the seat when starting the engine and operating the machine. Keep feet on the deck footrests at all times when the tractor is moving

and/or the mower blades are operating. Never operate the tractor without a deck or implement installed.

3. For a beginning operator, learn to steer (maneuver) the tractor with a slow engine speed before attempting any mowing operation.

Be aware that, with the front mounted mower

conguration, the back of the machine swings

to the outside during turns.

DANGER

Do not operate around overhanging tree branches or bushes at the same height as the operator’s torso and head where inadvertent contact may cause injury.

7. Do not operate machine if the operator presence safety switch system is not working.

Verify proper operation by having the operator lift off the seat with the engine running and moving three controls, one at a time; (1) Move the FSC lever out of the NEUTRAL-PARK position,

(2) Engage the PTO Clutch, and (3) Disengage the Parking Brake. Moving any of these controls should stop the engine after a 1/2 second

delay.

8. Do not run the engine in a conned area without adequate ventilation. Exhaust fumes are hazardous and can be deadly.

9. Do not carry passengers - maximum seating capacity is one (1) person.

10. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher than desired to expose any hidden obstacles. Then, clean the area and mow to the desired height.

11. Avoid sudden starts or stops. Before back- ing the machine up, look to the rear to be sure no one is behind the machine. Watch carefully for trafc when crossing or working near roadways.

4. Remember, for an emergency stop, the forward motion of the tractor can always be stopped by pulling the Forward Speed Control (FSC) into the NEUTRAL-PARK position.

5. In case either of the transmission drive belts break during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK po- sition. When the machine is stopped or moving slowly, engage the parking brake.

NOTE: The emergency stop procedure is exactly the same procedure used to normally stop and park the machine.

6. Disengage the PTO clutch and put the FSC in the NEUTRAL-PARK position before starting the engine (an ignition interlock switch normally prevents starting of the tractor if these controls are in the OPERATING position).

12. When moving forward, do not suddenly put the

tractor in reverse by rapidly pulling on the steering levers, especially when going downhill, as this can lift the tractor tail wheel off the ground and set up a bucking motion due to operator

overcontrol. If bucking does occur, immediately

stop the bucking action by pulling the Forward Speed Control (FSC) lever into the NEUTRAL- PARK position.

13. Disengage the blade drive when transporting

the machine across drives, sidewalks, etc. Nev-

er raise the mower deck while blades are rotating.

DANGER

Do not mow or dump grass within 5 feet (1.5 meters) of an embankment or retaining wall with drop off.

6

Safety Instructions

14. The maximum recommended slope operating angle is 15 degrees or 26% grade. When

operating the machine on a slope, reduce speed and use caution to start, stop, and maneuver. To prevent tipping or loss of control of the machine, avoid sharp turns or sudden changes in direction. Do not operate the machine on a

slope greater than 15 degrees.

15. Never adjust cutting height with the engine running. Before adjusting cutting height or

servicing, disengage the blade clutch (PTO),

stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat.

NOTE: A blade/blower brake should normally stop drive line rotation within ve (5) seconds of disengaging the PTO clutch.

16. For side discharge mower decks, do not oper- ate with the grass deector shield removed. Keep the deector in the lowest possible position.

17. When using the tilt-up deck, observe the fol-

lowing:

a. Do not move tractor with deck in tilt-up

position.

b. Never tilt body forward with deck in tilt-up

position.

18. For GHS equipped models, do not operate the

machine with the grass catcher in the DUMP position or with the back door OPEN. Dan-

gerous projectiles may be thrown out of the discharge chute or the back of the grass catcher.

20. If the cutting blades strike a solid object or the

machine begins to vibrate abnormally, immedi-

ately disengage the blade clutch (PTO), stop the engine, and wait for all moving parts to stop. To prevent accidental starting, discon-

nect the spark plug wires. Thoroughly inspect the mower and repair any damage before restarting the engine and operating the mower. Make sure cutter blades are in good condition and blade nuts are torqued to 60 lb·ft (81 N·m) for gear driven decks, and blade bolts torqued to 70 lb·ft (95 N·m) for belt driven decks.

21. Do not touch the engine or mufer while

the engine is running or immediately after stop ping the engine. These areas may be hot enough to cause serious burns.

22. When leaving the machine unattended, disen-

gage the blade clutch (PTO), stop the engine, and remove the key.

INSTRUCTIONS FOR HI-DUMP® OPERATION

1. When operating the Hi-Dump®, the operator should be in the seat with feet on the footrests, the FSC in NEUTRAL-PARK position and the parking brake engaged.

2. To avoid tipping over, the tractor should be parked on LEVEL GROUND when raising/ dumping the catcher with Hi-Dump®.

3. Make sure bystanders stay clear of the area when the Hi-Dump® is operating.

4. Do not attempt to use the optional dump bag or dump into any other bag with the Hi-Dump®.

19. In case of a clogged or plugged mower deck

or GHS catching system:

a. Disengage the blade clutch (PTO), engage

the parking brake, and turn the engine off before leaving the seat.

b. LOOK to make sure blade drive shaft and

blower drive pulley movement has stopped before trying to unclog the system.

c. Disconnect the spark plug wires.

d. Never place hands under the deck or in the

GHS blower - use a stick or similar tool to

remove clogged material.

7

Safety Instructions

MAINTENANCE

1. To prevent accidental starting of the engine when servicing or adjusting the machine, remove the key from the ignition switch and disconnect the fuel solenoid wire [diesel engines] or the spark plug wire(s) [gasoline engines].

2. To reduce re hazards, keep the engine free of grass, leaves, excessive grease, and dirt.

3. Keep all nuts, bolts, and screws tight to ensure the machine is in a safe, working condition. Check the blade mounting nuts frequently, making sure they are tight.

4. Perform only maintenance instructions de- scribed in this manual. Unauthorized main-

tenance operations or machine modications

may result in unsafe operating conditions.

5. If the engine must be running to perform a main - tenance adjustment, keep hands, feet and clothing away from moving parts. Do not wear

jewelry or loose clothing.

6. Always use the proper engine service manual when working on the engine. Unautho-

rized maintenance operations or modications

to the engine may result in unsafe operating conditions.

7. Altering the equipment or engine in any manner which adversely affects its operation, performance, durability or use will VOID the warran- ty and may cause hazardous conditions.

11. Use care when charging the battery or per-

forming maintenance on the battery and electrical system:

a. Make sure the battery charger is unplugged

before connecting or disconnecting cables to the battery.

b. Charge the battery in a well-ventilated

space, so gases produced while charging can dissipate. Make sure the battery vents in the caps are open.

c. Keep sparks, ames, and smoking materi-

als away from the battery at all times. To avoid sparks, use care when removing battery cables from posts.

d. Disconnect both battery cables before un-

plugging any wiring connectors or making repairs on the electrical system.

12. Do not attempt to service the engine fuel injection system, which contains high pressure fuel and may cause injury if mishandled. For service of the pressurized fuel system, including the fuel pump module, fuel lines, and fuel injectors, contact your Walker dealer or authorized Kohler service dealer.

IMPORTANT: Keep all applicable manuals immediately accessible to anyone who may operate or service this machine.

8. Never attempt to disconnect any safety devices or defeat the purpose of these safety devices.

9. Do not change the engine governor settings or overspeed the engine. The governor has been factory-set for maximum-safe engine operating speed.

10. Use genuine factory replacement parts. Substitute parts may result in product malfunc-

tion and possible injury to the operator and/or

others.

INSTRUCTIONS FOR HI-DUMP® MAINTENANCE

1. When the Hi-Dump® is in the RAISED position

for access to the engine or drivetrain, ALWAYS ENGAGE the safety lock before service or repair work. Remember to DISENGAGE the lock before resuming operation of the Hi-Dump® (to avoid damaging the lock mechanism).

2. With the Hi-Dump® in the normal operating position (catcher down), the catcher cannot be

manually raised. In the case of a dead battery, use the auxiliary power terminals to charge/

boost the battery to raise the Hi-Dump®.

8

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 Part Number: 8600-5

Operation Decal: Hi-Dump® Operation Location: Switch Cover Part Number: 8400-9

Safety Decal: Auxiliary Power Terminals Location: Auxiliary Power Terminal Plate Part Number: 8400-7

EQUIPPED

WITH

8400-16

HI-DUMP

Decal: Decal, Hi-Dump® Location: Rear Bumper

Part Number: 8400-16

9

Safety Decal: Safety Lockout Arm Location: Lower Lift Arm

Part Number: 8401-9

®

Assembly Instructions

INSTALLING A21 HI-DUMP® ON THE TRACTOR

1. Disconnect battery. Always disconnect the neg-

ative (-) terminal rst.

2. Unplug catcher harness at the rear of the catcher box. Unbolt the gas spring at both ends. Remove the catcher assembly—retain the hardware, as it will be reused.

NOTE: If installing on tractor with Power Dump,

remove actuator, mount, electrical harness and switch.

NOTE: This step will be more easily accomplished with the help of an assistant.

3. Remove the body chute from the tractor body.

Install the new (longer) body chute.

NOTE: If installed on a tractor equipped with a 10 in. blower, order body chute, P/N 8430. If installed on a tractor equipped with a 10-1/2 in.

blower, use body chute 8430-1 (included).

NOTE: It may be necessary to enlarge the hole in the body in order for the chute to t.

4. FOR LIQUID COOLED UNITS ONLY: Remove the coolant recovery tank from the mount. Remove tank mount from the bumper—retain the hardware, as it will be reused.

and remove the instrument panel guard—retain all hardware, as it will be reused.

8. Remove the precleaner tube. Loosen hose clamp and remove three (3) shock mount nuts (two in front, one in rear); retain the hardware, as it will be reused.

9. Remove the two (2) nuts that attach the precleaner tube support arm to the fuel tank strap (chassis) and remove and discard the

precleaner tube support arm. Push bolts back

against the fuel tank but do not remove the bolts

or the PTO Blade Clutch Mount.

NOTE: For Model T25i only, remove two bolts mounting fuel pump module on rear upright bracket and stow pump assembly to the side.

10. Grind paint around the hole in the jackshaft mount to expose metal for ground (black wire) as shown in Grind Paint on Jackshaft Mount photo.

Grind Paint around Hole

on Jackshaft Mount

5. Remove rear bumper and discard—retain the hardware, as it will be reused.

6. Remove the two (2) body bumpers mounted on the back of the front body that the catcher

contacts when lowered. Install new bumper (P/N 7847) on the right side, as shown in Install

Body Bumper photo.

Body Bumper

P/N 7847

Install Body Bumper

7. Unbolt the instrument panel from the chassis,

Grind Paint on Jackshaft Mount

11. FOR AIR-COOLED MODELS ONLY: Use a

pipe clamp to keep the chassis uprights from spreading to ease installation, as shown in

Install Pipe Clamp to Keep Chassis from Spreading photo.

(See photo on next page)

10

Assembly Instructions

Pipe Clamp

LH Chassis

Upright

Install Pipe Clamp to Keep Chassis Uprights

from Spreading

12. Carefully, set the Hi-Dump® assembly on the

chassis being careful not to knock the PTO

Blade Clutch Mount loose (off of the mounting bolts, RH side). Make sure the Hi-Dump® wire harness is not damaged as the assembly is positioned on the chassis frame.

RH Chassis

Upright

15. Route the harness under the chassis, and back

up in front of the PTO safety switch. Remove

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

cable clamp.

IMPORTANT: To avoid damage to the wire harness, be sure the wire harness is pulled snug under the chassis.

Wire Harness Routed

Under Chassis

Install Cable Clamp

P/N 5832

NOTE: This step will be more easily accomplished with the help of an assistant, or a well-

balanced lift/hoist.

13. If a pipe clamp was used, it can now be removed.

14. Using a at head screw driver, push the two (2) bolts (partially removed in step 9) through the fuel tank saddle and install the Hi-Dump®

spacer (P/N 8400-77) over the bolts, then the

Hi-Dump® frame upright. Reinstall nuts, and tighten securely, as shown in Install RH Hi-

Dump® Frame photo.

NOTE: The spacer (P/N 8400-77) is not used

on the MT30i.

Hi-Dump

Frame Upright

PTO Blade

Clutch Mount

Install Cable Clamp to PTO Safety Switch Mount

16. Mount new relay switch (P/N 6941-8) and bracket with one 10-24 x 1/2 (F026) screw, one 1/4 star lock washer (F185), and one 10-

24 (F002) keps nut to the jackshaft mount as shown in Install Relay Switch illustration.

RED

F026

F185

G

To Time Delay Harness

F002

Jackshaft

Assembly (Ref)

11

Spacer P/N

8400-77

Install RH Hi-Dump® Frame

Mounting

Bolt

Install Relay Switch

Assembly Instructions

17. Plug the wire harness into the relay and run

the Hi-Dump® harness along the tractor’s main harness to the battery as shown in Route Wire Harness photo. Use three 7 in. cable ties to

hold in place. Plug connector on relay harness

into connector on time delay harness.

NOTE: It is recommended to use dielectric

grease on the wire harness connectors to ensure a good connection, and to prevent dust and moisture from entering the plugs.

Wire Harness

Route Wire Harness

18. Connect the battery cables and the Red (+) and Black (-) leads of the Hi-Dump® to the battery.

Connect the Red (+) rst.

NOTE: Connect the positive (+) leads rst. Install a 4 in. cable tie, on both battery terminal

insulators.

19. Clamp the left front Hi-Dump® mount (at the

instrument panel guard mount point) ush with

the chassis using a c-clamp as shown in Clamp LH Front Hi-Dump® Mount photo. Install the

5/16-18 x 3/4 (F034) hex bolt and the 5/16-18

(F009) whiz locknut. Reinstall the instrument panel and panel guard using existing hardware removed earlier.

NOTE: If the Hi-Dump® mounting hole is not

present in the chassis, it will be necessary to

drill a 5/16 in. hole using the Hi-Dump® mount as a guide. Install hardware through the Hi-

Dump® frame and tractor chassis and hand tighten.

20. Turn the ignition switch to the ON (RUN) position and use the LIFT control switch to raise the HiDump® to the full UP position.

21. Using a tapered (drift) punch, align the left-rear Hi-Dump® mounting holes to the chassis as shown in Align Mounting Holes photo. Using existing hardware, install bolt and nut in the front hole and hand tighten. Remove punch and install second nut and bolt. Leave bolts loose,

DO NOT tighten.

Tapered Punch

Align Mounting Holes

22. Using the tapered punch in the lower hole of the rear upright mount in front of tailwheel pivot housing, align the top hole as shown in Install Hardware in Rear Upright Mount illustration and install hardware.

IMPORTANT: To avoid damage, top bolt (carriage head, F420) must be installed with

head towards hydraulic cylinder.

Clamp LH Front Hi-Dump® Mount

Tail Wheel Pivot

Housing (Ref)

Rear Upright

Mount Bolts

Install Hardware in Rear Upright Mount

Carriage Bolt

Installed With Head

Toward Cylinder

Rear Upright

Mount

12

Assembly Instructions

NOTE: If there is a gap between the rear

upright mount and the chassis frame, install the

optional shim (P/N 8400-39) for best t.

NOTE: For Model T25i only, reinstall the fuel pump module at the same time.

23. Using the tapered punch align the front holes of the right rear mount holes and install a bolt (from the inside to outside) through the rear precleaner mount, Hi-Dump® and chassis. Install

nut nger tight. Remove the tapered punch and

install a bolt (from outside to inside) through the front mount holes of the chassis, Hi-Dump® and

rear precleaner mount and install nut nger tight

(using existing hardware removed earlier).

24. Using the tapered punch, align the holes where the two (2) bumper upright supports connect to the chassis and install existing hardware, as

shown in Align Bumper Upright Supports to

Chassis photo.

IMPORTANT: A production change was made

at tractor S/N 2018-151222, and A21 S/N 20185402 that enlarged the hole from 3/8 in. to 7/16 in. It is possible that the Hi-Dump® kit bumper

and the tractor chassis could have differing hole

dimensions. If hole dimensions are different, drill the smaller hole to 7/16 in.

28. Place the catcher assembly on the Hi-Dump®

frame as shown in Install Catcher Box As- sembly photo.

Catcher Pivot Points

Outside Hi-Dump® Frame

Install Catcher Box Assembly

29. Install the two (2) new catcher pivot plates (P/N

7517-3), as shown in Install Catcher Pivot Plates illustration. Hand tighten the bolts and nuts reusing existing hardware.

Bumper Upright

Support

Tapered Punch

Used to Align

Mount Hole

Align Bumper Upright Supports to Chassis

25. Tighten all bolts and nuts.

26. Reinstall the precleaner tube and hose, using existing hardware. Ensure hose clamps are tight.

27. Lower the front body. Turn the ignition switch to the ON (RUN) position and use the lift control switch to lower the Hi-Dump® to within 6-8 in. (15-20 cm) of the DOWN position.

Catcher Pivot

Plate

F038

Install Catcher Pivot Plates

30. Using the LIFT switch, lower the assembly to

the full down position. Align the catcher box to

the GHS body chute (blower discharge chute).

Make sure there is clearance on all sides. Tighten the catcher pivot plate hardware installed in the previous step.

31. Attach the RH and LH channel angles (P/N

8404-12 and 8404-13) to the catcher frame

support with the two (2) 1/4-20 x 1/2 (F029) hex bolts and two (2) 1/4-20 (F004) keps nuts attaching the front of the channel nger tight.

F041

13

Assembly Instructions

DRILL 3/8" DIA. THRU. TYP .2

1/4" TYP .2

4" TYP .2

FRONT OF CATCHER BOX

VIEW FROM BOTTOM OF CATCHER BOX

REAR OF CATCHER BOX

NOTE: The channel angle with the ball stud mount attaches to the left side.

RH Channel

Angle

LH Channel

Angle

Ball Stud on

Channel Angle

Install Power Dump Arm Channel Angles

32. For installing the power dump cables (P/N 8623-2), drill two (2) 3/8 in. holes approximately 1/4 in. inside the radius of the catcher box

and 4 in. from the opening of the catcher box as shown in Drilling Dimensions for Power Dump Cables photo.

Front of Catcher Box

34. Remove existing lower arms (outside of catcher

box) and install new Lower Power Dump Arms (P/N 8607-10) on both sides.

35. Install new inner power dump arms (P/N 8623-6 RH and P/N 8623-7 LH) on both sides

and orient each one as shown in Inner Power Dump Arm photo.

Inner Power

Dump Arm

Install Inner Power Dump Arm

36. Assemble door springs to spring hooks (attached to torsion bar) and attach extension spring clevis end to inner power dump arm, as

shown in Assemble Door Springs to Spring Hooks and Attach Extension Spring Clevis illustration.

4 in.*

1/4 in.*

Rear of Catcher Box

* Typical Two Places

View from Bottom of Catcher Box

Drill 3/8 in Dia.

Hole*

Drilling Dimensions for Power Dump Cables

33. Remove the cotter pins on both ends of the

torsion bar (inside catcher box). Insert spring

hook ends on both ends of torsion bar and reinstall bar with new cotter pins.

(See next page)

14

Assembly Instructions

7 1/2”1 5/16”

DRILL 3/16” DIA.

HOLES

8”

Lower Arm

P/N 8608-9 Torsion Bar

Drill 3/16 in.

Holes

Cable Guide

Extension

Spring Cable

Inner Power

Dump Arm

Hole in

Catcher Box

Hi-Dump®

Frame

Spring Hook

on Torsion Bar

Cable Guide

Cable

Assembly

Ball Joint

Assemble Door Springs to Spring Hooks and

Attach Extension Spring Clevis

37. Attach cable assembly to inner power dump

arms with clevis pin, as shown in Assemble

Door Springs to Spring Hooks and Attach Extension Spring Clevis illustration. Install

threaded end of cable assembly through each hole. Attach ball joints to cable ends. Attach ball joints to Hi-Dump® frame bracket.

38. Tilt the catcher to the full back position using

the DUMP switch. Check the tension of both cables. The tension should be equal. Adjust accordingly with the ball joints. Tighten the jam nuts.

39. Drill holes in both sides of the catcher box

(as shown in Drilling Dimensions for Cable

Guide Installation) to install cable guides (P/N

7620-6) inside catcher.

8 in.

1-5/16 in.

7-1/2 in.

Drilling Dimensions for Cable Guide Installation

40. Install guides on both sides, using the two (2) 10-24 x 3/4 (F028) screws, two (2) 3/16 Rivet

Backup Washer (F085), and two (2) 10-24 (F002) keps nuts as shown in Install Cable Guides photo.

Cable Guide

Install Cable Guides

41. Plug the grass catcher harness into the main harness. With the ignition switch in the ON

(RUN) position and the PTO engaged, check the operation of the Powerl®.

15

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. Tie the hose to the frame using two 7 in. cable ties. Make sure the cable ties are not so tight as to

restrict coolant from owing through the hose.

NOTE: It may be necessary to shorten the

recovery tank hose by approximately 3 in. (7.6 cm)

43. Check the lift operation of the Hi-Dump®. The front pivot should lift approximately 1 in. (2.5 cm) before the rear starts to rise as shown in

Check Lift Operation photo. If this does not

occur the control rods will need to be adjusted.

Catcher Box

Mount Frame

Hi-Dump

Frame

NOTE: The control rods and ball joints have RH and LH threads. They can be adjusted by loosening the jam nuts and turning the rod. If the front of the catcher raises more than 1 in. (2.5 cm) before the back raises, shorten the control rods. The rods need to be adjusted equally. If the back of the box raises before the front raises 1 in. (2.5 cm) or the back of the box is slightly raised in the full down position (not contacting the rear bumpers), lengthen the control rods. The rods need to be adjusted equally.

Front Pivot Raises

1 in. Before Rear

Raises

Check Lift Operation

Catcher

Box

Front Pivot

44. Use the LIFT and DUMP control switches to make sure the system operates properly.

16

Operating Instructions

HI-DUMP® OPERATION

The operator raises and dumps the GHS catcher

box while sitting in the seat. Two toggle switches operate independent hydraulic cylinders to raise, lower, and dump the catcher. The back door automatically opens and closes during the dump cycle.

NOTE: The ignition switch must be in the ON (RUN) position for the Hi-Dump® system to operate.

Toggle Switch

(Lift)

(+) Auxiliary

Power Terminal

NOTE: With the Hi-Dump® mechanism in the nor- mal operating position (catcher down), the catcher can be manually raised. In the case of a dead

battery, use the auxiliary power terminals to charge/

boost the battery to operate the Hi-Dump®.

CAUTION

The operator should be in the seat with the machine in the NEUTRAL-PARK Position and the parking brake engaged and bystanders stay clear when the Hi-Dump® is operating. To avoid tipping over, the machine should be parked on LEVEL GROUND when raising/dumping the catcher with Hi-Dump®. Do not attempt to use the optional dump bag or any other bag with the Hi-Dump®.

WARNING

Toggle Switch

(Dump)

(-) Auxiliary

Power Terminal

Lift/Dump Control Switches and

Auxiliary Power Terminals

Hold the Lift toggle switch UP or DOWN to RAISE or LOWER the catcher. Hold the Dump toggle switch UP to DUMP the catcher and DOWN to return to the normal operating position. The catcher

may be dumped at any raised position (Normal Operating - Intermediate - Fully Raised).

NOTE: If grass tends to hang up in the catcher after raising the catcher with the Hi-Dump®, “jiggle” the steering levers and make the tractor bounce a little to unstick the grass and make it slide out of the catcher.

When the Hi-Dump® is in the RAISED position for access to the engine and drivetrain, always ENGAGE the safety lock before service or repair work. Remember to DISENGAGE the lock before resuming operation of the Hi-Dump® (to avoid damaging the lock mechanism).

Safety Lockout

Arm Engaged

Safety Lockout Arm Engaged Position

17

Operating Instructions

Safety Lockout

Arm Stowed

Safety Lockout Arm Disengaged Position

18

Maintenance Instructions

CHECKING OIL LEVEL

To check the oil in the hydraulic power unit, remove the plug from the unit and insert an allen wrench (as a dipstick) until it touches the reservoir mounting bolt

that runs through the center of the reservoir. Oil level should be approximately 1/2 in. to 3/4 in. above

the bolt. To add hydraulic oil, use Chevron Rykon

Premium Oil ISO 68 or equivalent. System capacity

is 32 oz. (.95 liters)*.

NOTE: To completely ll, or rell, the hydraulic

system, DO NOT ll with 32 oz. initially. When ll- ing, add about 22 oz., operate the system and allow

oil to ow throughout the system. Then, continue lling the reservoir with the additional 10 oz.

LUBRICATION

WARNING

DO NOT attempt to lubricate the machine with the tractor engine running. Disengage the PTO clutch, shut off the machine, and remove the ignition key.

Proper lubrication is an important maintenance procedure. It reduces wear and makes the machine

quieter and easier to operate.

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 completely empty

19

Maintenance Instructions

Ident Lubrication No. No. Location Type Places

1 Hi-Dump® Catcher Frame Grease 2 2 LH/RH Rear Pivots Grease 2 3 Catcher Pivot Arm Grease 1 4 Hydraulic Power Unit Oil 1

1

3

4

2

A21 Lubrication Points Diagram

20

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.

● To adjust clearance, loosen the bolts on both of the catcher pivot plates (P/N 7517-3) and position the catcher for proper clearnace with the body chute. Re-tighten the pivot plate bolts.

Door Opening Cable Tension

● Tilt the catcher to the full back position using the DUMP switch. Check the tension of both cables. The tension should be equal. Adjust accordingly with the ball joints. Tighten the jam nuts.

Control Lift Rod

● Check the lift operation of the Hi-Dump®. The front pivot should lift approximately 1 in. (2.5 cm) before the rear starts to rise as shown in

Check Lift Operation photo. If this does not

occur the control rods will need to be adjusted.

Catcher Box

Mount Frame

Hi-Dump

Frame

NOTE: The control rods and ball joints have RH and LH threads. They can be adjusted by loosening the jam nuts and turning the rod. If the front of the catcher raises more than 1 in. (2.5 cm) before the back raises, shorten the control rods. The rods need to be adjusted equally. If the back of the box raises before the front raises 1 in. (2.5 cm) or the back of the box is slightly raised in the full down position (not contacting the rear bumpers), lengthen the control rods. The rods need to be adjusted equally.

Front Pivot Raises

1 in. Before Rear

Raises

Check Lift Operation

Catcher

Box

Front Pivot

21

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22

A21 HI-DUMP® ASSEMBLY

ITEM PART DESCRIPTION NO. NO. NO. REQ’D

A21 Hi-Dump Kit/10.0

1 8607-10 Lower Arm, Power Dump 2 2 7620-3 Pivot Bushing (1/2 x 9/16) 4 3 7523-2 Clevis Pin W/Hole (1/4 x 5/8) 4 4 8623-6 Inner Power Dump Arm, RH 1 5 8623-3 Extension Spring Cable 2 6 5221-2 Ext Spring (3/4 x 3-1/2”) 2 7 8623-5 Torsion Spring Hook 2 8 8623-7 Inner Power Dump Arm, LH 1 9 7620-6 Cable Guide 2 10 8623-2 Power Dump Cable, 10.0 2 11 5552 Ball Joint (1/4-28) 2 12 8402-3 Backup Plate 1 13 8404-12 Channel Angle/RH 1 14 8404-13 Channel Angle/Hi-Dump/LH 1 15 5841 Retainer Washer (3/8 x 1-1/4) 4 16 8845 Rubber Bumper (30mm OD x 40mm) 3 5/16-18 Female 17 8404-6 Clevis Pin (1/2 x 1-1/2) 1 18 7517-3 Catcher Pivot Plate 2 19 7620-15 Roller Wheel 2 20 8402-9 Catcher Pivot Arm 1 (Includes Items # 19, 21, 55 & F562) 21 5830 Grease Fitting 5 22 8404-5 Clevis Pin (1/2 x 1-1/4) 1 23 8402-4 Upper Cylinder Mount Arm 1 24 8402-1 Catcher Frame/Hi-Dump 1 (Includes Items # 21 & 27) 25 7845-1 Rubber Bumper (1.375 x .750) 2 26 8401-4 Upper Pivot Shaft 1 27 8201-3 Fiberglide Bearing 4 28 8401-5 Pivot Arm (Includes Item # 29) 1 29 8401-9 Decal, Safety Lockout Arm 1 30 5683 Pivot Bearing 2 31 8401-1 Torsion Spring (1-1/2) 1 32 8401-6 Spring Bushing 1 33 8401-3 Safety Lockout Arm 1 34 8401-2 Safety Lockout Spring 1 35 8400-3 Rear Pivot/LH 1 (Includes Items # 21 & 30) 36 5214-10 Ball Joint (1/2-20) Hi Strength 2 37 8400-16 Decal, Hi-Dump 1 38 7047-5 Mount Plate 1** 39 8404-7 MTL Adapter Bracket 1* 40 8430-1 Body Chute, Hi-Dump (10.5) 1 41 8400-10 Auxiliary Power Terminal Plate 1 (Includes Item # 42) 42 8400-7 Decal, Electrical Jumper Warning 1 43 8600-23 Decal, Danger/Body Latch 1 44 8400-19 Switch Mount 1 45 8400-9 Decal, Hi-Dump Operation 1 46 8400-14 Switch Cover (Includes Item # 45) 1 47 8401-13 Bumper/Hi-Dump Mount 1 (Includes Item # 37) 48 7854 Plastic Tip, Red 1 49 7383-2 Body Latch Hook 1 50 7847 Rubber Bumper (1.5 OD x 1.0) 1 51 8400-2 Rear Pivot/RH 1 (Includes Items # 21 & 30)

23

ITEM PART DESCRIPTION NO. NO. NO. REQ’D

52 8402-8 Control Lift Rod 2 53 5214-11 Ball Joint (1/2-20LH) Hi Strength 2 54 8403-18 Pump Guard 1 55 7620-16 Roller Bushing 2 56 7031-4 Tube Support Arm/Hi-Dump 1 57 8400-77 Spacer/Hi-Dump 1*** 58 8400-39 High Dump Upright Shim 1

Fasteners

F002 10-24 Keps Nut 10 F003 1/4-28 Hex Nut 2 F004 1/4-20 Keps Nut 8 F009 5/16-18 Whiz Locknut 15 F012 3/8-16 Keps Nut 12 F016 1/2-13 Self-Locking Nut 2 F025 10-24 x 3/8 PPHMS 1 F027 10-24 x 5/8 PPHMS 2 F028 10-24 x 3/4 PPHMS 4 F029 1/4-20 x 1/2 Hex Bolt 6 F034 5/16-18 x 3/4 Hex Bolt 6 F035 5/16-18 x 1-1/4 Hex Bolt 2 F037 10-24 x 5/8 PTH Screw 2 F038 3/8-16 x 1 Hex Bolt 6 F039 3/8-16 x 1-1/4 Hex Bolt 4 F040 3/8-16 x 1-1/2 Hex Bolt 3 F041 3/8-16 x 1-3/4 Hex Bolt 2 F048 1/2 SAE Washer 1 F049 5/16 SAE Washer 2 F052 5/16 Ext. Star Lock Washer 1 F068 1/8 x 1 Cotter Pin 2 F069 3/32 x 1/2 Cotter Pin 4 F085 3/16 Rivet Backup Washer 4 F111 1/8 x 3/4 Cotter Pin 2 F151 3/8-16 x 7/8 Hex Bolt 2 F183 .312 x .700 x .074 Washer 2 F208 5/16-18 x 2-1/4 Hex Bolt 5 F241 .375 x .875 x .10 Washer 6 F287 1/4-28 Keps Nut 2 F385 1/4 x 1-1/4 Roll Pin 1 F395 1/4-20 x 2-1/4 FHA Screw, SS 4 F396 10-24 x 1-1/4 PPH Bolt 2 F398 1/4-20 x 2 Hex Bolt 2* F399 1/2-13 x 3-1/4 Hex Bolt 2 F402 1/4-20 x 2 PFH Bolt 2** F405 3/8-16 x 1-1/2 FHA Screw, SS 1 F420 5/16-18 x 1-1/4 Carriage Bolt 1 F440 1/2-20 Jam Nut RH 2 F441 1/2-20 Jam Nut/Left Hand 2 F562 5/16-18 x 1 Set Screw 1 F570 3/8-16 Flange Top Lock Nut 4

* Model MTL Only ** Model MDD Only *** Not Used on MT30i

 ∆ UseOptionalShimasNeededtoClose

Gap With Chassis Frame

Beginning S/N 2018-5524

Use only genuine Walker® replacement parts.

∆

F396

F385

F009

F012

53

53 F441

52

F441

52

F012

F405

F040

F009

F034

F395

F069

F111

F034

F111

F241

F151

36

F040

F009

F208

F039

F440

F012

36

F034

F208

F016

F002

F012

F399

21

F035

F398

F402

F012

F002

F009

F012 F009

F038

F009

F420

F025

F038

F037

44

42

47

46

F035

F009

F016

F048

F040

F009

F039

F399

F208

21

35

15

16

58

56

39

38

30

29

31

32

33

25

16

17

16

15

REUSE

14

15

21

27

21

28

22

23

25

12

24

34

26

51

45

57

F002

41

43

11

F003

F287

3

7

10

F069

F049

18

40

F009

REUSE

50

48

49

50

F009

F034

54

F034

F052

F034

27

REUSE

F562

F004

21

19

55

19

55

20

37

REUSE

F009

F420

58

CHASSIS

(REF)

47

(REF)

13

1

2

4

3

5

8

3

9

F085

F028

6

5

1

2

REUSE

7

F068

F069

F004

F029

F002

F241

F570

REUSE

F041

F038

F241

A21 HI-DUMP® ASSEMBLY

Beginning S/N 2018-5524

Use only genuine Walker® replacement parts.

24

A21 HI-DUMP® HYDRAULIC AND ELECTRICAL COMPONENTS

ITEM PART DESCRIPTION NO. NO. NO. REQ’D

Hi-Dump Kit – Hydraulic/Electrical

1 5833 Cable Clamp (1/4) 3 2 8440-1 Catcher Adapter Harness 1 3 8404 Dump Cylinder 1 4 8403-7 90° Fitting 12 5 5975-3 Cable Tie (50# x 7”) 1 6 8403-5 Hydraulic Hose, Catcher Box 1 Dump (67.5) 7 8403-6 Hydraulic Hose, Catcher Box 1 Dump (73.5) 8 5835 Cable Clamp (3/4) 6 9 8403-3 Hydraulic Hose, Lift/Rear (11.5) 1 10 8404-1 Lift Cylinder 1 11 8403-2 Hydraulic Hose, Lift/Front (16) 1 12 5975-7 Cable Tie (50# x 11”) 2 13 8404-2 Hydraulic Valve Box 1 14 8403-4 Hydraulic Hose, 1 Valve to Pump (17-1/2) A/UP 15 8403-20 Hydraulic Hose, 1 Valve to Pump (17-1/2) B/DN 16 5975-1 Cable Tie (18# x 3-3/4”) 11 17 8403-19 Hydraulic Power Unit 1 18 8440-7 Battery/Relay Harness 1 19 5832 Cable Clamp (1/2) 1 20 8401-7 Junction Block (10-32) 2 21 7941 Circuit Breaker 40 Amp 1 (Auto Reset/Sealed) 22 8404-9 Plastic Cover/Black 1 23 8404-8 Plastic Cover/Red 1 24 6623-22 Toggle Switch/SP 1 25 6623-21 Toggle Switch/DP 1 26 8440-3 Jumper Wire 1 27 8440-8 Wire Harness/Hi-Dump 1 28 7833 Cable Clamp (7/8 x 1/4) 1 29 8440-6 Relay Harness 1 30 8553 Splice Tap (18-14 Ga.) 1 31 8440-10 Wire Assembly (3”) 1 32 6941-8 Relay Switch 60/40 Amp 3

ITEM PART DESCRIPTION NO. NO. NO. REQ’D

Fasteners

F002 10-24 Keps Nut 9 F004 1/4-20 Keps Nut 2 F025 10-24 x 3/8 PPHMS 11 F026 10-24 x 1/2 PPHMS 3 F027 10-24 x 5/8 PPHMS 4 F106 3/8-16 x 5/8 Hex Bolt 2 F185 1/4 Int. Star Lock Washer, SS 1 F232 10-32 Keps Nut 6 F397 1/4-20 x 3-3/8 Hex Bolt 2 F418 10-24 x 7/8 SHC Screw, GR5 (SS) 2

25

Beginning S/N 2018-5524

Use only genuine Walker® replacement parts.

A21 HI-DUMP® HYDRAULIC AND ELECTRICAL COMPONENTS

F027

F418

23

22

19

To Time Delay Harness

F025

F002

25

RED

21

20

RED

F002

16

F

F397

F026

32

16

F025

F397

28

1

4

CONNECT TO

RED WIRE

1

A

1

2

F025

7

8

F025

6

F025

DETAIL A

3

4

5

GRN

DETAIL C

BLK BLK

BLU

DETAIL B

BLK/WHTBLK/WHT

BLK BLK

RED/YEL RED/YEL

BLK BLK

RED/YEL

DETAIL D DETAIL E DETAIL F

RED RED

GRN

RED/YELBLU

RED RED

RED/YEL RED/YEL

8

DETAIL G

RED

BLK

31

INSERT RED WIRE FROM 8440-7

RED

BLU BLU

RED RED

GRN GRN

DETAIL H

BLK BLK

RED RED

GRN

BLK

BLK/WHTBLK/WHT

DETAIL I

RED

BLU

F026

32

H

I

F002

B

To Pump

F106

C

F025

16

F025

15

14

4

13

F004

9

D

E

24

16

F232

26

F002

F232

BLK

16

29

BLK

18

32

G

F002

F026

F185

27

16

17

4

12

11

4

10

To Harness

JACKSHAFT ASSEMBLY (FOR REFERENCE)

4

12

16

BLK

TRACTOR CHASSIS

Beginning S/N 2018-5524

Use only genuine Walker® replacement parts.

30

CONNECTING 8440-10 to TIME DELAY HARNESS

To Relay Harness

END VIEWS ARE SHOWN FROM BACK OF PLUG

26

MAINTENANCE AND SERVICE RECORD SHEET

DATE SERVICE ENGINE ITEM HOURS

______________________________________________________________________________________________________________

27

LIMITED WARRANTY

FOR WALKER

A21 HI-DUMP

What this warranty covers, and for how long:

1.

Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) year after date of sale to the original retail purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (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. All parts and components of the Walker Hi-Dump® are covered by this warranty.

What this warranty does not cover:

2.

A. This warranty does not cover defects caused by depreciation or damage caused by normal wear, accidents, improper maintenance, improper use or abuse of the product, alterations, or failure to follow the instructions contained in the Operator’s Manual for operation and maintenance.

B. The customer shall pay any charges for making service calls and/or for transporting the attachment to and from the place where the inspection and/or warranty work is performed.

®

How to obtain service under this warranty:

3.

Warranty service can be arranged by contacting the dealer where you purchased the machine or by contacting Walker Manufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to verify warranty coverage.

Warranty limitation:

4.

A. THERE IS NO OTHER EXPRESS WARRANTY. ANY WARRANTY THAT MAY BE IMPLIED FROM THIS PURCHASE INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE DURATION OF THIS WARRANTY AND TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. Some states do not allow limitations on how long an

implied warranty lasts, so the above limitations may not apply to you.

B. WALKER WILL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES AND/OR EXPENSES IN CONNECTION WITH THE PURCHASE OR USE OF THE MACHINE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not apply to you.

C. Only the warranty expressed in this limited warranty shall apply and no dealer, distributor, or individual is authorized to amend, modify, or extend this warranty in any way. Accordingly, additional statements such as dealer advertising or presentations, whether oral or written, do not constitute warranties by Walker, and should not be relied upon.

D. This warranty gives you speciﬁc legal rights, and you may also have other rights which vary from state to state.

28

WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614

Walker A21 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual