Walker B23 Operator's Manual


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Walker B23 Operator's Manual | Manualzz

Operator’s Manual

Safety, Assembly, Operating, and Maintenance Instructions

Please Read and Save These Instructions

For Safety, Read All Safety and Operation

Instructions Prior to Operating Machine

Beginning S/N: 169308

P/N 4000-35

Foreword

Thank you. . .

for purchasing a Walker mower. Every effort has been made to provide you with the most reliable mower on the market, and we are sure you will be among our many satisfied 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! This manual is to be used in conjunction with the engine manufacturer’s manual for the specific engine on the mower model you have purchased. Before you operate your new mower, please read this entire manual. Some of the information is crucial for proper operation and maintenance of this mower - it will help protect your investment and ensure that the mower 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 clarification before operating or servicing this mower.

This manual covers Model B23 with the Kohler Command Pro CH680 (22.5 HP) gasoline engine.

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.

Specifications given are based on the latest information available at the time this manual was produced for a tractor with standard equipment. Optional equipment is available and may affect the standard specifications listed.

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.

Sincerely,

WALKER MANUFACTURING COMPANY

Bob Walker, Chairman

B23

General Information 1

Highlighted Information ......................................1

Glossary ...............................................................1

Identifying Number Locations ............................1

Engine Serial Number Location .........................2

Servicing of Engine and Drivetrain Components .....................................................................2

Specifications ......................................................3

Component Identification ...................................6

Safety Instructions 9

Before Operating .................................................9

Operating ............................................................11

Maintenance .......................................................13

Safety, Control, and Instruction Decals ...........14

Assembly Instructions 18

Setup Instructions .............................................18

Tire Installation (Tractor) ...........................................

18

Battery Service ..........................................................

18

Battery Charging ...................................................18

Battery Installation .................................................19

Mower Deck Assembly ..............................................

19

Deck Caster Wheels Installation ...........................19

Deck Discharge Deflector Shield Installation

(Side Discharge Models Only) ...............................20

PTO Shaft Guard Installation ................................20

Tilt-Up Roller Wheel Installation ............................20

Mower Deck Installation on Tractor ...........................

21

Deck Installation ...................................................21

Deck Leveling ........................................................23

Preoperating Checklist .....................................24

Operating Instructions 26

Operating Controls ............................................26

Ignition Switch ...........................................................

26

Engine Choke ...........................................................

27

Engine Throttle ..........................................................

27

Forward Speed Control (FSC) ..................................

27

Steering Levers .........................................................

27

Parking Brake ...........................................................

27

Blade Clutch Switch (PTO) .......................................

28

Table of Contents

Transaxle Lockout Arms ...........................................

28

Circuit Breaker and Fuses ........................................

28

Seat Panel Latch .......................................................

29

Rear Body .................................................................

29

Hourmeter .................................................................

29

Starting the Engine ............................................31

Adjusting Ground Speed and Steering ...........31

Engaging the Blade Drive .................................33

Stopping the Machine .......................................34

Adjusting Cutting Height ..................................35

Transaxle Lockout .............................................35

Recommendations for Mowing ........................36

Recommendations for Towing .........................37

Recommendations for Tilt-Up Deck

Operation and Transport ...................................38

Maintenance Instructions 39

Maintenance Schedule Chart ...........................39

Important Tips for Care of the

Kohler Engine ....................................................40

Fuel System ..............................................................

40

Starting/Stopping ......................................................

40

Cooling System .........................................................

40

Air Cleaner System ...................................................

40

Oil ..............................................................................

40

Lubrication .........................................................41

Engine Oil ................................................................

41

Engine Break-In Oil ...............................................41

Checking Engine Crankcase Oil Level ..................41

Changing Engine Crankcase Oil and Filter ...........41

Mower Deck Gearbox Lubrication .............................

43

Mower Deck Spindle Lubrication ..............................

43

DS52 or DS62 Mower Deck Lubrication ...................

44

Check Transaxle Fluid Level .....................................

44

Transaxle Oil and Filter Change ...............................

44

Grease Fitting and Oil Point Lubrication ..................

45

Cleaning .............................................................48

Engine Air Cooling System .......................................

48

Cooling Air Intake Screen ......................................48

Cylinder Head Cooling Fins ...................................48

Engine Air Cleaner System .......................................

49

Donaldson Radialseal™ Air Cleaner .....................49

Table of Contents

Grass Buildup in Mower Deck Housing ....................

51

Transaxle Housing ....................................................

52

Checking/Servicing ...........................................53

Security of Air Filtration Components ........................

53

Battery .......................................................................

53

Cleaning the Terminals ..........................................53

Charging the Battery .............................................54

Tire Pressure ............................................................

54

Wheel Nut Torque .....................................................

54

Sharpen Mower Blades .............................................

54

Drive Belts .................................................................

55

Mower Deck Gearbox Oil Seals ................................

55

Spark Plugs ...............................................................

56

Ignition Wires ............................................................

56

Fuel Lines and Clamps .............................................

56

Blade Brake Action ....................................................

56

PTO U-Joints ............................................................

56

Engine Starter ...........................................................

56

Safety Switch System ...............................................

56

Forward Speed Control Friction Lock .......................

57

Transmission Control Setting ....................................

57

Neutral-Park ..........................................................57

Straight Ground Tracking ......................................57

Replacing/Repairing ..........................................58

Drive Belts .................................................................

58

Remove Belts ........................................................58

Install Belts ............................................................58

Fuel Filter ..................................................................

60

Blade Overload Shear Bolts ......................................

60

Mower Blades ...........................................................

61

Adjustments .......................................................62

Transmission Control ................................................

62

Step 1 Steering Lever Position Adjustment ........62

Step 2 Steering Handle Adjustment ....................62

Step 3 - Neutral Function Adjustment ...................63

Step 4 - Straight Tracking Adjustment ...................63

Step 5 - Maximum Forward Speed Adjustment ....64

Step 6 - Forward Speed Control Friction

Adjustment ............................................................64

Tilt-Up Deck Adjustable Stop ....................................

65

B23

B23

General Information

HIGHLIGHTED INFORMATION

Walker Manufacturing recommends that any service requiring special training or tools be performed by an authorized Walker Mower 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 Mower are caused by disregarding basic safety precautions or specific 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 on page 9 for the meanings of

DANGER, WARNING, 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 definitions will help while using this manual:

● DECK is the mowing attachment mounted on the front of the tractor which includes the carrier frame, deck housing, belt or gear drive components, and cutter blades.

● FORWARD SPEED CONTROL (FSC) controls the maximum forward speed of the tractor; functioning as a cruise control.

● GROUND DRIVE refers to the dual transaxles which drive the main wheels.

● 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.

● RIGHT HAND (RH) refers to the right-hand side of the tractor when the operator is seated facing forward in the tractor seat.

● SIDE DISCHARGE (SD) discharges mowed material from the right side of the mower deck.

General Information

● SOFT START is an electronic module that smoothly engages the electric blade clutch.

● STEERING LEVERS steer the tractor by controlling the two transaxles.

● TRACTOR is the prime mover, including the engine, drivetrain, operator seat, and controls to operate the mower.

● TRANSAXLE transmits and controls power from the ground drive belt to the main drive wheel.

● TRANSAXLE LOCKOUT ARMS release the transaxles to permit freewheeling the tractor.

IDENTIFYING NUMBER LOCATIONS

The tractor serial number plate is affixed to the tractor body just below the left rear corner of the seat. The mower deck serial number plate is affixed alongside the angle iron framing on the LH side of the LH mower blade drive. Model and serial numbers are helpful when obtaining replacement parts and maintenance assistance. For ready reference, please record these numbers in the space provided.

Tractor Model No. ______________________

Tractor Serial No. ______________________

Deck Serial No. ______________________

Engine Model No. ______________________

Engine Serial No. ______________________

Date of Purchase ______________________

Fill In By Purchaser

1

General Information

Serial Number

Tractor Serial Number Location

Serial Number

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCATION

Refer to the engine manual that accompanies this manual or photo below for the location of the engine serial number.

The detailed servicing and repair of the engine, transaxles, and gearboxes are not covered in this manual. Only routine maintenance and general service instructions are provided. For the service of these components during the limited warranty period, it is important to find a local, authorized servicing agent of the component manufacturer.

Any unauthorized work done on these components during the warranty period may void the warranty.

If you have any difficulty finding an authorized 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

Service manuals are available for each of these components from their respective manufacturers as follows:

Kohler Engines

Transaxles

Kohler Company

Kohler, WI 53044

800-544-2444 www.kohlerengines.com

Hydro-Gear

1411 South Hamilton St.

Sullivan, IL 61951

877-728-7410 www.hydro-gear.com

Gearboxes (Deck) Peerless Gear

1555 South Jackson St.

Salem, IN 47167 USA

866-536-8310 www.peerlessgear.com

Serial Number

Engine Serial Number Location

B23

2

B23 Specifications

SPECIFICATIONS

ENGINE

Manufacturer/Model

Displacement cu. in. (cc)

Max. Power HP (kW)

Governed RPM

Max. Torque lb·ft (N·m)

Idle RPM

Spark Plug Type

Spark Plug Gap in. (mm)

Crankcase Capacity qt (L)

Crankcase Lubricant

(From Factory)

Oil Filter (From Factory)

Conventional Crankcase Lubricant

(Alternative Option)

Kohler Command Pro ® CH680, V-Twin, 2-Cyl. Gasoline (Air-Cooled)

41.1 (674)

22.5 (16.7) @ 3600 RPM

3600

36.8 (49.9)

1200

Champion ® RC12YC

.030 (0.76)

2.0 (1.9)

300 Hour, Kohler PRO ® Synthetic 10W-50 Kohler P/N 25 357 72-S

300 Hour, Kohler PRO ® Filter P/N 25 050 53-S

100 Hour, API SJ or Higher Grade Oil Only with 10W-30 Viscosity

Above 0° F (-18° C), or 5W-20 or 5W-30 Viscosity Below 32° F (0° C)

Oil Filter (Alternative Option)

Fuel Tank Capacity gal (L)

Fuel

Cooling System

Air Cleaner

200 Hour, Kohler Filter P/N 12-050-01-S

4.7 (17.8)

Automotive Grade Unleaded Gasoline

(87 Octane Minimum, 10% Ethanol Maximum)

Air-Cooled

Remote mounted Donaldson Radialseal ™ (5”),

Walker P/N 5090-8 Primary/5090-7 Safety Filter

ELECTRICAL SYSTEM

Battery

Charging System

Charging Output

System Polarity

Ignition

Starter

Interlock Switches

Circuit Breaker(s)

12 Volt, 300 CCA (Interstate SP-35)

Flywheel Alternator

20 Amp DC (Regulated)

Negative Ground

Electronic Capacitive Discharge

12 Volt Electric, Key Operated, Solenoid Shift

Ignition Lockout by Seat Switch, Transmission Neutral,

Blade Clutch, and Parking Brake

Two Fuses (5A)

Auto Reset (30A)

TRANSAXLE

Manufacturer/Model

Steering

Forward Speed Control

Dual, Independent Hydro-Gear ® ZT3100 Integrated Transaxles

Hand Lever Control / Individual Wheel

Precision Friction Lock Lever, Cruise Control, with

Neutral-Park Position

3

Specifications

TRANSAXLE (CONTINUED)

Service Brake

Parking Brake

Neutral

Final Drive

Transmission Release by Manual Dump Valve

Transaxle Direct to Drive Wheel

Transmission Fluid

Factory Service 20W-50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil)

Transmission Oil Capacity fl oz (L) 77 (2.3)

Transmission Cooling

Oil Filter

Ground Travel Speed

Forward MPH (km/h)

Reverse MPH (km/h)

Dynamic Braking through Transaxles

Internal Mechanical Cog Lock for each Transaxle

(Single Lever Control)

Cooling Fan Mounted on Drive Pulley

Hydro-Gear ® P/N 52114 (Walker P/N 2026-6)

0-8 (0-13) Infinitely Variable

0-5 (0-8) Infinitely Variable

BLADE DRIVE

PTO Shaft

Blade Drive Clutch and Brake

Quick Disconnect Sliding Spline Shaft with Two (2) High-Speed

U-Joints

Ogura Electric Clutch with Soft Start Engagement and Mechanical

Brake [Stops Blades within Five (5) Seconds of Disengagement]

TIRE SIZE

Deck Caster Wheel

Drive

Tailwheel

8 x 3.00-4 Semi-Pneumatic (Standard)

8 x 3.00-4 Pneumatic 4-Ply (Optional)

11 x 4.00-5 (Pneumatic 4-Ply, DS52, DS62, DS74 Only)

18 x 8.50-10 (Pneumatic 4-Ply Low-Profile)

11 x 4.00-5 (Pneumatic 6-Ply)

TIRE PRESSURE PSI (KPA)

Deck Caster Wheel*

Drive

Tailwheel

20 (137)

15 (103)

20 (137)

* If equipped with optional pneumatic tires

MOWER DECK

Recommended Cut Width

Side Discharge

Mulch

Cutting Height

Deck Suspension

36 to 74 in. (91 to 188 cm)

36 to 52 in. (91 to 132 cm)

1.5 to 4 in. (4 to 10 cm) or

1.5 to 4.5 in. (4 to 11.5 cm) (DS52 & DS62 Belt-Driven Decks Only)

Independent Torsion-Flex Frame with Caster Wheels and

Counterweight Springs

B23

4

B23 Specifications

TOWING

Towing Capacity lb (kg)

DRIVE BELTS

Engine/PTO Drive

Ground Drive

250 (113) if equipped with a factory installed or factory authorized tow hitch

DIMENSIONS (TRACTOR AND MOWER)

Length in. (cm)

Tractor Only 63 (160)

Tractor Wheel Base 40 (102)

72 (183) Tractor with Tilted Deck

(Approximate)

Tractor with 48" Mulch Deck

(DM48-2)

Width in. (cm)

Tractor Only (Outside Tire)

Tractor with 48" Mulch Deck

(DM48-2)

Height in. (cm)

Tractor

90.75 (230)

38.5 (98)

49 (125)

39.5 (100)

Weight lb (kg)

Tractor Only

Tractor with 52" Mulch Deck

(DM52)

610 (277)

848 (385)

Walker P/N 4230-3

Walker P/N 4230-2

SEAT Built-up Seat with Steel Frame, Extra Thick Foam Cushions and

Bolsters, and Removable/Replaceable Nylon Backed Vinyl Covers

FRAME/BODY CONSTRUCTION

Frame

Body

Deck

All Welded Unitized Steel Chassis

14 Gauge Steel

11 Gauge Steel

NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation. The specifications listed are for a standard configuration tractor, and may change with the addition of optional equipment.

5

Component Identification

COMPONENT IDENTIFICATION

NOTE: Operator Controls are identified in the section Operating Controls on page 26 .

B23

6

Seat Panel

Latch

Forward Speed

Control (FSC)

Friction

Adjustment

Deck Support

Arm (Not Visible)

Deck Lift Handle

(Cutting Height Adjustment)

Footrests

Tilt-Up Latch

Counterweight Springs and

Protective Covers

Deck Support

Arm

Deck Support

Pins and Height

Adjustment

Hitch Pins

Deck Tilt-Up

Bar

Deck

Caster Wheels

Front View and Right Side View

B23 Component Identification

Footrests

Fuel

Gauge

Fuel Pickup

Line

Rear Body (Shown) or Optional Dump Bed

Muffler

Heat Shield

Tailpipe

Muffler

Guard

Left Hand

Drive Wheel

Fuel Tank and Cap

Cylinder Head

Cooling Fins

Spread Axle

(Tail Wheel)

Tailwheel Fork and Wheel

Rear View and Left Side View

7

Component Identification

LH Transmission

Control Rod

Steering Lever

Spring / Dampeners RH Transmission

Control Rod

LH Transaxle

LH Transaxle

Lockout Arm

Parking Brake

Lever

Parking Brake

Linkage

Donaldson

Air Cleaner

Turbine Precleaner

Fuel Gauge

EVAP Line

Roll Over Valve

Fuel Filter

Fuel Pickup Line

30-Amp Master

Circuit Breaker

(Not Visible)

RH Transaxle

RH Transaxle

Lockout Arm

Electric PTO

Clutch

Air Filter

Restriction Gauge

Transaxle Oil

Expansion

Reservoir

Battery Box and Cover

Fuel Pump

(Low Pressure)

Oil Fill

Throttle and

Choke Linkage

B23

Dipstick

Muffler Heat

Shield

Top View (Engine Compartment)

8

B23

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. Failure to comply with safety instructions may result in personal injury.

The seriousness or degree of importance of each type of information is defined 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.

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

NOTE: Identifies information worthy of special attention.

Safety Instructions

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 instructions 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 familiar 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

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.

9

Safety Instructions

6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine 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 hearing protection is recommended.

Wear a suitable hearing protective device, such as earmuffs or earplugs.

8. Keep all protective shields and safety devices 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 switch is in the DISENGAGED position, and the Parking Brake is in the ENGAGED posi tion. 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 NEU-

TRAL-PARK, (2) PTO Clutch ENGAGED, or

(3) Parking Brake DISENGAGED.

NOTE: There is a 1/2 second time delay function on the seat switch to avoid engine power interruption when driving over bumps.

10. Handle gasoline with care.

Gasoline is highly flammable 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 flames, or sparks away from the fuel tank and fuel container.

d. Always fill 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 container cap securely and clean up any spilled fuel before starting the engine.

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

B23

10

B23

OPERATING

1. Operate the mower only in daylight or in good artificial light with good visibility of the area 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 mower blades are operating. Never operate the tractor without a deck or imple ment 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 configuration, the back of the tractor swings to the outside during turns.

DANGER

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

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. If the transmission drive belt breaks 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 posi tion. 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 this machine.

6. Disengage the blade clutch, put the FSC in the

NEUTRAL-PARK position, and engage the

Parking Brake before starting the engine (an ignition interlock switch normally prevents starting of the machine if these controls are in the OPERATING position).

Safety Instructions

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 confined 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 backing the machine up, look to the rear to be sure no one is behind the machine. Watch carefully for traffic when crossing or working near roadways.

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.

Never raise the mower deck while blades are rotating.

DANGER

Do not mow or drive the tractor within

5 feet (1.5 meters) of an embankment or retaining wall with drop off.

11

Safety Instructions

12

14. The maximum recommended slope operating angle is 15 degrees or 27% 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), engage parking brake, stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat.

NOTE: The blade/PTO brake should normally stop drive line rotation within five (5) seconds of disengaging the PTO clutch.

16. For side discharge mower decks, do not operate with the grass deflector shield re moved.

Keep the deflector in the lowest possible position.

17. When using the tilt-up deck, observe the following: a. Do not move tractor with deck in tilt-up position.

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

18. In case of a clogged or plugged mower deck: 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 movement has stopped before trying to unclog the system.

c. Disconnect the spark plug wires.

d. Never place hands under the deck - use a stick or similar tool to remove clogged material.

19. If the cutting blades strike a solid object or the machine begins to vibrate abnormally, immediately disengage the blade clutch (PTO), engage the parking brake, stop the engine, and wait for all moving parts to stop.

To

B23 prevent accidental starting, disconnect 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.

20. Do not touch the engine or muffler while the engine is running or immediately after stop ping the engine. These areas may be hot enough to cause serious burns.

21. When leaving the machine unattended, disengage the blade clutch (PTO), engage the parking brake, stop the engine, and remove the key.

22. When equipped with a factory installed hitch or factory authorized hitch kit, do not exceed recommended tow capacities.

Do not tow with the PTO clutch or mower blades engaged, and do not allow people to ride in or on towed trailers.

23. Use caution when towing on slopes, rough terrain or when conditions limit traction. Do not tow on slopes greater than 5 degrees

(9%).

B23

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 spark plug wires.

2. To reduce fire 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, mak ing sure they are tight.

4. Perform only maintenance instructions described in this manual.

Unauthorized maintenance operations or machine modifications 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.

Unauthorized maintenance operations or modifications to the engine may result in unsafe operating conditions.

7. Altering the equipment or engine in any manner which adversely affects its operation, perfor mance, durability, or use will VOID the warranty and may cause hazardous conditions.

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.

Sub stitute parts may result in product malfunction and possible injury to the operator and/or others.

Safety Instructions

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.

c. Keep sparks, flames, and smoking materials away from the battery at all times. To avoid sparks, use care when removing bat tery cables from posts.

d. Disconnect both battery cables before unplugging any wiring connectors or making repairs on the electrical system.

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

13

Safety Instructions B23

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.

9.

1.

2.

3.

4.

5.

6.

7.

8.

Location: LH Fender

Part Number: 8600-65

1. Warning – read Operator’s Manual before operating the machine.

2. Warning – wear eye and ear protection when operating the machine.

3. Warning - crushing/dismemberment hazard of bystanders.

● Do not carry passengers.

● Always stop the machine if someone enters the area.

4. Warning – thrown object hazard.

● Keep bystanders away from the machine when operating.

5. Warning - always be aware of what is behind the machine before backing up.

● Do not mow in reverse unless absolutely necessary.

● Always look down and behind when backing up.

6. Warning – entanglement hazard.

● Keep all guards in place while engine is running.

7. Warning – do not engage PTO clutch with PTO shaft disconnected.

8. Choke

9. Parking Brake

● Move lever forward to engage brake.

● Move lever back to disengage brake.

14

B23 Safety Instructions

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.

1.

2.

3.

Location: RH Fender

Part Number: 8600-48

1. Forward Speed Control

● Move lever forward to increase speed.

● Move lever back to stop.

2. Warning – read Operator’s Manual before servicing or performing maintenance.

● Engage parking brake.

● Remove ignition key.

3. Warning – do not operate the machine without a deck or other implement attached.

4. Throttle

● Move lever forward to increase engine speed.

● Move lever back to idle.

5. Warning – roll-over hazard.

● Do not mow or drive the tractor within 5 feet of an embankment with a drop off.

● Do not operate on slopes greater than 15 degrees.

● Do not mow within 5 feet of a body of water.

4.

5.

Location: Engine

Part Number: 6895-103

Change engine oil and oil filter every 300 hours.

15

Safety Instructions

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.

B23

1.

16

2.

8600-28

Location: Each End of Mower Deck

Part Number: 8600-28

1. Warning – thrown object hazard.

● Keep bystanders away from the machine when operating.

● Clear lawn of debris before operating.

● Keep any discharge deflector in place and in the lowest position.

2. Warning – rotating mower blades are a cutting/ dismemberment hazard to hands and feet.

● Keep all body parts away from rotating mower blades.

● Do not step on end of deck.

8600-2

Location: Air Cleaner Mount

Part Number: 8600-2

Warning – entanglement and cutting and/or dismemberment hazards.

● Keep away from rotating shafts, belts, and other components.

Location: Deck Carrier Frame

Part Number: 8600-15

Warning – lock deck tilt-up hinge before operating the machine.

8600-14

Location: Deck Carrier Frame

Part Number: 8600-14

Warning – do not operate the machine with the deck tilted up.

Location: Chassis Member Behind Transaxles

Part Number: 9804-1

Neutral Lock

● Lift and move into slot to unlock transmission and allow machine to freewheel.

Location: Deck Discharge Shield

(SD Decks Only)

Part Number: 5848-3

Warning – thrown object hazard.

● Always keep the discharge shield in the lowest position when operating.

● Do not remove the discharge shield

B23 Safety Instructions

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.

Location: Deck Gearbox Cover

Part Number: 8600-39

Warning - stop engine and remove ignition key before adjusting deck cutting height.

60 lb·ft (81 N·m)

Location: Gearbox Cover

(Gear-Driven Decks Only)

Part Number: 8600-9

Tighten blade nuts on gear-driven decks to

60 lb·ft (81 N·m).

8600-9

1.

Location: Underside of Front Body

Part Number: 4107-13

1. Ground drive belt routing.

2. Engine/PTO belt routing.

2.

8600-5

Location: Rear Body Near Muffler

Part Number: 8600-5

Warning – hot surface, do not touch.

8600-12

Location: Underside of Rear Body, Behind Seat

Part Number: 8600-12

Warning – carbon monoxide (CO) poisoning hazard.

● CO emitted by a running engine can be deadly.

● Do not operate indoors or in other enclosed areas.

Location: Engine Shroud

Part Number: 5855

17

Assembly Instructions

Assembly Instructions

WARNING

It is critical to follow the steps provided for setup and assembly of the tractor and deck to ensure the safety of the operator and the equipment.

SETUP INSTRUCTIONS

Walker Mowers are shipped partially assembled to our distribution network, and are typically assembled by the selling dealer. For any additional assembly besides the following, contact your Walker dealer.

Tire Installation (Tractor)

● Install the drive tires using the eight (8) mounting nuts supplied with the Owner’s Packet of materials. Nuts are torqued to 75 to 85 lb·ft

(102 to 115 N·m).

● Check and adjust the inflation of the tires. The tire inflation recommendations are:

Drive = 15 PSI (103 kPa)

Tailwheel = 20 PSI (137 kPa)

Battery Service

The battery comes sealed and is maintenance free, so the electrolyte level will not need to be checked or filled.

18

Battery Box and Cover

Battery Location

IMPORTANT: Make sure battery is securely mounted in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe damage to the machine. A hazard may be

B23 created by damage to critical working parts and safety systems

CAUTION

Important Battery Service, Installation, and

Charging Tips:

● Do not allow the battery cables to touch opposing terminals. When connecting battery cables attach the positive (+) cable to positive (+) battery terminal first, followed by negative (-) cable to negative (-) battery terminal.

● Never start the engine when the cables are loose or poorly connected to the battery terminals.

● Never disconnect battery while engine is running.

● Never use a quick battery charger to start the engine.

Battery Charging

DANGER

BATTERIES PRODUCE EXPLOSIVE GASES

● Charge the battery in a well-ventilated area, so that gases produced while charg ing can dissipate.

● Keep sparks, flames, and smoking ma terials away from the battery at all times.

● Make sure the battery charger is unplugged before connecting or disconnecting cables to the battery.

1. Disconnect the battery terminals–negative (-) first.

2. Charge the battery at 15 amps for 10 minutes.

DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

3. Reconnect the battery terminals starting with the positive (+) terminal.

B23

Battery Installation

Install the battery in the mower as shown in Battery Installation photo. Connect the positive (+) first and then the negative (-) cable to the proper battery terminal [red cable and boot connects to the Positive (+) terminal] . Slide the rubber boot up and over the battery post, making sure it covers the post completely to prevent an electrical short . Install battery cover using two (2) 10-24 threaded knobs.

(+) Battery

Terminal

Battery Clamp Secured by Wing Nut(s)

Battery Installation

Two (2) 10-24 Threaded

Knobs Mount Cover

Assembly Instructions

Mower Deck Assembly

Deck Caster Wheels Installation

CAUTION

The engine must be off during the tractor assembly and deck installation.

1. Remove the bolt and nut from each deck caster wheel fork.

2. Fit a bearing cup on the outside of each wheel bearing and slide the wheel assembly into the wheel fork.

3. Insert the 3/8-16 x 4-1/2 in. bolt through the wheel fork with the bolt head to the outside and install the 3/8-16 Keps nut.

4. Tighten the bolt and nut until the axle spacer tube and inner bearing race bottom against the inside of the wheel fork (will not turn) while the wheel spins freely without binding.

Axle Spacer

Tube

Battery Cover

Battery Cover Installation

Bearing

Cup

Axle Bolt

Deck Caster Wheel Installation

5. Grease the caster wheel bearings and caster pivot bearings - two (2) grease fittings for each wheel.

19

Assembly Instructions

Deck Discharge Deflector Shield Installation

(Side Discharge Models Only)

Attach the side discharge deflector shield using two (2) 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and 3/8 in. wave spring washers. The wave washers fit between the two hinging surfaces. Tighten the nuts until the shield moves freely but is not loose.

WARNING

DO NOT operate the machine without the grass deflector shield attached and in the lowest possible position.

Attach Shield

PTO Shaft Guard Installation

Position the shaft guard as shown and mount with two (2) 1/4-20 x 1/2 in. bolts.

Carrier Frame

Tube Sockets

B23

Attach

Guard

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

Mount the two (2) tilt-up roller wheels on the brackets on the rear skirt of the deck housing using the

P/N 8490 axle bolt, 3/8 in. wave spring washer and

3/8-16 in. Whiz locknut. Tighten the axle bolt until the wheel rolls freely, but is not loose.

Deck Discharge Shield Installation

Roller

Wheels

Roller Wheel Installation

20

B23

Mower Deck Installation on Tractor

Deck Installation

1. Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation photo for location of deck support arm.

Deck Support

Arms

Assembly Instructions

4. Reaching under the tractor, slide the PTO coupler tube onto the deck drive shaft (align arrow decals), then install the coupler quick disconnect onto the tractor PTO drive shaft.

IMPORTANT: When installing the DS52 or

DS62 Mower deck, make sure to retract the dolly wheel after mounting the deck on the tractor.

Arrows on Shaft and Tube

(Used to Align When Sliding Together)

Grease Deck

Support Arm(s)

Mower Deck Installation

2. Engage the deck carrier frame tube sockets on the tractor support arms. (Refer to PTO

Shaft Guard Installation photo for socket location.) Slide the deck onto the support arms approximately 3 in. (76 mm).

3. Retract the spring-loaded quick disconnect ring on the PTO Coupler and insert the Coupler Installation Tool (provided in Owner’s

Packet) as shown in the PTO Coupler Installation Tool photo.

NOTE: The Coupler Installation Tool is provided for convenience, but is not required for installation.

Coupler

Installation Tool

PTO

Connection

PTO Shaft Connection

5. Remove Coupler Installation Tool from the quick disconnect ring and make sure the ring has “snapped” securely on the spline shaft.

IMPORTANT: DO NOT operate tractor with

Coupler Installation Tool installed.

IMPORTANT: To prevent damage to the mower, make sure the PTO quick disconnect is securely locked on the tractor, with the locking balls fully seated in the groove and the ring in the locked position (refer to the Quick

Disconnect Ring “Locked” Position illustration). After installation, pull on the PTO coupler to check for security.

PTO Coupler

Tube Retract Spring-Loaded

Quick Disconnect Ring

PTO Coupler Installation Tool

21

Assembly Instructions

Coupler Ring in

Released Position

PTO Drive

Shaft

PTO Coupler

U-Joint

Quick Disconnect Ring “Released” Position

Internal Balls

Locked on Shaft

PTO Drive

Shaft

B23

9. With the counterweight springs connected, the weight on the deck caster wheels should be

15 to 25 Ib (6.8 to 11.3 kg); this adjustment is preset at the factory. If required, the spring tension can be adjusted by tightening or loosening the elastic stop nuts located underneath the lower spring hook, or contact your local dealer if additional help is required. Refer to

Deck Counterweight Spring Installation photo.

Spring Tension Adjustment Nut

Located Under Lower

Spring Hook (Not Visible)

22

PTO Coupler

U-Joint

Coupler Ring in

Locked Position

Quick Disconnect Ring “Locked” Position

6. Slide the deck the rest of the way on the deck arms.

7. Install the hitch pin through the hole on the end of each support arm to lock the deck in place (refer to Deck Counterweight Spring

Installation photo). Two (2) hitch pins are included in the Owner’s Packet of materials.

WARNING

Failure to install the hitch pins will result in the deck disconnecting from the tractor during operation.

8. Raise the seat panel to the open position.

Then raise the front of the deck, and clip the counterweight springs to the receptacle on front of body. Lower the deck and the seat panel to tension the springs. (Refer to Deck

Counterweight Spring Installation photo.)

Counterweight Springs

Clip Onto Body With

Seat Panel Tilted Up

Hitch Pins Lock Deck on Support Arms

Deck Counterweight Spring Installation

B23

Deck Leveling

The mower deck and support frame are jig welded; within normal tolerances, very little, if any, shimming should be required to level the deck. Tire pressure will influence the levelness of the deck.

Check the tire pressure of all pneumatic tires as a possible cause of the deck not being level.

1. Position mower on a smooth, level surface.

Set the cutting height to the highest position

– 4 in. (102 mm) – for easy access under the deck to measure blade height. Refer to Ad justing Cutting Height on page 35 .

NOTE: A block of wood cut 4 in. (102 mm) high is a convenient gauge to measure blade height above ground during the leveling process.

Assembly Instructions

WARNING

The machine must be shut off during this procedure.

2. Check the side-to-side level. Rotate each blade sideways and measure the distance from blade tip to ground on each side. If measurements vary more than 1/8 in. (3 mm), add a washer shim under the deck support pins on the low side to level the deck.

3. Check the front-to-rear level. Rotate the blades to point forward.

Measure the distance from blade tip to ground on the front and rear. The rear of the blade should be 1/8 to

1/4 in. (3 to 6 mm) higher than the front of the blade; shim the rear (or front) deck support pins equally to achieve at least 1/8 in. (3 mm) difference.

4 in. (102 mm)

Wood Block

Should be 1/8 in. (3 mm) to 1/4 in. (6 mm) higher at the rear of the blade

Should not vary more than 1/8 in. (3 mm) side-to-side

NOTE: For DS52 and DS62 decks with three (3) staggered blades, the front-to-rear level should be set using the middle blade pointing forward, and either outside blade pointing back.

Deck Leveling

4 in. (102 mm)

Wood Block

23

Assembly Instructions

24

PREOPERATING CHECKLIST

Before operating the mower for the first time, and as a routine before daily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked. (For a mower with frequent operation, some of these items will not need to be checked every day, but the operator should be aware of the condition of each.)

For proper fuel and lubrication, refer to Specifica tions on page 3 .

F

FILL FUEL TANK

Fill the fuel tank using clean, fresh automotive grade unleaded gasoline (87 octane minimum, 10% ethanol maximum).

DANGER

Handle gasoline with care. Gasoline is highly flammable and its vapors are explo sive. Use safe refueling procedures:

● DO NOT fill fuel tank with the engine running.

● If the engine is hot, allow to cool before refueling.

● Use an approved fuel container.

● Fuel the mower outdoors.

● DO NOT smoke while refueling.

● Avoid spilling fuel; use a funnel or spout.

● DO NOT overfill the fuel tank; fill up to about 1 in. (25 mm) below the top of tank.

IMPORTANT: DO NOT permit dirt or other foreign matter to enter the fuel tank. Wipe dirt from around the filler cap before removing.

Use a clean fuel storage container and funnel.

IMPORTANT: DO NOT mix oil with gasoline. Always use fresh, automotive grade unleaded gasoline. DO NOT use gasoline containing greater than 10% ethanol. DO

NOT use additives, such as carburetor cleaners, deicers, or moisture removing agents. DO

B23

NOT use gasoline blended with methyl alcohol.

F

CHECK ENGINE CRANKCASE OIL LEVEL

Check the engine crankcase oil level before use and after each 8 hours of continuous operation. Refer to Checking Engine Crankcase Oil Level on page 41 .

F

CHECK AND SERVICE ENGINE AIR CLEAN-

ER SYSTEM

● Check air filter restriction gauge to make sure the yellow indicator disk is in the safe operating (green) range.

● Check condition, cleanliness, and security of the complete air cleaner system (inspect air filter paper element every 100 hours ).

For detailed procedures, refer to Engine

Air Cleaner System on page 49 .

F CHECK ENGINE COOLING SYSTEM

Check that the engine cooling air intake screen is free of obstruction by grass clippings or debris and clean if required. Also, cylinder head cooling fins should be inspected and cleaned if any build-up of debris is noted

[remove two (2) cylinder head access panels to inspect and clean]. Refer to Cylinder Head

Cooling Fins on page 48 for this procedure.

Check performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder heads, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

F

CHECK SECURITY OF DRIVE TIRE MOUNT-

ING NUTS

The eight (8) Drive Tire mounting nuts should each be torqued to 75 to 85 lb·ft (102 to 115

N·m).

F

INSPECT TWO (2) DRIVE BELTS

Engine/PTO and Ground Drive.

B23

F CHECK HYDROSTATIC TRANSAXLE OIL

LEVEL

Refer to Check Transaxle Fluid Level on page

44 for details.

F CHECK FUNCTION OF SAFETY INTERLOCK

SWITCHES

Refer to Safety Switch System on page 56 to check for proper operation of safety switches, both during engine starting and with the operator leaving the seat with tractor moving forward or with the mower blades engaged.

F CHECK TIRE PRESSURE

Deck Caster Wheel* = 20 PSI (137 kPa)

Drive

Tailwheel

= 15 PSI (103 kPa)

= 20 PSI (137 kPa)

* If equipped with optional pneumatic tires

F

CHECK DECK IS SECURELY ATTACHED

Check for correct deck attachment (hitch pins and counterweight springs).

F

ADJUST MOWER CUTTING HEIGHT, IF

REQUIRED

Position the hitch pins in the four deck support pins. Refer to the Cutting Height Adjustment decal on the deck gearbox cover.

F CHECK AND CLEAN GRASS BUILDUP

UNDERNEATH MOWER DECK

Refer to cleaning Grass Buildup in Mower

Deck Housing on page 51 for deck tilt-up and deck cleaning information.

DANGER

Never operate cutter blades with deck in raised position because it is hazardous.

The tilt-up deck can be secured in the raised position by unlocking the deck lock levers on each side of the carrier frame and inserting the deck hook into the tilt-up latch on the tractor body. Before operating the tractor, make sure to re-engage the deck lock levers after lowering the deck to the normal operating position.

Tilt Bar

Tilt-Up Hook and

Latch Connected

Assembly Instructions

Tilt-Up

Latch

Deck Lock

Lever

Tilt-Up

Hook

Deck Secured in TILT-UP Position

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

F

CHECK MOWER BLADE CONDITION,

SHARPNESS, AND SECURITY OF MOUNT-

ING

The blade mounting nuts on gear-driven decks should be torqued to 60 lb·ft (81 N·m), and the blade mounting bolts on belt-driven decks torqued to 70 lb·ft (95 N·m). If blade sharpening is required, refer to Sharpen Mower Blades on page 54 .

F

PERFORM ANY ADDITIONAL NECESSARY

MAINTENANCE PROCEDURES

Refer to the chart listing all the maintenance tasks and recommended intervals at the beginning of the Maintenance Instructions on page 39 .

25

Operating Instructions

Operating Instructions

OPERATING CONTROLS

CAUTION

Before operating the mower, become familiar with the location and function of all operator controls. Knowing the location, function, and operation of these controls is important for safe and efficient operation of the mower.

Ignition Switch

The ignition switch is located on the right front of the body and is used to start and stop the engine.

The switch has three positions:

● “O” is the OFF position

● “I” is the ON (RUN) position

● is the START position

B23

Ignition Switch

When starting the engine, turn the key clockwise to the START position. Do not hold the key in this position longer than 10 seconds. If the engine does not start, return the key to the OFF position for at least 60 seconds before making a restart attempt.

IMPORTANT: Prolonged cranking can damage the starter motor and shorten battery life.

Release the key when the engine starts, and it will return to the ON (RUN) position. To stop the engine, rotate the key counterclockwise to the OFF position.

Choke

Rear Body

Forward Speed

Control (FSC)

Throttle

Parking

Brake

Parking Brake

26

Seat Panel Latch

Ignition

Switch

Blade Clutch

Switch (PTO)

Operating Controls

Steering

Levers

Hourmeter

B23

Engine Choke

The choke control lever (black knob) is located on the left side of the seat. To start a cold engine, move the choke control forward to the ON position.

After engine starts, move the choke control toward the OFF position, keeping enough choke to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position. A warm engine requires little or no choke for starting.

IMPORTANT: Make sure the choke is in the OFF position during normal engine operation; running with the choke in the ON position CAN damage the engine.

Engine Throttle

The throttle control lever (red knob) is located on the right side of the seat and is used to control engine speed. Moving the lever forward toward the FAST position increases engine speed; moving it backward toward the IDLE position decreases engine speed.

Throttle

Operating Instructions allows the tractor to resume forward travel at the speed set by the FSC lever. To stop and park the machine, the FSC lever is moved backward to the

NEUTRAL-PARK position.

Steering Levers

Each drive wheel is controlled by its own independent steering lever, for both steering function and

FORWARD/REVERSE motion. The FSC lever sets the maximum forward speed, and also sets the forward position of the steering levers. The steering levers operate only with a backward pulling movement of the lever, which causes the drive wheel for that lever to first slow down, stop, and then reverse with a full backward lever stroke.

The levers are released to the FORWARD position for “straight-ahead” ground travel.

NOTE: Pushing forward on the steering levers will not cause any change in tractor motion - there will be no steering lever reaction and there will be no machine damage.

Parking Brake

The parking brake functions by locking a detent arm to a cog in the hydraulic motor rotor. Moving the lever FORWARD engages the parking brake; moving the lever BACKWARD releases the brake.

IMPORTANT: Stop the tractor completely before engaging the parking brake. The parking brake uses a positive mechanical lock similar to the

PARK position on an automotive automatic transmission. If the tractor is moving when the brake is engaged, it will result in sudden stoppage and possible internal damage to the transaxle.

NOTE: If pressure on the parking brake (e.g., parked on a hill) makes it impossible to release the parking brake with the parking brake lever, move the mower gently forward or backward to allow the brake detent to release.

Throttle Location

Forward Speed Control (FSC)

Forward Speed Control (FSC) has two functions:

One is to set forward travel speed, and the other is to establish the NEUTRAL-PARK position. When the FSC lever is moved into the FORWARD posi tion, a friction lock holds any forward speed setting from 0 to 8 mph (0 to 13 km/h). The ground speed is proportional to the lever position; the further the lever is advanced forward, the faster the tractor moves. It is not necessary to hold the FSC in position since the friction lock maintains the selected lever position. Pulling back on the steering levers overrides the FSC setting and slows or stops forward travel. Releasing the steering levers

27

Operating Instructions B23

Transaxle Lockout Arms

The transaxle lockout arms disengage the transaxles. By lifting the arms up and locking them into place with the shoulder on the arm in the chassis notch, the transaxles are released to permit freewheeling. By releasing the arms and recessing them back toward the chassis, the transaxles are engaged for normal operation. The transaxle arms in the LOCKOUT position are used to enable moving the machine without the engine running

(e.g., for service). Refer to Transaxle Lockout on page 35 for operating instructions.

Engaged

Position

Parking Brake Engaged

28

Disengaged

Position

Parking Brake Disengaged

Blade Clutch Switch (PTO)

The blade clutch switch (red button) is located beside the steering levers. It is used to engage and disengage the mower blades. The blade clutch switch has two positions. Pull out the switch to engage the PTO that drives the blades, and push down the switch to disengage the PTO and engage the blade brake.

Transaxle

Lockout Arms

Transaxle Lockout Arm Location

NOTE: The transaxle lockout arms ends should be completely retracted against the chassis, otherwise operation of the transaxle may be erratic.

Circuit Breaker and Fuses

Two (2) 5 amp fuses are located underneath the seat panel adjacent to ignition switch, and they protect the safety circuits and relays. An autoreset 30 amp master circuit breaker is located in the rear left of the chassis and protects the changing system. Refer to the Kohler engine manual included with the Owner’s Packet of materials for information regarding these fuses.

Pull Out to

Engage

Blade Clutch Engaged

B23

Seat Panel Latch

The seat panel hinges forward for maintenance access and is latched down in the OPERATING position. To raise the seat, pull outward on latch and lift the seat.

Seat Panel

Latch

Seat Panel Latch

Rear Body

The rear body or optional dump bed is hinged and tilts back for maintenance access.

Operating Instructions

Procedure

Oil Change

(Break-In)**

Lubricate and Check

Levels

Interval*

4-6 Hours

24-26 Hours

Reminder

C

H

G

OIL

LUBE

Oil Change 49-51 Hours***

C

H

G

OIL

* These intervals reflect the actual time that the reminder will flash (one hour prior to and one hour after the recommended interval).

** This reminder is only used one time.

*** In normal operating conditions, oil changes in

100-hour intervals are acceptable. Walker and the engine manufacturers recommend engine oil changes every 50 hours in extremely dirty or dusty conditions or for units with less than

100 hours annual use.

NOTE: The hourmeter reminders are set for the most frequent service intervals. Follow the intervals outlined in the MAINTENANCE SCHEDULE

CHART.

NOTE: The blinking hour glass on the display means that the meter is operating properly.

Lifting Rear Body

Hourmeter

The hourmeter, which is located on the right front of the body, displays operating time accumulated when the PTO (blade drive) is engaged .

The hourmeter provides maintenance reminders after certain hours of operation. The hourmeter screen will start flashing the reminder one hour prior to the recommended interval and will continue until one hour after the recommended interval (two hours). The hourmeter does not have a manual reset function .

Hourmeter

29

Operating Instructions B23

The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers

LEFT WHEEL

STEERING LEVER

RIGHT WHEEL

STEERING LEVER

FORWARD SPEED

CONTROL LEVER (FSC)

BLADE CLUTCH (PTO)

Forward Position

(No Control Change)

Neutral-Park

Position

Reverse Drive

Wheel Motion

Position

Full Forward

Position

Intermediate

Ground Speed

Position

Neutral-Park

Position

Ground Speed

30

CHOKE

ON

Position

OFF

Position

Engaged

Position

8600-5

PARKING BRAKE

Disengaged

Position

Operating Controls (Top View from Drivers Point of View)

THROTTLE

Fast

Throttle

Position

Idle

Position

B23

STARTING THE ENGINE

CAUTION

Before operating the mower, read and understand all Safety Instructions and Operating Instructions.

WARNING

NEVER run the engine in an enclosed or poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

1. Before attempting to start the engine, make sure the operator is in the seat, the Forward

Speed Control is in NEUTRAL-PARK position, the parking brake is ENGAGED, and the blade clutch is DISENGAGED.

CAUTION

A safety interlock switch system PRE-

VENTS CRANKING the engine with any one of these three controls in the OPERAT-

ING position: (1) Forward Speed Control out of neutral, (2) blade clutch (PTO) engaged, or (3) parking brake disengaged. If the engine cranks otherwise, the safety system is not working and should be repaired or ad justed before operating the mower. DO NOT disconnect safety switches; they are for the operator’s protection.

2. Move the choke lever to the ON position and move the throttle 1/4 to 1/2 open (toward

FAST ). Turn the ignition switch to the START position to start the engine. Release the key to ON (RUN) position as soon as the engine starts.

NOTE: The choke may not be required if the engine is warm.

IMPORTANT: If the engine fails to start after approximately 10 seconds of cranking, the engine should be checked before further crank ing. Turn the key to the OFF position and allow a 60 second cool-down period between starting attempts. Failure to follow

Operating Instructions these guidelines can damage the starter motor and shorten battery life. Consult your Walker dealer or authorized Kohler dealer for additional help.

3. Gradually move the choke to the OFF position, keeping enough choke on to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position.

IMPORTANT: Make sure the choke is in the

OFF position during normal engine operation; running with the choke in the ON position

CAN damage the engine.

IMPORTANT: If the DS52 or DS62 mower deck is in stalled on the tractor, make sure the dolly wheel is retracted BEFORE moving.

CAUTION

Learn to START, STOP, and MANEUVER the mower in a large, open area.

If the operator has not operated a ma chine with LEVER STEERING OR DUAL HYDROing and ground operation should be learned and practiced until the operator is completely chine BE-

FORE ATTEMPTING TO MOW.

DANGER

Keep feet on footrests at all times when the machine is moving. Never operate the tractor without a deck or implement installed.

1. Move the FSC out of NEUTRAL-PARK posi tion to the desired forward speed. DO NOT hold for ward on steering levers. It is not necessary to hold the FSC lever in position since a friction lock maintains the selected lever position (and forward travel speed).

2. Steer by pulling the lever on the side of desired direction of turn, e.g., pull the LH lever to turn left . To minimize the possibility of overcontrol, use only one hand on both steering levers.

31

Operating Instructions

CAUTION

An operator presence switch (seat switch) will cause the engine to stop if the parking brake is in the DISENGAGED position and/ or the FSC is out of the NEUTRAL-PARK position (tractor stationary or moving forward) and the operator is not in the seat.

The function of this switch should be checked by the op erator raising off the seat, first with the parking brake DISEN -

GAGED, and then with the tractor moving forward (allow 1/2 second “off the seat” for the time delay function); the engine should stop. In each case, if the safety sys tem is not working, it should be repaired or replaced before operating the mower. DO

NOT disconnect the safety switches; they are for the operator’s protection.

NOTE: If the FSC lever will not stay in the selected position, the friction lock needs to be adjusted. Refer to Adjustments for Transmis sion Control Step 6 - Forward Speed Control

Friction Adjustment on page 64 .

Pull Steering

Levers With

Left Hand

Forward Speed Control

(FSC)

Keep Feet On Footrest

When Moving

Correct Operator Hand Position on the Controls

3. Reverse direction of the mower by pulling both levers backward.

NOTE: Smooth action on the steering levers will produce smooth mower operation.

B23

Remem ber to keep the engine and ground speed slow until learning the control response.

WARNING

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 NEU-

TRAL-PARK position.

4. The FSC may be adjusted forward for faster ground speed and backward for slower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e., as the engine pulls down in heavy cutting, pull back on the FSC lever to reduce ground speed. Adjusting ground speed helps maintain a balance between engine power and blade speed for high-quality cutting action.

5. Stop ground travel by pulling both steering le vers backward to the NEUTRAL position

(trac tor not moving) and then moving the FSC lever to the NEUTRAL-PARK position.

NOTE: If the tractor creeps forward or back ward with the FSC lever in the NEUTRAL-

PARK position, the transmission control needs to be adjusted. For details refer to Adjust ments for Transmission Control Step 3 - Neu tral Function Adjustment on page 63 .

WARNING

If the transmission drive belt breaks 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 position. When the machine is stopped or moving slowly, engage the parking brake.

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

32

B23

GETTING STARTED RECOMMENDATIONS:

♦ Learn operation of the mower in an open area away from buildings, fences, and ob structions. Learn operation on flat ground BEFORE operating on slopes.

♦ Start maneuvering the mower with

SLOW engine speed and SLOW Forward Speed Control setting until familiar with all operat ing characteristics.

♦ Remember it is not necessary to hold the steering levers forward (a unique

Walker feature); always PULL on the levers for steering or for reverse motion of the mower.

♦ Learn to operate the mower with your left hand on the steering levers and right hand on Forward Speed Control.

The use of two hands on the steering levers tends to cause overcontrol.

♦ Learn to operate the steering levers with smooth action. Jerky movements are hard on the transmission and lawn. For sharp turns, do not allow the inside wheel to stop and twist on the grass. Pull the steering le ver controlling the inside wheel into reverse for a smooth “rolling” turn (one wheel roll ing forward while the other rolls backward).

♦ Practice maneuvering the mower until you can make it go exactly where you are aiming.

♦ Remember, for an emergency stop, or in case of loss of control, machine movement can always be stopped quickly by pulling the Forward Speed

Control into the NEU TRAL-PARK position.

Operating Instructions

ENGAGING THE BLADE DRIVE

1. Set the engine throttle at about 1/3 speed. Do not attempt to engage the blade clutch at high engine speeds.

Use only moderate engine speed when engaging the blade clutch.

2. Engage the blade clutch by pulling out on the blade clutch switch .

3. To disengaged the blade clutch, reduce the throttle to half speed or less and push in the blade clutch switch.

Engaged

Position

Blade Clutch Engaged

Disengaged

Position

Blade Clutch Disengaged

NOTE: The electronic Soft Start function of blade clutch engagement normally protects the blade drive from sudden engagement and shock loads, but it is still a good operating practice to avoid engaging the blades at high engine speeds.

33

Operating Instructions B23

CAUTION

An operator presence switch (seat switch) will cause the engine to stop if the blade clutch is engaged and the operator is not in the seat. The function of this switch should be checked by the operator raising off the seat and engaging the blade clutch; the engine should stop. If the switch is not working, it should be repaired or replaced before operating the mower. DO NOT disconnect the safety switches; they are for the operator’s protection.

IMPORTANT: DO NOT engage the blade clutch when transporting the mower across drives, sidewalks, loose materials, etc. DO NOT engage the blade clutch with the PTO shaft disconnected

(the mower deck removed from tractor).

CAUTION

If the cutting blades strike a stationary object while mowing, stop the mower immediately, disconnect the spark plug wires, lift the deck, and inspect the deck and blades thoroughly for damage. Make sure that the blade timing has not been dis turbed (the blades should be at 90 degrees to each other). Refer to Blade Overload Shear

Bolts on page 60 if blades are out of time.

Also, make sure the blade retain ing nuts are torqued to 60 lb·ft (81 N·m).

STOPPING THE MACHINE

1. Pull the steering levers to the NEUTRAL posi tion and then move the FSC lever backward to the NEUTRAL-PARK position.

2. Slow the engine to a fast idle; put the throttle in the 1/2 throttle position.

3. Disengage the blade clutch.

IMPORTANT: DO NOT disengage the blade clutch with high engine speed (above 1/2 throt tle) since excessive brake action on the blade drive will cause premature wear of the brake.

WARNING

A brake stops the cutter blades from freewheeling within five (5) seconds after dis engaging the clutch. If the brake sys tem malfunctions and the blades do not stop within five (5) seconds, the brake should be repaired or replaced before further operation. Contact your Walker dealer for service.

4. Slow the engine to idle, put throttle in IDLE position; turn the ignition switch OFF.

WARNING

Remove the key from the ignition switch when leaving the mower unattended. This will prevent children and inexperienced operators from starting the engine.

5. Engage the parking brake by moving the lever forward.

IMPORTANT: The hydrostatic transmissions lock to prevent the mower from rolling freely with the engine stopped. However, if the mower is parked on a slope, it is necessary to

ENGAGE the parking BRAKE to prevent the mower from creeping. This is due to a small amount of slip page in the hydrostatic transmissions, especially when transmission fluid is warm. Also, engaging the parking brake is recommended when stopping or parking the machine in a confined space with little tolerance for movement.

WARNING

If the transaxle drive belt breaks 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 position. When the machine is stopped or moving slowly, engage the parking brake.

34

B23

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

ADJUSTING CUTTING HEIGHT

WARNING

The engine must be stopped before ad justing cutting height. Disengage the blade clutch (PTO), engage the parking brake, stop the engine, and remove the ignition key. Wait for all move ment to stop before getting off the seat.

Cutting height is adjusted by positioning the four

(4) retainer hitch pins in a series of six vertical holes on the deck support pins. Lift handles have been pro vided on each end of the deck to assist in raising the deck while positioning the hitch pins.

Cutting heights range from 1.5 in. (38 mm) [top holes] to 4 in. (102 mm) [bottom holes] in 1/2 in.

(13 mm) increments.

Lift Handle

Deck Support

Pin

Operating Instructions

1. Raise the seat panel.

2. Pull up on each transaxle lockout arm and move toward the center of the machine to engage the step that holds the arm in the UP

(unlocked) position.

3. The mower will “freewheel” with the arms in the LOCKOUT position. The levers must be in the highest position to completely unlock the transaxles.

Transaxle Lockout Arm

Transaxle Lockout Arm - Freewheel Position

4. After moving the mower, release the arms, placing them down in the normal OPERATING position. The transaxle lockout arm ends should be completely retracted against the chassis, otherwise operation of the transaxle may be erratic.

Washer

Hitch Pin

Cutting Height Adjustment

TRANSAXLE LOCKOUT

IMPORTANT: DO NOT TOW this mower faster than 2 mph (3.2 km/h) with the transaxle lockout engaged. Towing can produce excessive internal pressure and damage the transaxle(s).

To move the mower with the engine NOT running

(dead battery, maintenance, etc.), the transaxles need to be unlocked (released).

Transaxle Lockout Arm

Transaxle Lockout Arm - Normal Operating

Position

35

Operating Instructions

RECOMMENDATIONS FOR MOWING

DANGER

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

36

Avoid Low Hanging Branches

IMPORTANT: Operate the engine at full throttle 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 shield clean.

● Mow with sharp blades . A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed).

● 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 full throttle for the best cutting action. Mowing with a lower engine RPM causes the mowing

B23 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 on page

23 .

● 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 skid ding of the drive tires. Use smooth control move ments of the steering levers since the transaxles are “power boosted controls” and jerk ing 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).

● When using a side discharge mower deck, the side discharge deflector shield must not be removed and must be kept in the lowest possible position to deflect grass clippings and thrown objects down ward. Orient the side discharge away from side walks or streets to minimize cleanup of clippings. When mowing close to obstacles, orient the side dis charge away from obstacles to reduce the chance of damage to property by thrown objects.

Discharge

Shield

Side Discharge Deflector

Shield in Lowest Position

B23

● 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 slope operating angle is 15 degrees or 27% grade .

Maximum

Recommended

Slope -

Do Not Operate on Steep Slopes

8600-

14

60 lb·f t (81 N ·m)

8600-

15°

52 in.

Maximum Recommended Slope

14 in.

Operating Instructions

DANGER

Do not mow or drive the tractor within 5 feet

(1.5 meters) of an embankment or retaining wall with drop off.

RECOMMENDATIONS FOR TOWING

When equipped with a factory installed hitch or factory authorized hitch kit, the maximum towing capacity on flat ground is 250 lbs (113 kg) gross trailer weight. The maximum tongue weight is 50 lbs (23 kg). Use caution when towing on slopes, rough terrain or when conditions limit traction.

● Do not operate on slopes greater than 5 degrees (9%).

● Do not tow with PTO clutch or mower blades engaged.

● Do not allow people to ride in or on towed trailers.

5 FT

MINIMUM

No Driving Zone

37

Operating Instructions

To avoid potential deck and/or tractor damage while using the tilt-up deck, the following recommendations are offered:

● Do not move the tractor with the deck in the tilt-up position since both the roller wheels (on the back of the deck) may be damaged by moving the tractor. The tilt-up configuration should only be used when the tractor is parked.

● The tractor seat should never be tilted forward with the deck in the tilt-up position.

This can cause the deck to unhook from the tractor and fall with considerable force, potentially causing deck or tractor damage and/or bodily injury.

● When transporting a tractor with the deck in the tilt-up position (on a truck or trailer), the deck should be secured to the vehicle with a strap or rope (stop vertical movement). This will prevent the deck from bouncing on the rear roller wheels (causing breakage). This will also prevent the deck from unhooking from the tractor and falling, potentially causing deck or tractor damage. Damage to other items parked in front of the deck may also occur.

B23

38

Maintenance Instructions

MAINTENANCE SCHEDULE CHART

CAUTION

Maintenance procedures requiring special training or tools should be performed by a trained technician.

Service Item

RECOMMENDED SERVICE INTERVALS - MODEL B23

Daily

25

Hours

100

Hours

200

Hours

300

Hours

400

Hours

Check Engine Crankcase Oil Level

Check/Clean Engine Air Cooling System* x x x Clean Grass Buildup Under Deck

Service Mower Blades

Check Security of Air Filtration Components

Check Air Filter Restriction Gauge

Lubricate Grease Fittings and Oil Points*

Check Transaxle Fluid

Check Tire Pressure

Check Drive Belts

(Engine/PTO, Ground Drive)

Check Deck Gearbox Oil Seals x x x x x x x x x Check Safety Switch System

Check Security of Drive Tire

Mounting Nuts (75 to 85 lb

·

ft)

Check Blade Brake Action x x

Yearly

Every

2 Years

Ref.

Page

41

48

51

54

53

49

45

45

54

55

55

56

54

56

Clean Transaxle Housing

Clean Engine Cooling Fins

Check Air Filter Element Δ

Check/Regap Spark Plugs

Change Engine Crankcase Oil**

Change Engine Oil Filter***

Replace Fuel Filter

Change Transaxle Oil and Filter ΔΔ

Replace Air Filter Element, and Safety Filter Δ x x x x x x x x x

52

48

52

56

41

41

60

45

52

Check/Adjust FSC Friction Lock

Check Fuel Lines and Clamps

Service Engine Starter

Check PTO U-Joints for Wear/Looseness

Service Battery

Check Transmission Control Settings x x x x x

57

56

56

56

53

Replace Fuel Lines and Clamps

Replace Dust Ejection Valve Δ x x x

57

56

52

Replace Ignition Wires x 56

* More often in extremely dusty or dirty conditions

** Factory service uses Kohler PRO ® oil. If conventional oil is used for oil changes instead of the Kohler PRO ® , the oil must be changed every 100 hours.

*** Factory service uses a Kohler PRO ® filter. If a conventional Kohler filter is used for oil changes instead of the

Kohler PRO ® version, the filter must be changed every 200 hours.

Δ Air cleaner is remote mounted Donaldson Radialseal™ unit, replace filter(s) every 400 hours and dust ejection valve every two years or when worn or damaged

ΔΔ Change transaxle oil after the initial break-in period of 75-100 hours operation

39

Maintenance Instructions

Kohler Tips

Fuel System

● Fuel must be clean—free from water, dirt, and or ganic material.

● Change fuel filter on a regular basis and when contamination is suspected or found in the fuel.

Starting/Stopping

● Start engine with the throttle advanced off idle

(1/4 to 1/2 throttle). This will aid starting, especially in cold weather.

● Keep the battery fully charged.

● Match crankcase oil viscosity to the ambient tem perature, allowing the engine to crank faster and start easier.

● Allow engine to run at idle for a few seconds be fore stopping engine to avoid run-on or backfiring.

Cooling System

CAUTION

DO NOT use water or a pressure washer to clean the cooling system on an air-cooled engine; mud may form under the cooling shroud on the cylinder head and cooling fan resulting in engine overheating.

● Keep engine air intake screen and cylinder head fins free of grass clippings, chaff, and dirt. Inspect intake screen and cooling fins for cleanliness and no damage.

● Periodically remove two access panels in the en gine shroud to inspect and clean cylinder head cool ing fins.

● Check performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

B23

● Operate the engine at full speed when mowing. This allows the engine to produce full horsepower and move more cooling air through the engine cool ing fins.

Air Cleaner System

● Use only Donaldson ® air cleaner elements.

Aftermarket elements may not seal in the air cleaner housing, allowing dirt to enter the engine. Also, aftermarket filters often skimp on the filtration media and require more frequent replacement (see following instructions).

● Use the air filter restriction gauge to indicate the need to service the air filter.

● DO NOT overservice or frequently “disturb” the air filter.

A dirty air filter actually cleans better than a new one. Changing and cleaning the air filter too often can ac tually reduce filter efficiency and increase the oppor tunity for traces of dust to enter the engine. Wait until the element really needs servicing as indicated by the air filter restriction gauge.

● When the air filter element is removed or re placed, make sure all dust is cleaned out of the air cleaner housing and hose.

Use a damp cloth and wipe the interior of the canister and hose clean (a lit tle dirt left here will be sucked into the engine and reduce engine life).

When the filter is reinstalled, make sure the element is held tight and straight in the canister for proper seating and sealing.

● Periodically check the air intake hose for cuts, nicks, etc., and the hose clamps for tightness.

Oil

● Use only multi-viscosity oils as specified with the viscosity matching ambient temperatures for the en gine operating conditions. This will aid starting in cold weather and assure proper lubrication in hot weather.

● Use only Kohler oil filters. Aftermarket filters may not seal properly and/or have the incorrect pressure relief valve for proper lubrication.

40

B23

LUBRICATION

WARNING

DO NOT attempt to lubricate the machine with the engine running. Disengage the

PTO clutch, shut off the machine, and remove the ignition key.

Proper lubrication is an important maintenance pro cedure. It reduces wear and makes the machine quieter and easier to operate.

Engine Oil

Engine Break-In Oil

The engine is serviced with Kohler PRO ® 10W-50 synthetic oil and a Kohler PRO ® filter from the factory. Both are rated for 300 hour oil change intervals. A break-in engine oil change is not required. The engine crankcase oil and the filter must be changed after every 300 hours of opera tion.

NOTE: Kohler PRO ® oil and filter are not required, but recommended. If conventional oil and filters are used in the tractor, the oil must be changed after every 100 hours of operation, and the filter must be changed after every 200 hours.

See the

Specifications section for details on which oil and filters are recommended.

Checking Engine Crankcase Oil Level

Check the engine crankcase oil level before use and after each 8 hours of continuous operation.

IMPORTANT: The importance of checking and maintaining the proper crankcase oil level cannot be overemphasized. Check the oil level BEFORE

EACH USE.

1. Park the mower on a level surface with the en gine stopped . Also, make sure the engine is cool and oil has had time to drain into the sump [allow at least five (5) minutes after stopping the engine].

IMPORTANT: NEVER check or add oil with the engine running.

2. Before removing the dipstick, clean the area around the dipstick to keep any dirt or debris out of the engine.

Maintenance Instructions

Lubrication

3. Remove the dipstick, wipe off with a clean rag, then reinsert the dipstick into the tube and press all the way down.

4. Remove the dipstick again and check the oil lev el on the dipstick. The oil level should be within the “Operating Range” on the dipstick

(between the “L” mark and the “F” mark).

IMPORTANT: DO NOT operate engine without a sufficient oil supply in the crankcase.

DO NOT operate with the oil level below the

“L” mark or above the “F” mark on the dipstick.

5. If additional oil is needed, refer to Specifica tions on page 3 for proper crankcase lubricant. Fill up to, but not above, the “F” mark on the dipstick.

IMPORTANT: DO NOT overfill the crankcase (oil above “F” mark) as this CAN result in engine overheating, loss of power, and possible en gine damage.

Full Mark

Operating

Range

{ F

L

Dipstick Operating Range

Low Mark

Changing Engine Crankcase Oil and Filter

Change the engine crankcase oil and filter every

300 hours if the recommended Kohler PRO ® products are being used. If conventional oil and filters are being used, change the crankcase oil after every 100 hours of operation and replace the oil filter after 200 hours of operation.

41

Maintenance Instructions

Lubrication

1. Park the mower on a level surface with the en gine stopped . The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil.

2. Before removing the dipstick, clean the area around it to keep any dirt or debris out of the en gine.

3. Remove the dipstick and open oil drain valve and drain the oil into a suitable container. Be sure to allow ample time for complete drainage.

Dipstick

Oil Fill

Dipstick and Oil Fill

(View from Above Left Side of Tractor)

Oil Filter

Oil Filter Location

(View from the Rear Right Side of Tractor)

B23

Oil Drain

Oil Drain Location

(View from the Rear Left Side of Tractor)

4. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine.

5. Remove the old oil filter and wipe off the filter mounting surface on the engine.

6. Apply a thin coating of clean oil to the rubber gasket on the replacement oil filter.

IMPORTANT: Use ONLY Kohler oil filters.

See the Specifications section for a list of recommended filters. After market oil filters may not seal properly and/or may not have the correct pressure relief valve for proper lubrication.

7. Install the new oil filter on the engine. Turn the filter clockwise until the rubber gasket contacts the sealing surface, then tighten an additional

3/4 to 1 turn .

8. Close the oil drain valve and tighten until snug.

Do not overtighten.

9. Fill the crankcase with new, clean oil. Use only crankcase lubricants recommended by the en gine manufacturer. Refer to Crankcase

Lubricant on page 3 in the Specifications section of this manual or the engine owner’s manual. Use the recommended oil viscosity for the expected ambient temperature. Oil with the correct vis cosity will aid starting in cold weather and assure proper lubrication in hot weather. Fill up to, but not above, the

“F” mark on the dipstick. Crankcase capacity is 2.0 quarts (1.9 liters) plus 1/2 pint (0.24 liters) for the new oil filter.

42

B23

IMPORTANT: Check the dipstick reading be fore adding the last 1/2 pint of oil and fill only to the “F” mark. DO NOT overfill the crankcase (oil above “F” mark) as this CAN result in en gine overheating, loss of power, and possible engine damage.

10. Start the engine and check for oil leaks around the oil filter. Stop the engine, recheck the oil level, and add oil if necessary. (When the engine is first operated with a new oil filter, the oil level will drop slightly as the filter is filled with oil.)

Mower Deck Gearbox Lubrication

NOTE: These instructions apply to all mower decks with gear-driven blades. Refer to DS52 or

DS62 Mower Deck Lubrication on page 44 for the DS52 or DS62 deck with belt-driven blades.

Refer to Mower Deck Spindle Lubrication on page

43 for all mower decks with belt-driven blades.

On gear-driven decks, the mower deck gearboxes

(tee gearbox and blade drive gearboxes) are connected as a unitized assembly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed requiring no scheduled lubrication. However, the gearbox oil seals should be checked every 25 hours for indication of an oil leak; particularly the lower seals on the blade drive gearboxes should be inspected, since they operate in a dirty environment. If an oil leak is noted, replace the oil seal and relubricate the gearbox assembly as follows:

1. Remove gearbox cover (footrest). Deck orientation should be the normal operating position.

Maintenance Instructions

Lubrication

2. Clean the area around the individual gearbox cover plates to prevent contaminants from en tering the gearcase.

3. Remove the screws securing the cover plates on the blade drive gearboxes.

4. Check the level of lubricant in the gearboxes.

If the lubricant is low, add SAE E.P. (Extreme

Pressure) 80W-90 (API GL-5) gear lube until the oil level is up to (submerges) the horizontal shaft in the gearbox (shaft parallel to cover plate).

NOTE: In case the gearboxes are completely drained of oil, approximately 5 fl. oz. (15 cl) of oil per gearbox is required to refill the gear drive assembly.

NOTE: Since the gearboxes are connected as a unit by connector tubes, it is necessary to add oil slowly. Allow a few minutes after adding oil for the oil to flow throughout the assembly and the oil level to stabilize before reassembly.

IMPORTANT: DO NOT overfill the deck gear boxes. The gearbox assembly is not vented, and overfilling with oil will cause excessive pres sure and result in oil leaks.

5. Check condition of the cover gasket and replace if worn or damaged. Reinstall gearbox cover plates; torque screws to 24 lb·in. (3

N·m).

Mower Deck Spindle Lubrication

For mower decks with belt-driven blades, lubricate each deck spindle grease fitting every 25 hours.

Use SAE general purpose lithium or molybdenum base grease for grease fittings.

Blade Drive

Gearboxes

Tee

Gearbox

Mower Deck Gearboxes (Shown with Gearbox

Cover Removed for Clarity)

43

Maintenance Instructions

Lubrication

DS52 or DS62 Mower Deck Lubrication

There are several special lubrication requirements for the DS52 or DS62 mower deck in addition to the require ments detailed in the Chassis and Deck

Lubrica tion Points illustration. Lubricate the locations shown in the Gearbox, Dol ly Wheel, and

U-Joint Lubrication photo and check and maintain oil in the belt drive gearbox.

1. Check the oil level in the belt drive gearbox ev ery 100 hours (or sooner if a visible oil leak has developed). With the deck in the normal oper ating position, remove the level plug in the side of the gearcase. Add SAE E.P. (Extreme

Pres sure) 80W-90 (API GL-5) gear lube to maintain the oil level to the plug. If the oil level is low, check the gear box for any indication of an oil leak. If an oil leak is noted, the gearbox will need to be removed and rebuilt.

2. Lubricate the dolly wheel pivot every 25 hours with general purpose grease.

3. Lubricate both drive shaft u-joints every 25 hours with SAE general purpose lithium or molybdenum base grease.

Belt Drive

Gearbox

B23 reservoir should be between 1/4 in. and 1/2 in.

(0.64 cm and 1.27 cm) from the bottom, near the Cold Level line.

Reservoir

Cap

Hot Level

Cold Level

Hose to

Transaxles

Expansion Reservoir Location

Transaxle Oil and Filter Change

Change the transaxle oil after the initial break-in period of 75-100 hours . Thereafter, change oil every 400 hours of operation as follows:

1. Thoroughly clean the exterior of the transaxle housing before servicing. Remove expansion reservoir cap to allow venting. Using a 1/4 in. hex wrench, remove the plug on the lower inside of each transaxle allowing the oil to drain.

2. Remove the oil filter guard, remove and replace the oil filter using an oil filter wrench.

Tighten filter by turning filter 3/4 to 1 turn after gasket contacts the filter base surface. Reinstall the oil filter guard. Refer to Transaxle Oil

Drain Plug, Filter, and Guard Location illustration.

Dolly Wheel

Pivot

U-Joints

Gearbox, Dolly Wheel, and U-Joint Lubrication

Check Transaxle Fluid Level

● The transaxle oil lubrication is SAE 20W-50

(API Service Class SL or higher) engine oil.

● Inspect both transaxle cases and hoses after every 25 hours of operation for visible leaks.

● The fluid level of the transaxles can be checked visually by looking at the fluid level in the expansion reservoir. When the transaxles are cold, the fluid level in the expansion

44

B23

Oil Filter

Oil Filter

Guard

Oil Drain

Plug

Transaxle Oil Drain Plug, Filter, and

Guard Location

3. Reinstall drain plugs.

4. Remove the oil reservoir hose attached to the elbow on top of the transaxles. Remove the elbow to access the oil fill opening.

5. Fill the transaxles with 20W-50 (API Service

Class SL or higher) oil through the opening

(where the elbows were). Fill up to the opening.

6. Before reinstalling the elbows, screw the locking nut on the elbows down until they are snug

(the o-ring on the elbow will be to the bottom of the o-ring groove).

Elbow

Screw Locking

Nut Down

Reinstall Transaxle Elbows

Maintenance Instructions

Lubrication

7. Reinstall the elbows. When the elbow begins to be snug, position the elbow as it was when removed and tighten the locknut. Reinstall reservoir hoses to elbows.

8. Fill reservoir to 1/4-1/2 in. (6-13 mm) from the bottom with 20W-50 (API Service Class SL or higher) oil.

9. Start and drive the tractor for 1-2 minutes.

10. Check the oil level. It should be 1/4-1/2 in.

(6-13 mm) from the bottom. If oil needs to be added, refer back to steps 5-10.

11. If the transaxles sound noisy or have poor steering response, there may be air trapped in the transaxle that needs to be purged.

To purge air from transaxle, raise the tractor and block with tires off the ground. With engine running, slowly move Forward Speed

Control forward and backward 5 to 6 times.

Turn off engine and check oil level and add if needed. Repeat procedure until transaxles operate at normal noise levels and move smoothly in forward and reverse.

Grease Fitting and Oil Point Lubrication

Lubricate the grease fittings and oil points after every 25 hours of operation. Lubricate more often when operating in dusty or dirty conditions . Use SAE general purpose lithium or molybdenum base grease for grease fittings and light machine oil (SAE 10) to lubricate oil points. Lubricate the locations shown in the Chassis and

Deck Lubrication Points illustration on page

47 .

NOTE: PTO universal joints (on the deck and trac tor) require routine lubrication after every 25 hours of running time. Remove tractor PTO quick disconnect tube assembly for easy access to grease fittings.

NOTE: The best way to lubricate the PTO tube half of the universal joint assembly is to remove it from the tractor. See instructions for removing and install ing PTO quick coupler, refer to Deck Installation on page 21 .

NOTE: The ball bearings on the PTO drive shaft are sealed and do not require periodic maintenance.

45

Maintenance Instructions

Lubrication

Ident

No.

1

2 Deck Caster Wheel Bearing

3 Blade Spindle

4

5

Location

Deck Caster Wheel Fork Pivot

Pivot Assembly, Tilt-Up Deck

Deck Support Arm Socket

Lubrication No.

Type Places

Grease

Grease

Grease**

Grease

Grease

Δ 3

6 Right Angle Gearbox Oil* Δ 1

7 Universal Joint Shaft Assembly Grease**

8 Dolly Wheel Retract

Lever and Linkage

9 Dolly Wheel Pivot

10 Idler Arm Pivot

11 Tee Gearbox, Deck

12

13

14

Blade Drive Gearbox

Steering Lever Pivot

Deck-to-PTO Coupling

Oil*

Grease

Grease

(Grease Spline Slide Area)

15 Deck Support Arm Pivot Grease

16 Universal Joint Tube Assembly Grease**

17 Universal Joint Quick Connect Grease

Spline (Grease Slide Area)

18 Throttle Control Pivot

19 Throttle Control Cable Ends

20 Ground Drive Idler Pivot

21 Transaxle Oil Reservoir

Oil

Oil

Grease

Oil/20W-50*** 1

1

2

1

2

1

1

2

2

4

2

1(2 Δ )

Oil Δ 1

Grease Δ 1

Grease Δ 1

Oil* 1

2

2

1

B23

Ident

No. Location

22 Engine Oil Fill

23 Tail Wheel Caster Fork Pivot

24

25

26

Rear Axle Pivot

Choke Control Cable Ends

Engine Dipstick

27 PTO Belt Tightener Idler Pivot Grease

28 Parking Brake Clevis

29 Body Latch Pivot

30 Parking Brake Lever Pivot

31 Choke Control Pivot

Grease

Oil

Oil***

Oil

Oil

Grease

Oil

Lubrication No.

Type Places

Oil***

Grease

1

2

1

2

2

4

1

1

1

1

* Gearboxes are permanently lubricated and sealed requiring no scheduled lubrication. Oil level should be checked only when an oil leak is noted. Refer to Mower Deck Gearbox

Lubrication on page 43 .

** Grease every twenty-five (25) hours.

*** Refer to Engine Oil on page 41 and Check

Transaxle Fluid Level on page 44 .

Δ Belt-Driven Decks Only

NOTE: DM48 and DS52 decks are shown for reference. For other deck lubrication points, refer to the applicable Deck and Carrier Frame Illustrated Parts

Manual.

2 1 10 3 1 2

3

3

46

4 5 9 8 7 6 5 4

Lubrication Points for Optional Belt-Driven Decks (DS52 Shown)

B23

12

2 1

27

15

5

4

4

28

25 & 31

30

29

28

19

26

25

23

24

Chassis and Deck Lubrication Points (DM48 Shown)

2 1

Maintenance Instructions

Lubrication

7

5

4

4

13

16

17

14

15

11

12

22

23

18 & 19

20

21

47

Maintenance Instructions

Cleaning

CLEANING

CAUTION

If a pressure washer is used on the exposed working parts, avoid water on the electrical parts and the engine cooling system.

Engine Air Cooling System

Cooling Air Intake Screen

To prevent engine overheating and possible engine damage, clean grass clippings, chaff and dirt from the rotating engine cooling air intake screen after every 8 hours of operation . In certain mowing conditions (dry grass, leaves, tree “cotton”, etc.) it may be necessary to check and clean the screen several times each day to prevent engine overheating. Also, visually check inside cylinder head shroud and between cylinder head fins for material packed in this area which would prevent cooling airflow; remove shroud and clean as required.

B23

Cylinder Head Cooling Fins

It is essential for performance and longevity of the air-cooled engine to keep the cylinder head cooling fins clean and free of obstruction. After every 8 hours of operation, check the performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling airflow. If there is little or no airflow, clean the cooling fins as follows:

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

Check Airflow with Hand

48

Rotating Engine Cooling

Air Intake Screen

Keep Rotating Engine Cooling

Air Intake Screen Clean

CAUTION

Operating the engine with a blocked air intake screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage from overheating.

Check Cooling System Airflow

Every 100 hours , inspect and clean the cooling fins (more often when operating in extremely dusty, dirty conditions). Remove the two (2) cooling fin access panels in the engine shroud and clean the cooling fins and external surfaces using compressed air. Make sure to reinstall the access panels before oper ating the engine.

CAUTION

DO NOT use a pressure washer to clean the cooling system on an air-cooled engine, mud may form under the cooling shroud on the cylinder head and cooling fan.

NOTE: If dirt is packed into the cooling fins it may be necessary to remove the engine shroud in order to thoroughly clean the cooling fins.

B23 Maintenance Instructions

Cleaning

IMPORTANT: Yearly, it is good maintenance practice to remove the engine cooling shroud and clean the cylinder head cooling fins and cooling fan thoroughly to prevent overheating and extend engine life. Make sure cooling shroud is reinstalled properly. This procedure will require removing the engine from the chassis.

Engine Cooling

Fin Access Panels

Rotating Engine Cooling

Air Intake Screen

Kohler Engine

Shroud

Engine Cooling Air Intake Screen and Cooling Fin Access Panels

Turbine

Precleaner

Air Intake

Hose

Hose

Clamp

Engine Air Cleaner System

Donaldson Radialseal™ Air Cleaner

A remote mounted Donaldson Radialseal™ air cleaner provides the air filtering function. The paper filter element slides over an outlet tube inside the air cleaner canister with radial sealing action, reducing the possibility of dust leaks due to improper filter installation. Intake design, internal baffling, and a dust ejection valve provide dust separation and automatic precleaning action. Daily or frequent servicing of the air cleaner is not required . Use the air filter restriction gauge on the air cleaner outlet to indicate when the air filter needs servicing–a yellow indicator will show when the filter is overly restricting airflow into the engine.

IMPORTANT: Use only Donaldson air filter elements for replacement (Donaldson P821575 or

Walker 5090-8 Primary/Donaldson P822858 or

Walker 5090-7 Safety Filter). Aftermarket filters may not seal properly or filter efficiently.

Hose

Clamps

Air Filter

Restriction Gauge

860 0-12

Engine

Donaldson

Air Cleaner

Primary Filter

Element

Donaldson

Air Cleaner Cover

Mounting

Band

Safety

Filter

Cover Latch

Engine Air Cleaner System Components

Dust Ejection

Valve

49

Maintenance Instructions

Cleaning

Primary Filter

Element

Cover

Latch

Canister

Dust Ejection

Valve Cover

Air Cleaner Components

(Shown with Cover Being Removed)

IMPORTANT: The Donaldson air cleaner uses a dry paper-type air filter element. NEVER apply oil to the paper element.

Air Filter

Restriction Gauge

Push Button to Reset

Indicator After Service

Air Filter Restriction Gauge Location

Inspect the primary filter element after every 100 hours of service and replace the element and safety filter every 400 hours (or when dirty or damaged). More frequent replacement may be required when operating in extremely dusty conditions as indicated by the air filter restriction gauge.

Service the air cleaner as follows:

1. Release the top and bottom cover latches and remove the air cleaner cover. Wash the cover and dust ejection valve. Check that these components are in good condition. The dust ejection valve is subject to wear and deterioration and should be inspected carefully and replaced every two years or when damaged.

The lips of the valve should close and fit together; any cracks, deformation, or wear in the valve is cause for replacement.

B23

2. Remove the filter element by pulling it out of the canister. There will be some initial resistance as the filter seal breaks loose and slides off of the outlet tube. Gently move the end of the filter up and down and side to side or twist to loosen the seal. Use gentle action to minimize the amount of dust dislodged as the filter is removed.

3. Discard the filter element if excessive air flow restriction has been indicated by the air filter restriction gauge and proceed to Step 6.

Clean the filter element by gently tapping on a flat, hard surface . If excessive restriction still exists after cleaning the element, it should be replaced.

NOTE: Use care when cleaning the filter element. The filter element and/or seal surface may be damaged by tapping too hard or hitting on an uneven surface or sharp edge.

Washing the paper element in water or cleaning solution is not recommended . Do not try to clean the element with compressed air. Do not oil the paper element. Remember, replacing a filter is less expensive than replacing a dusted engine.

4. Use a bright light inside the filter element to inspect for damage. Check the element very carefully for pin holes or other damage that will allow dirt to leak through the paper media.

Replace filter element if dirty or damaged.

5. Check the condition and resilience of the radial sealing surface (inside of the open end) of the filter. Replace the filter if any cracks, tears, or other damage to the sealing surface are noted.

6. Without removing, visually inspect the condition of the safety filter for damage or holes.

The safety filter should only be removed for replacement every 400 hours (or when dirty or damaged).

IMPORTANT: Prior to removing the safety filter, make sure the inside surface of the air cleaner canister is clean. This will minimize the risk of dirt entering the outlet tube which can cause premature engine wear.

7. After removing the safety filter, use a clean, damp cloth and wipe the interior of the air

50

B23 cleaner canister clean. Use special care to clean both the inside and outside surfaces of the outlet tube.

IMPORTANT: Any dust left on the inside of the outlet tube will go into the engine and cause wear.

8. Check the outside surface of the outlet tube for smoothness and cleanness (this is the sealing surface).

9. Insert and seat the safety filter and primary filter el ement carefully into the canister, applying pres sure at the outer rim of the filter; not at the flexible center. Make sure the filter element is completely in place before installing the cover.

IMPORTANT: DO NOT use the cover latches to force the filter into the canister–the cover should fit on with no extra force .

NOTE: DO NOT use petroleum based lubricants on the sealing surfaces of the filter; use tal cum powder or dry silicone lubricants if required for filter installation.

Primary

Filter Element

Canister

Outlet Tube

Radial Sealing

Surface

Safety Filter

Air Filter Element Replacement

10. Install the cover with the word “TOP” properly oriented to the top of the canister. Give the cover a slight twist as it reaches the canister to make sure the tab inside the cover goes into a slot, otherwise the cover will not fit properly.

Make sure both the top and bottom cover latches are securing the cover in place.

Cover Latch

Maintenance Instructions

Cleaning

Orient to Top of Canister

Dust Ejection

Valve Cover Latch

Proper Orientation of Air Cleaner Cover

11. Check the air intake hose for cuts, nicks, or cracks, and check the hose clamps for tightness.

12. Reset the air filter restriction gauge (press button on the end of the indicator).

Grass Buildup in Mower Deck Housing

DANGER

Before raising or removing the mower deck for cleaning, stop the engine, re move the ignition key, and disconnect the spark plug wires.

1. Raise the deck lock lever handle on each side of the carrier frame and pull out to release car rier frame for tilting action.

2. Using the carrier frame lift handle, raise deck to the TILT-UP position and insert the deck hook into the tilt-up latch on the tractor body.

51

Maintenance Instructions

Cleaning

Tilt Bar

Tilt-Up Hook and

Latch Connected

Tilt-Up

Latch

Deck Lock

Lever

Tilt-Up

Hook

Deck Secured in TILT-UP Position

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

3. Clean grass buildup underneath the deck using a pressure washer (and scraper if required).

NOTE: I f the buildup is severe, it may be easier to clean the deck by removing the deck assembly from the tractor and standing the deck assembly on its “nose”.

NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality deteriorates and clogging begins to occur because of too much buildup on the baffling and housing.

4. Lower the deck to the normal operating position and re-engage the deck lock levers.

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

B23

Transaxle Housing

Keeping the housing of the transaxles clean and free of obstruction is essential to avoid overheating the transaxle fluid and shortening transaxle life. The housing should be checked every 100 hours and cleaned if necessary.

To clean the housing, use compressed air and/or a pressure washer. Pay close attention to any oily dirt buildup on the transaxle housings. This may be the result of an oil leak. If an oil leak is noticed, contact your local Walker dealer.

Cooling

Fins

Transaxle Housing and Cooling Fins

IMPORTANT: In case an oil leak develops on the input shaft, the cooling fan blowing dusty air and oil on the transaxle will quickly cover the housing and pack the cooling fins with oily dirt . If this condition occurs, contact your dealer immediately to avoid overheating and dam aging the transaxles.

An additional procedure in maintaining transaxle cooling is to inspect the cooling fans. Replace the fan(s) if blades are missing or damaged.

Cooling Fans

Transaxle Cooling Fans

52

B23

CHECKING/SERVICING

DANGER

To prevent accidental starting of the en gine when servicing or adjusting the ma chine, remove the key from the ignition switch and disconnect the spark plug wires.

Security of Air Filtration Components

NOTE: The following inspection is only an external inspection and should be done without “disturbing” the filtration components.

On a daily basis, visually inspect the external condi tion of the complete air cleaner system. The following items should be inspected:

1. Check the Donaldson Radialseal TM air cleaner canister for damage. Make sure the cover is in place and the cover latches are secure–do not run the engine without the air cleaner cover in place and secure.

2. Inspect the air intake hose for cracks, nicks, and cuts, and check the hose clamps for tightness.

3. Check to make sure the air filter restriction gauge is in place and hose connections are secure.

Battery

IMPORTANT: Make sure battery is securely mount ed in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe dam age to the machine. A hazard may be created by damage to critical working parts and safety systems.

NOTE: Checking electrolyte level is not required if equipped with a sealed, maintenance-free battery.

Maintenance Instructions

Checking and Servicing

CAUTION

Important Battery Service, Installation, and

Charging Tips:

● Do not allow the battery cables to touch opposing terminals. When connecting battery cables attach the positive (+) cable to positive (+) battery terminal first, followed by negative (-) cable to negative (-) battery terminal.

● Never start the engine when the cables are loose or poorly connected to the battery terminals.

● Never disconnect battery while engine is running.

● Never use a quick battery charger to start the engine.

Cleaning the Terminals

If battery terminals are corroded, remove the battery from the mower. Using a wire brush, remove corro sion with a solution of one part baking soda and four parts water . Rinse with clean water. Coat the terminals with petroleum jelly or terminal protector spray to retard further corrosion.

53

Maintenance Instructions

Checking and Servicing

Charging the Battery

DANGER

BATTERIES PRODUCE EXPLOSIVE GASES

● Charge the battery in a well-ventilated area, so that gases produced while charg ing can dissipate.

● Keep sparks, flames, and smoking materials away from the battery at all times.

● Make sure the battery charger is unplugged before connecting or disconnecting cables to the battery.

1. Disconnect the battery terminals–negative (-) first.

2. Charge the battery at 15 amps for 10 minutes.

DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

3. Reconnect the battery terminals starting with the positive (+) terminal.

Tire Pressure

Inflate tires to pressures shown below:

Deck Caster Wheel* = 20 PSI (137 kPa)

Drive

Tailwheel

= 15 PSI (103 kPa)

= 20 PSI (137 kPa)

* If equipped with optional pneumatic tires

Wheel Nut Torque

Check the eight (8) nuts that mount the drive tires.

Every 100 hours they should be torqued to 75 to

85 lb·ft (102 to 115 N·m).

B23

Sharpen Mower Blades

Check mower blade(s) for straightness, sharpness, condition of the cutting edge, and balance every 10 hours of operation (or more often when mowing abrasive type grass or operating on sandy soils). Replace blades if worn, bent, cracked, or otherwise damaged (refer to Mower

Blades on page 61 ). Use the following procedure to check and sharpen blades:

NOTE: Keep blades sharp– cutting with dull blades not only yields a poor mowing job but slows the cutting speed of the mower and causes extra wear on the engine and blade drive by pulling hard.

1. Stop the engine, remove ignition key, and dis connect the spark plug wires before raising the mower deck to service blades.

2. Raise the deck and secure it in the TILT-UP po sition. Refer to Grass Buildup in Mower

Deck Housing on page 51 for deck rais ing instructions.

DANGER

NEVER operate cutter blades with the deck in the raised position.

NOTE: PTO shaft must be disconnected be fore checking blades for straightness.

3. Check the blades for straightness by marking the blade tip position inside the deck housing, and then rotating the opposite end of the blade to the same position and comparing. If the diff erence in blade tip track is more than 1/8 in. (3 mm) , the blade is bent and should be re placed.

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety.

4. If the blade cutting edge is dull or nicked, it should be sharpened. Remove blades for sharpening by grasping the end of the blade

54

B23 using a rag or a thick, padded glove, while loosening and removing the nut, lock washer, and flat washer that mounts the blade.

5. Grind cutting edge at the same bevel as the original. Sharpen only the top of the cutting edge to maintain sharpness.

NOTE: Blades can be sharpened with an electric blade sharpener, conventional electric grinder, or a hand file.

CAUTION

ALWAYS wear eye protection and gloves when sharpening a blade.

Sharpen at

Original 30° Angle

Intersection

Wear Area

30°

Wing

Tip

Do Not Grind or

Sharpen on Underside

Mower Blade Profile for Sharpening

6. Check blade balance by positioning the blade horizontally on a blade balancer or use a nail or shaft through the center hole. If either end of the blade rotates downward, grind (remove) metal on that end until the blade will balance.

The blade is properly balanced when neither end drops. Balance of a blade is generally maintained by removing an equal amount of material from each end of the blade when sharpening.

Maintenance Instructions

Blade Balancer

Checking and Servicing

Blade Balanced on Magnetic

Wall-Mounted Balancer

7. Mount the blade with wing tips pointing up into the housing. For gear-driven decks reinstall the blade, washer, lock washer, and nut.

Tighten the nut to 60 lb·ft (81 N·m).

For belt-driven decks reinstall the spacer (if applicable), blade, washer, and bolt. Tighten the bolt to 70 lb·ft (95 N·m).

Drive Belts

Raise the body and inspect the condition of the two (2) drive belts after every 25 hours of opera tion–engine/PTO drive and ground drive. If the belts show signs of cracking or deteriorating , the belts should be replaced . Refer to Drive Belts on page 58 .

Mower Deck Gearbox Oil Seals

The mower deck gearbox seals should be inspected every 25 hours for evidence of oil leaking; particularly the lower oil seal on the blade drive gearbox . This seal is protected by the trash guard on the blade hub and seal protector plate on the housing, but is still vulnerable to seal damage due to operating in an adverse environment. The mower blade must be removed for inspection of the seal, so it is recommended to inspect the gearbox seals when blades are removed for sharpening . If an oil leak is noted, the seal should be replaced and the gearbox assembly relubricated.

Refer to Mower Deck Gearbox Lubrication on page

43 .

55

Maintenance Instructions

Checking and Servicing

Spark Plugs

Every 200 hours of operation, remove the spark plugs, inspect, clean, and reset the gap (or replace with new plugs ). Before removing the spark plugs, clean the area around the base of the plugs to keep dirt and debris out of the engine. Clean spark plugs with a wire brush. DO NOT use an abrasive grit type cleaner. If the electrodes are burned short or pitted, replace plugs with Champion ® type RC12YC (or equivalent). Check spark plug gap with a wire-type feeler gauge and set the gap at 0.030 in. (0.76 mm). Reinstall and tighten to between 18 and 22 lb·ft (24 to 30 N·m).

Ignition Wires

Good preventive maintenance calls for complete replacement of spark plug wires every two (2) years.

Fuel Lines and Clamps

Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness . Good preventive maintenance calls for complete replacement of fuel lines and clamps every two

(2) years.

Blade Brake Action

WARNING

It is important to check and maintain blade brake action for safe operation of the machine.

Check the function of the cutter blade brake by engaging the blade clutch (PTO), operating the engine at full throttle, then disengaging the clutch and measuring how quickly the blades stop.

Watch the rotation of the blade drive shaft as a visual indication that movement has stopped. If the brake is working properly, all rotation will stop five (5) seconds after disengagement of the clutch. If the brake system malfunctions – blades do not stop in five (5) seconds, the electric clutch/brake assembly will need to be repaired or replaced. Contact your Walker Dealer for this service.

B23

PTO U-Joints

The PTO U-joints should be inspected yearly for looseness and wear. If either is noticed, the respective shaft or tube should be replaced. A worn U-joint can cause vibration and extensive damage to the PTO and the whole machine.

Engine Starter

Yearly or every 500 hours disassemble and clean the solenoid shift starter. Refer to the Kohler Service Manual for this procedure or contact an authorized Kohler engine dealer to perform this service.

Safety Switch System

WARNING

It is important to check and maintain the safety switch system for safe operation of the machine.

There are four (4) safety interlock switches on the tractor; Seat Switch, FSC Neutral-Park Switch,

PTO Switch, and Parking Brake Switch.

NOTE: There is a 1/2 second time delay function on the seat switch to avoid engine power interruption when driving over bumps.

If any of the following conditions occur during starting or operating, a safety interlock switch may be malfunctioning. Contact your Walker dealer for troubleshooting and/or replacement.

● With or without an operator in the seat, the engine starts with the Forward Speed Control

(FSC) and/or the PTO engaged, or the parking brake disengaged.

● With an operator in the seat and the parking brake engaged, the engine starts but dies soon after the parking brake is disengaged and the Forward Speed Control (FSC) or PTO is engaged.

● Without an operator in the seat, the engine starts and continues to run with the Forward

Speed Control (FSC) and/or PTO engaged, or the parking brake disengaged.

● With an operator in the seat, the Forward

Speed Control (FSC) and PTO disengaged, and the parking brake engaged, but the starter will not engage .

56

B23

Forward Speed Control Friction Lock

The FSC friction lock is designed to hold the selected forward travel speed when the steering levers are moved and yet the friction is not too heavy to make moving the FSC control difficult

(too much friction). The procedure for checking the

FSC friction lock is as follows:

1. With the engine off, place the FSC in the full

FORWARD position and pull both steering levers back; the FSC lever should not move.

If the FSC lever moves back when the steering levers are pulled back, the friction needs to be increased.

2. With the steering levers held back, move the

FSC lever back from the FORWARD position.

With a proper amount of friction adjusted, the

FSC lever should move back with a slight amount of resistance (friction). If the FSC lever movement is “stiff”, the friction needs to be decreased.

If the FSC friction lock needs to be adjusted, refer to Adjustments for Transmission Control Step 6

- Forward Speed Control Friction Adjustment on page 64 .

Transmission Control Setting

On a yearly interval or when an out-of-adjustment condition is observed, check the transmission control for proper function as follows:

Neutral-Park

With the mower parked on level ground, start and run the engine, first at idle and then normal operating speeds. With the FSC in the NEUTRAL-PARK position, there should be no movement of either drive tire. If the tire(s) are “creeping” forward or reverse, refer to Adjustments for Transmission

Control Step 3 - Neutral Function Adjustment on page 63 .

Straight Ground Tracking

Check for straight ground track by driving on a smooth, level surface with hands off the steering levers. Set the FSC at different speeds and observe if the mower moves in a straight line (use a cement joint or other line on the ground for reference). If the machine is drifting to the right or left, refer to Adjustments for Transmission Control Step

4 - Straight Tracking Adjustment on page 63 .

Maintenance Instructions

Checking and Servicing

57

Maintenance Instructions

Replacing and Repairing

REPLACING/REPAIRING

DANGER

To prevent accidental starting of the engine when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the spark plug wires.

IMPORTANT: ALWAYS use genuine factory replacement parts. Substitute parts CAN result in product malfunction and possible injury to the operator and/or others.

Drive Belts

There are two (2) individual belts on the machine:

● Engine/PTO Drive Belt

● Ground Drive Belt

The belts may be removed and replaced using the following procedures.

Remove Belts

1. Lift up on the belt to move the spring-loaded idler pulley and loosen the belt.

2. Slide the belt off the pulleys and remove the belt.

Install Belts

Reverse the removal procedure. Start with positioning the belt around the spring-loaded idler pulley and route the belt around the remaining pulleys according the illustrations provided. See the Engine/PTO Belt illustration or the Ground

Drive Belt illusration on page 59 for details.

B23

Ground

Drive Belt

58

Engine/PTO Belt

Belt Locations (Engine Hidden for Clarity)

B23 Maintenance Instructions

Replacing and Repairing

PTO Belt Tightener

Idler Pulley

Fixed Idler

Pulley

PTO

Pulley

Electric

Clutch

LH Transaxle

Engine/PTO Drive Belt

RH Transaxle

Ground Drive

Belt

Engine/PTO Belt

Drive Pulley

Ground Drive Belt

Belt Tightener

Idler Pulley

59

Maintenance Instructions

Replacing and Repairing

Fuel Filter

DANGER

Gasoline is extremely flammable and can be highly explosive. To minimize danger:

● Before servicing the fuel system:

1. Disconnect the spark plug leads.

2. Disconnect the negative (-) battery cable from battery.

● Use only an approved fuel container for gasoline.

● DO NOT allow open flames or sparks near the machine while performing maintenance or refueling; DO NOT smoke while working with fuel.

● Wipe up spilled gasoline immediately and completely.

Model B23 is equipped with an inline fuel filter between the fuel tank and the fuel pump (low pressure fuel pump). Visually inspect the filter periodically, and replace the filter every 400 hours . Use

Walker P/N 5020-3 or Kohler P/N 24-050-13, 9-12 microns for replacement filter.

In-Line

Fuel Filter

Fuel Pump

B23

Fuel Pump Location

IMPORTANT: Replace the fuel filter only in a clean area where the fuel line and connections will not be contaminated by dust and dirt.

1. Expand and slide clamps on either side of the filter away from filter and pull fuel lines off filter.

2. Replace filter, making sure that the arrow on the filter is aligned with the fuel flow through the filter.

3. Verify that the fuel lines and clamps are securely attached, and that no fuel leaks are present.

Blade Overload Shear Bolts

Blade shear bolts are not used on beltdriven decks.

On gear-driven decks, each cutting blade is keyed to the blade hub by two (2) shear bolts (10-24 x

5/8 in. stainless steel machine screws). These bolts are designed to shear and protect the blade drive gearbox from damage if the blade encounters a shock load.

Fuel Filter Location

60

B23

Cutting Blade

Shear Bolts

Cutting Blade Shear Bolts

NOTE: Tightening the 5/8-18 blade mounting nut to 60 lb·ft (81 N·m) is also important for proper shock load protection. It is important to not overtighten the mounting nut since this defeats

(overrides) the function of the shear bolts.

If these bolts shear, remove the blade and install new bolts. Refer to Sharpen Mower Blades on page 54 which describes the blade removal and installation procedure.

After reinstalling the blade, check blade timing (on gear-driven decks) by moving blades through one

(1) complete revolution . Make sure blade tips pass clear of each other. If timing is incorrect, contact your Walker dealer.

Mower Blades

Mower blades are removed and remounted as described in Sharpen Mower Blades on page

54 . During the course of sharpening and inspecting mower blades, if there are any of the following conditions of wear or damage, blades should be replaced for reasons of safety and performance of the machine:

● An excessive amount of the flat section of the blade has been ground away (removed) when the blade is sharpened. Replace the blade when less than a 3/4 in. (19 mm) flat section remains at the blade tip.

● Examine ends of the blade carefully, especially the intersection where the flat section of the blade turns up to form the “wing tip” (refer to the illustration Mower Blade Profile for Sharp ening on page 55 for location of the wing tip and wear area). Since sand and abrasive

Maintenance Instructions

Replacing and Repairing material can wear metal away in this area, the blade should be replaced when metal thickness has worn to 1/16 in. (1.6 mm) or less .

DANGER

When blades are operated over sandy soil, and if blades are allowed to wear, a “slot” may be worn into the wing tip of blade.

Eventually a piece of the blade may break off creating a serious potential for injury or damage.

● Check the blades for straightness by marking blade tip position inside the deck housing and then rotating the opposite end of the blade to the same position and comparing. If the difference in blade tip track is more than 1/8 in. (3 mm) , the blade is bent and should be replaced .

● Inspect the blade surface, especially in formed areas, for cracks . Replace the blade if any cracks are found.

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety.

Reinstall the blades following procedure from

Sharpen Mower Blades on page 54 . If blades are replaced, always use Walker original equipment blades to ensure safety and optimum performance. The quality and performance of replacement blades offered by other manufacturers cannot be guaranteed, they could be dangerous.

CAUTION

ALWAYS use genuine factory replacement parts. Substitute parts CAN result in product malfunction and possible injury to the operator.

61

Maintenance Instructions

Adjustments

ADJUSTMENTS

Transmission Control

IMPORTANT: The proper adjustment of the transmission control stops is essential for efficient operation and life of the transaxle. These stops are properly adjusted at the factory and should only require read justment if the transaxle or related control linkage is removed or changed.

NOTE: It would not be unusual for a new machine, after the initial 5 or 10 hours of operation, to begin to not travel straight (this is due to the break-in of the transmissions). To fine tune tracking, refer to Step 4 - Straight Tracking Adjustment on page 63 .

Step 1 -

Steering Lever Position Adjustment

NOTE: For proper operation, the steering levers should be adjusted to sit evenly using the following procedure.

1. Examine the steering levers to make sure they are parallel front to back in relation to one an other. If they are not equal, adjust accordingly. (The handles may or may not be even at this point.)

NOTE: The LH steering lever is nonadjust able . This procedure will require adjustment of the RH lever to make it even with the LH lever.

Levers should sit parallel to each other or out. Turning the stop bolt in will make the

RH lever move back, and turning it out will make it move forward. Tighten the locknut.

Stop

Bolt

Adjustment

Slide

B23

Stop Bolt Location

Step 2 -

Steering Handle Adjustment

An adjustment range of approximately 3 in.(76 mm) is available on the steering handles–the handles can be adjusted forward or aft depending on the arm length of the operator. The handles can be adjusted by loosening the locknut at the pivot point and the locknut holding the handle in position in the adjustment slide. Adjust han dles into most comfortable position and tighten both locknuts.

Locknut

(Position)

Locknut

(Pivot Point)

Lever Alignment

2. Adjust the position of the RH lever by turning the stop bolt in the Speed Control Actuator in

Steering Handle Adjustment

62

B23

Step 3 -

Neutral Function Adjustment

1. Securely block the tractor up so the drive tires are off the ground.

2. Adjust the tracking adjustment nuts at the front of both control rods so that 2 or 3 threads are visible, then loosen the jam nuts on the ball joints at the back of the control rods.

8600-2

Control Arm

Control Rods

Tracking Adjustment Nuts

Transmission Control Rod and Arm Location

(Components Hidden for Clarity)

Ball Joint

Jam Nut

Control Rod

FWD

REV

Tracking Adjustment Nut

(Adjusts Length of Control Rod)

Transmission

Control Arm

Tracking Adjustment Components

Maintenance Instructions

Adjustments

WARNING

The following adjustments are made with the engine running. Keep all body parts and tools away from rotating and hot components, and secure all loose clothing.

3. With the FSC in NEUTRAL-PARK , start the engine. With the engine at normal operating speed, check for movement of the drive wheels.

4. Using a wrench on one tracking adjustment nut, rotate the control rod counterclockwise just until the wheel on that side begins to move forward . Then, counting the turns required, rotate the control rod clockwise just until the wheel stops and then begins to move in reverse . Rotate the control rod back counterclockwise half the number of turns required to make the wheel go from moving forward to reverse. The transmission is now centered in the neutral window. Tighten the jam nut on the ball joint and repeat the same procedure on the other transmission.

5. Turn off the engine, and then lower the drive tires onto the ground.

Step 4 -

Straight Tracking Adjustment

1. Sit in the seat, start the engine, set throttle at full speed, and with the FSC in the NEU-

TRAL-PARK po sition check for movement of either drive wheel (if either wheel moves backward or forward, re fer to Step 3 - Neutral

Function Adjustment on page 63 and readjust).

2. Check for straight ground tracking on a level surface (with hands off the steering levers).

Set the FSC at several different speeds and ob serve if the machine moves in a straight line (use cement joint or other line on ground for refer ence).

3. If tracking is not straight, shorten the control rod on the faster side by turning the tracking adjustment nut clockwise. If straight tracking and neutral are both achieved, proceed to the next step. If straight tracking and neutral cannot both be achieved, turn the tracking adjustment nut on the faster side counterclockwise until neutral is restored.

63

Maintenance Instructions

Adjustments

4. Lengthen the control rod on the slower side by turning the tracking adjustment nut counterclockwise until straight tracking and neutral are both achieved.

Step 5 -

Maximum Forward Speed Adjustment

If the machine is tracking straight throughout the speed range except at maximum speed, use the following adjustment procedure:

1. Raise the seat panel to access the maximum speed adjustment set screw. Loosen the jam nut and turn the adjustment screw counterclockwise to allow the FSC lever to move

(over-travel) to the full forward position.

2. Lower the seat to the normal operating position and observe if one steering lever is ahead of the other. Raise the seat and turn the adjustment screw clockwise until the steering levers are aligned with each other with the

FSC lever full forward (this may take several trials to bring the levers to alignment). Tighten the jam nut.

3. Test drive the machine to confirm that straight tracking is being achieved at maximum forward speed (FSC lever in full forward position).

T-Handle

Hex Wrench

Maximum

Speed Adjustment Screw

Step 6 -

Forward Speed Control Friction

Adjustment

FSC Full

Forward Position

Pull Steering

Levers Back to

Check Friction

Lock

B23

FSC Friction Adjustment Test

(Checking Friction Lock)

1. Place the FSC lever in the full FORWARD position, and pull both steering levers fully back; the FSC lever should not move. If the

FSC lever moves back the friction needs to be increased .

2. With the steering levers held back, move the

FSC lever back from the FORWARD position.

With a proper amount of friction adjusted, the

FSC le ver should move back with a slight amount of re sistance (friction). If the FSC lever movement is “stiff”, the f riction needs to be decreased .

3. The FSC friction is increased or decreased by tightening or loosening the friction adjustment nut . Loosen or tighten the nut and check the control function until the conditions of both steps 1 and 2 (above) are met.

FSC Friction

Adjustment Nut

Maximum Speed Tracking Adjustment

(Shown with Parts Removed for Clarity)

FSC Friction Adjustment Nut

64

B23

Tilt-Up Deck Adjustable Stop

When the carrier frame hinge joint is properly ad justed, the deck lock levers should move in and out of the engaged and disengaged positions freely. All four (4) hitch pins used for height adjustment should sit flush on the washers above the deck pin bushing. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the same side to lower the pin.

Adjustments are made by loosening the jam nut and tightening or loosen ing the set screws on the

Deck Mount Pivot Brack ets. Retighten the jam nut when the adjustment is complete.

Jam Nut

Set Screw

Tilt-Up Deck Adjustable Stop

Maintenance Instructions

Adjustments

65

MAINTENANCE AND SERVICE RECORD SHEET

DATE SERVICE ENGINE

ITEM HOURS

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66

LIMITED WARRANTY

FOR

WALKER MODEL B23

RIDER MOWERS

1. WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:

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 two (2) years* after the 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 Mower are covered by this warranty except the following components which are warranted separately by their respective manufacturers:

Kohler Engine

Battery

The available warranties covering these items are furnished with each mower. Walker does not assume any warranty obligation, liability or modification for these items, which are covered exclusively by the stated warranty of the respective manufacturers noted above.

* Extended warranties are offered for the following powertrain components:

• A two (2) year or 2000 hour (whichever comes first) warranty is offered for Hydro-Gear ZT3100 Hydrostatic transaxle; covers full cost of replacement up to 1000 hours of use, and after 1000 hours warranty coverage is prorated against 2000 hours.

2. WHAT THIS WARRANTY DOES NOT COVER:

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 mower to and from the place where the inspection and/or warranty work is performed.

3. HOW TO OBTAIN SERVICE UNDER THIS WARRANTY:

Warranty service can be arranged by contacting the dealer where you purchased the mower 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.

4. WARRANTY LIMITATION:

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 WARRAN-

TIES 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 MOWER. 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.

67

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

FORM NO. 042621 PRINTED IN USA www.walker.com ©2021 WALKER MFG. CO

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