Walker MB 18 HP User Manual

OWNER’S MANUAL

Safety, Assembly, Operating, and Maintenance Instructions

and ILLUSTRATED PARTS MANUAL

Model MB (18 HP)

™

Please Read and Save These Instructions	Effective Date: 10-01-04
For Safety, Read All Safety and Operation	P/N 4000-1
Instructions Prior to Operating Machine	Price $5.00

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 us at [phone]. 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 call our service department, at [phone], for clarification before operating or servicing this mower.

This manual covers Model MB with the Briggs & Stratton Vanguard 18 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.

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, President

Table of Contents

Owner’s Manual

General Information ________________ 3

HIGHLIGHTED INFORMATION _____________ 3

GLOSSARY ____________________________ 3

IDENTIFYING NUMBER LOCATIONS________ 3 ENGINE SERIAL NUMBER LOCATION ______ 4

SERVICING OF ENGINE AND

DRIVETRAIN COMPONENTS ______________ 4

Specifications _______________________ 5

Component Identification___________ 8

Safety Instructions _________________ 11

BEFORE OPERATING ___________________ 11 OPERATING ___________________________ 12 MAINTENANCE ________________________ 13

SAFETY, CONTROL, AND

INSTRUCTION DECALS _________________ 15

Assembly Instructions _____________ 17

SETUP INSTRUCTIONS _________________ 17 Battery Service _______________________ 17 Mower Deck Assembly ________________ 17

Deck Caster Wheels Installation ________ 17 Deck Discharge Shield Installation ______ 17 PTO Shaft Guard Installation __________ 18 Tilt-Up Roller Wheel Installation ________ 18

Mower Deck Installation on Tractor ______ 18

Deck Installation ____________________ 18 Deck Leveling ______________________ 20

PREOPERATING CHECKLIST ____________ 21

Operating Instructions _____________ 24

CONTROL IDENTIFICATION,

LOCATION, AND FUNCTION _____________ 24

Ignition Switch _______________________ 24 Engine Choke ________________________ 25 Engine Throttle_______________________ 25

Forward Speed Control (FSC)___________ 25

Steering Levers ______________________ 25 PTO Switch __________________________ 25 Parking Brake ________________________ 26

Transaxle Lockout Rods _______________ 26

Hourmeter ___________________________ 26 STARTING THE ENGINE _________________ 28

ADJUSTING GROUND

SPEED AND STEERING _________________ 28

ENGAGING THE MOWER ________________ 30

STOPPING THE MACHINE _______________ 31 ADJUSTING CUTTING HEIGHT ___________ 31

TRANSAXLE LOCKOUTS________________ 32

RECOMMENDATIONS FOR MOWING ______ 32

RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT _______________ 33

Maintenance Instructions__________ 34

MAINTENANCE SCHEDULE CHART _______ 34

IMPORTANT TIPS FOR CARE OF THE

BRIGGS & STRATTON ENGINE___________ 35

Fuel System _________________________ 35 Starting _____________________________ 35 Cooling System ______________________ 35 Air Cleaner __________________________ 35 Oil _________________________________ 35

LUBRICATION _________________________ 36 Engine Oil ___________________________ 36 Engine Break-In Oil __________________ 36

Checking Engine Crankcase Oil Level ___ 36 Changing Engine Crankcase Oil/Oil Filter 36

Grease Fitting and Oil Point Lubrication__ 37 Mower Deck Gearbox Lubrication _______ 40 Transaxle Lubrication _________________ 40

CLEANING ____________________________ 41

Engine Air Cooling System ____________ 41

Air Cleaner System __________________ 41

Grass Buildup in Mower Housing _______ 42 Transaxle Cooling Fins ________________ 43

CHECKING/SERVICING _________________ 43

Security of Air Cleaner System _________ 43

Battery _____________________________ 43

Cleaning the Terminals _______________ 43

Charging the Battery _________________ 43 Tire Pressure ________________________ 44

Sharpen Mower Blades ________________ 44

Drive Belts __________________________ 45

Mower Deck Gearbox Oil Seals _________ 45

Spark Plugs _________________________ 45 Breaker Points _______________________ 45

Fuel Lines and Clamps ________________ 45

Blade Brake Action ___________________ 46

REPLACING/REPAIRING ________________ 46

Drive Belts __________________________ 46 Engine/PTO Belt ____________________ 47 Ground Drive Belt ___________________ 48 Fuel Filter ___________________________ 49

Blade Overload Shear Bolts ____________ 49

PTO Shear Pin _______________________ 49 Mower Blades _______________________ 50

1

Table of Contents

ADJUSTMENTS ________________________ 51 Steering Levers ______________________ 51

Tilt-Up Deck Adjustable Stop ___________ 51

ELECTRICAL SYSTEM __________________ 51

Illustrated Parts Manual

TRACTOR DECALS _____________________ 52

BODY / CHASSIS ASSEMBLY ____________ 54

MAIN COMPONENT

POWER TRANSMISSION ________________ 56 ENGINE GROUP _______________________ 58

HYDROSTATIC GROUND

DRIVE ASSEMBLIES ____________________ 60

STEERING CONTROL ASSEMBLIES_______ 62 ELECTRICAL ASSEMBLY________________ 64

WIRING SCHEMATIC____________________ 66

Operator’s Notes ___________________ 67

Maintenance And Service

Record Sheet _______________________ 68

Warranty ___________________________ 69

2

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 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, blade drive gearboxes, 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.

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

•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) mows but does not collect the mowed material.

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

•TRACTOR is the prime mover, including the engine, drive train, operator seat, and controls to operate the mower.

•TRANSAXLE LOCKOUT RODS 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

3

General Information

Serial Number

Tractor Serial Number Location

Serial Number

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCATION

The Briggs & Stratton engine model, type, and code numbers are located on the left hand of the engine shroud. For the mower model covered by this manual, contact a Briggs & Stratton servicing dealer.

Serial Number

Engine Serial Number Location

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS

The detailed servicing and repair of the engine, transaxle 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

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

Briggs & Stratton	Briggs & Stratton
Engine	800-233-3723
	(24-hour hotline in
	USA & Canada)
	www.briggsandstratton.com

Transaxle	Hydro-Gear
	Sullivan, IL

Gearboxes (Deck) Tecumseh Products Co.

900 North Street

Grafton, Wl 53024

4

Specifications

MODEL	MB
ENGINE
Manufacturer/Model	Briggs and Stratton Vanguard, 2 Cyl. OHV (Air-Cooled)
Displacement	34.7 cu. in. (570 cc)
HP (@ 3600 RPM)	18.0
Max. RPM (No Load)	3600 ± 100
Governed RPM	3600 ± 100
Max. Torque [ft-lb (N m) @ RPM]	29.5 (40.5) @ 2400
Idle RPM	1750
Spark Plug Type	Champion RC14YC
Spark Plug Gap	.030 in. (.75 mm)
Crankcase Capacity	1.5 qts (1.4 liters)
Crankcase Lubricant	SF/SG/SH/SJ or Higher Grade Oil Only with 30W Viscosity
	Above 40° F (4° C)
Fuel Tank Capacity	3 Gallons (11.35 liters)
Fuel	Automotive Grade Unleaded Gasoline (85 Octane)
Cooling System	Air Cooled
ELECTRICAL SYSTEM
Battery	12 Volt, 220 CCA (Interstate PC12/80)
Charging System	Flywheel Alternator
Charging Output	16 Amp DC (Regulated)
System Polarity	Negative Ground
Ignition	Magnetron® Electronic
Starter	12 Volt Electric Key and Solenoid Operated
Interlock Switch	Ignition Lockout by Seat Switch, Transmission Neutral and Blade Clutch
TRANSMISSION
Manufacturer/Model	Dual, Independent Hydro-Gear Integrated Transaxles
Steering	Hand Lever Control / Individual Wheel
Forward Speed Control	Precision Friction Lock Lever, Cruise Control, with Neutral-Park
	Position
Service Brake	Dynamic Braking through Hydrostatic Transmission
Parking Brake	Mechanical Cog Lock in Transmission Gear
Neutral	Transmission Release by Manual Dump Valve
Final Drive	Direct Drive Axle from Transaxle

5

Specifications

MODEL	MB
TRANSMISSION (continued)
Transmission Fluid
Factory Service	20W50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil)
Transmission Fluid Capacity	79 fl oz (2336 ml)
Transmission Cooling	Cooling Fan Mounted on Drive Pulley
Ground Travel Speed
Forward m.p.h. (km/h)	0-8 (0-13)	Infinitely Variable
Reverse m.p.h. (km/h)	0-8 (0-13)	Infinitely Variable
BLADE DRIVE
PTO Shaft	Sliding Spline Shaft with Two (2) High-Speed U-Joints
Blade Spindle	Each Blade (2) Mounts Direct on Peerless Right Angle
	Gearbox with Tee Gearbox in Center Connected to PTO Shaft
	(Complete Geared Drive, Peerless Model 1000 Gearboxes)
Blade Drive Clutch and Brake	12V Electrical (Electromagnetic Clutch and Brake) Switch
	Operated [Stops Blades within Five (5) Seconds of
	Disengagement]
Max. Blade Speed	2900 RPM
[22 in. (56 cm) Blade] @ 3600	[16700 FPM (5090 m/min)]
RPM Engine
TIRE SIZE
Deck Caster Wheel	2.80/2.50-4 Pneumatic (4-Ply)
Deck Caster Wheel (Optional)	8.25 x 2.75 (Semi-Pneumatic)
Drive	18 x 8.50-10 (4-Ply)
Rear	13 x 6.50-6 (4-Ply)
TIRE PRESSURE
Deck Caster Wheel	20 PSI (137 kPa)
Drive	15 PSI (103 kPa)
Rear	20 PSI (137 kPa)
DIMENSIONS (Tractor and Mower)
Length
Width
36 in. (91 cm) SD Model	41-3/4 in. (106 cm)
(with Deflector)
42 in. (107 cm) SD Model	47-3/4 in. (121 cm)
(with Deflector)
48 in. (122 cm) SD Model	53-3/4 in. (137 cm)
(with Deflector)
56 in. (142 cm) SD Model	61-3/4 in. (157 cm)
(with Deflector)

6

Specifications

MODEL	MB
DIMENSIONS (continued)
Height	39 in. (99 cm)
Wheel Base (Tractor)	38-1/2 in. (98 cm)
Tread Width (Tractor)	29-3/4 in. (76 cm)
MOWER DECK
Width of Cut	36-, 42-, 48-, or 56-in. (91, 107, 122 or 142 cm)
Cutting Height	1 to 4 in. (3 to 10 cm)
Height Adjustment	7 Positions - 1/2 in. (1 cm) Increment Hitch Pins Installed in
	Multi-Position Deck Support
Blade Size
36 in. (91 cm) SD Model	20 in. (51 cm) Two (2) Clockwise-Rotating Blades with a 4 in.
	(10 cm) Center Overlap
42 in. (107 cm) SD Model	22 in. (56 cm) Two (2) Clockwise-Rotating Blades with a 2 in.
	(5 cm) Center Overlap
48 in. (122 cm) SD Model	25 in. (64 cm) Two (2) Clockwise-Rotating Blades with a 2 in.
	(5 cm) Center Overlap
56 in. (142 cm) SD Model	20 in. (51 cm) Three (3) Clockwise-Rotating Blades with a 2 in.
	(5 cm) Center Overlap
Deck Suspension	Torsion-Flex Frame with Caster Wheels and
	Counterweight Springs
CURB WEIGHT (Approximate)
Tractor Only	564 lb (256 kg)
SD Tractor and 36 in. SD Deck	709 lb (322 kg)
SD Tractor and 42 in. SD Deck	744 lb (337 kg)
SD Tractor and 48 in. SD Deck	769 lb (349 kg)
DRIVE BELTS
Engine PTO	Walker P/N 4230
Ground Drive	Walker P/N 4248
SEAT	Contour-Molded, with Nylon Backed Vinyl Cover and Integral
	Foam Cushion
FRAME/BODY CONSTRUCTION
Frame/Body	3/16 Plate Steel
Deck	11 Gauge Steel

NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation.

7

Component Identification

		NOTE: Control Identification
		shown in Operating
		Instructions section.
Fuel Pickup Line		Tilt-Up Latch
		Counterweight Spring and
Fuel Tank		Protective Cover
and Cap			Deck Support
		Deck Support
			Pin and Height
		Arm
			Adjustment
			Hitch Pins
Forward Speed			Tilt-Up
Control (FSC)
			Deck Handle
Friction
Adjustment
Deck Support Arm
Deck Lift Handle		Tilt-Up
(Cutting Height Adjustment)
		Hook
		Footrests
Deck Discharge Shield
	Footrests	Deck
		Caster Wheels
	Front View and Right Side View

8

Component Identification

	Oil Fill
	Oil Dipstick
Fuel Filter		Muffler
		Cylinder Head
		Cooling Fins
Left Hand	Tailpipe
Drive Wheel
	Electric Clutch
		Tailwheel Fork
Left Hand	PTO Belt	and Wheel
Transaxle	Protective Cover
	Rear View and Left Side View

9

Component Identification

	LH Transmission	Steering Levers
		Dampening Springs
	Control Arm
		RH Transmission
		Control Arm
		RH Transaxle
	LH Transaxle	Expansion
		Reservoir
	Expansion
		and Hose
	Reservoir
	and Hose	RH Transaxle
	LH Transaxle	RH Transaxle
		Lockout Rod
	LH Transaxle
	Lockout Rod	Parking Brake
	Positive (+)	Parking Brake
	Battery Cable	Linkage
	Negative (-)
	Battery Cable	Flexible PTO
		Spider Coupling
	Fuel Pump	Fuel Tank Cap
	Fuel Filter
	Air Cleaner Cover	Air Cleaner
		Cover Latch
	Oil Fill	Fuel Tank
		Fuel Pickup Line
	Oil Dipstick
	Rubber Bumpers
	(Body Support)
	LH Tail Weight	RH Tail Weight
		Muffler Heat Shield
		Top View (Body Raised)

10

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.

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 [phone].

BEFORE OPERATING

1.Read and understand the contents of this Owner’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 Owner’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.

11

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, and the PTO switch is in the DISENGAGED position. Also, the engine should stop if the operator lifts off the seat with the PTO switch in the ENGAGED position.

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.

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.

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.

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

5.In case 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.

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

7.Do not run the engine in a confined area without adequate ventilation. Exhaust fumes are hazardous and can be deadly.

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

12

Safety Instructions

9.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.

10.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.

11.Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Never raise the mower deck while blades are rotating.

12.The maximum recommended side slope operating angle is 20 degrees or 33% 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.

13.Never adjust cutting height with the engine running. Before adjusting cutting height or servicing, disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat.

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

14.For side discharge mower decks, do not operate with the grass deflector chute removed.

Keep the deflector in the lowest possible position.

15.When using the tilt-up deck, observe the following recommendations:

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

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

16.In case of a clogged or plugged mower deck:

a.Disengage the blade clutch (PTO) 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.

17.If the cutting blades strike a solid object or the machine begins to vibrate abnormally, immediately disengage the blade clutch (PTO), stop the engine, and wait for all moving parts to stop. To 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 ft-lb (81.3 N m).

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

19.When leaving the machine unattended, disengage the blade clutch (PTO), stop the engine, and remove the key.

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, making 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.

13

Safety Instructions

5.If the engine must be running to perform a maintenance 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, performance, 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. Substitute parts may result in product malfunction and possible injury to the operator and/or others.

11.Use care when charging the battery or performing maintenance on the battery and electrical system:

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

b.Charge the battery in a well-ventilated space, so gases produced while charging can dissipate. Make sure the battery vents in the caps are open.

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

14

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 Section.

Each End of Mower Deck (5808)

SD Deck Discharge Shield (5848)

LH Fender (5802-2)

RH Fender (5802-1)

Rear Body,

Above Muffler (5805)

Deck Gearbox Cover (5807-3)

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 Section.

Front Body Adjacent to

LH Steering Lever (7818)

Blade Clutch on Front Body Adjacent to RH Steering Lever (6806)

Hydrostat Oil

Reservoir (4024-2)

Parking Brake (4406-8)

Center Body Behind Transaxles

(9804)

Upper Guard

(4107-1)

Belt Routing (4107-4)

Deck Carrier Frame (8647)

Deck Carrier Frame (5865)

Deck Carrier Frame (8653)

16

Assembly Instructions

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.

Battery Service

The battery is a completely sealed, non serviceable battery.

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 created by damage to critical working parts and safety systems.

Mower Deck Assembly

Deck Caster Wheels Installation

1.Remove the bolt, nut, axle spacer tube, and spacer washers from each deck caster wheel fork.

NOTE: Spacer washers are used only when the optional semi-pneumatic deck wheels (8.25 x 2.75) are installed.

2.Fit the axle spacer tube through the wheel hub, position the spacer washer on each side of the hub (if used), and fit the 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 in. Keps nut.

4.Tighten the bolt and nut until the axle spacer tube bottoms against the inside of the wheel fork (will not turn) while the wheel and spacer washers (if used) spin freely without binding.

Deck Caster Wheel Installation

Deck Discharge Shield Installation

(Side Discharge Models Only)

Attach the deck side discharge shield by positioning the shield hinge lug in front of the deck mount and fastening with two 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 chute attached and in the lowest possible position.

Attach Shield

Deck Discharge Shield Installation

17

Assembly Instructions

PTO Shaft Guard Installation

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

Carrier Frame

Tube Sockets

Attach

Guard

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

NOTE: A 2-1/2" diameter tilt-up roller wheel

(P/N 9772) is required for decks installed on the Model MB tractor.

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.

Roller Wheels

Roller Wheel Installation

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.

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.Align and connect the splined PTO shaft and socket halves, as shown in PTO Shaft Connection photo. The PTO shaft has a pilot end to ease alignment of shaft; fit shaft end into socket and rotate shaft until the splines line up as indicated by arrows, then slide together.

Arrows on Shaft and Tube (used to align when sliding together)

PTO Connection

PTO Shaft Connection

4.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.

Deck Support

Arms

Mower Deck Installation

18

Assembly Instructions

Spring Tension Adjustment Nut

Located Under Lower

Spring Hook (not visible)

Counterweight Springs

Clip Onto Body

With Body Tilted Up

Hitch Pins

Lock Deck On

Support Arms

Deck Counterweight Spring Installation

5.Raise mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the body to tension the springs. (Refer to Deck Counterweight Spring Installation photo.)

6.With the counterweight springs connected, the weight on the deck caster wheels should be 15 to 25 Ib (6.8 to 11.3 kg). Check this weight by lifting on the front of the deck carrier frame. If required, the spring tension can be adjusted by tightening or loosening the elastic stop nuts located underneath the lower spring hook. Refer to Deck Counterweight Spring Installation photo.

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Assembly Instructions

Deck Leveling		2.	Check the side-to-side level. Rotate each blade
			sideways and measure the distance from blade
1. Position mower on a smooth, level surface. Set			tip to ground on each side. If measurements
the cutting height to the highest position - 4 in.			vary more than 1/8 in. (3 mm), add a washer
(102 mm) - for easy access under the deck to			shim under the deck support pins on the low side
measure blade height. Refer to ADJUSTING			to level the deck.
CUTTING HEIGHT in Operating Instructions.		3.	Check the front-to-rear level. Rotate the blades
NOTE: A block of wood cut 4 in. (102 mm) high			to point forward. Measure the distance from
is a convenient gauge to measure blade height			blade tip to ground on the front and rear. The
above ground during the leveling process.			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
WARNING
			achieve at least 1/8 in. (3 mm) difference.
			NOTE: The mower deck and support frame
The machine must be shut off during this
			are jig welded; within normal tolerances, very lit-
procedure.
			tle, if any, shimming should be required to level
			the deck. Tire pressure will influence the level-
			ness of the deck. Check the tire pressure as a
			possible cause of the deck not being level.

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

4 in. (102 mm) Wood Block

Deck Leveling

20