Walker H24d User manual

Please Read and Save These Instructions
For Safety, Read All Safety and Operation
Instructions Prior to Operating Machine
Beginning S/N: 155013
P/N 2000-26
Operator’s Manual
Safety, Assembly, Operating, and Maintenance Instructions

Foreword
Thank you. . .for purchasing a Walker mower. Every e󰀨ort has been made to provide you with the
most reliable mower on the market, and we are sure you will be among our many satised custom
ers. 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 specic 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
prop er 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 any
thing in this manual is confusing or hard to understand, please contact your local authorized dealer
or call our service department, at (970) 2215614, for clarication before operating or servicing this
mower.
This manual covers Model H24d with the Kohler KDW1003 (23.7 HP) diesel 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.
Specications given are based on the latest information available at the time this manual was pro
duced for a tractor with standard equipment. Optional equipment is available and may a󰀨ect the
standard specications listed.
Walker Mfg. Co. is continually striving to improve the design and performance of its products. We
reserve the right to make changes in specications and design without thereby incurring any obliga
tion relative to previously manufactured products.
Sincerely,
WALKER MANUFACTURING COMPANY
Bob Walker, President

Table of Contents
General Information ________________ 1
HIGHLIGHTED INFORMATION _____________ 1
GLOSSARY ____________________________ 1
IDENTIFYING NUMBER LOCATIONS ________ 1
ENGINE SERIAL NUMBER LOCATION_______ 2
SERVICING OF ENGINE AND
DRIVETRAIN COMPONENTS ______________ 2
Specications________________________ 3
ENGINE________________________________ 3
ELECTRICAL SYSTEM ___________________ 3
TRANSAXLE____________________________ 3
BLADE DRIVE __________________________ 4
TIRE SIZE ______________________________ 4
TIRE PRESSURE ________________________ 4
DRIVE BELTS ___________________________ 4
SEAT __________________________________ 4
FRAME/BODY CONSTRUCTION____________ 4
DIMENSIONS (Tractor and Mower) __________ 5
DECK CHART ___________________________ 5
Component Identication ___________ 6
Safety Instructions __________________ 9
BEFORE OPERATING ____________________ 9
OPERATING ___________________________ 11
MAINTENANCE ________________________ 13
SAFETY, CONTROL,
AND INSTRUCTION DECALS _____________ 14
Assembly Instructions______________ 19
SETUP INSTRUCTIONS__________________ 19
Tire Installation (Tractor) _______________ 19
Battery Service _______________________ 19
Wet Battery Service __________________ 19
Dry Battery Service___________________ 19
Battery Charging_____________________ 20
Battery Installation ___________________ 20
Mower Deck Assembly_________________ 20
Deck Caster Wheels Installation _________ 20
Deck Discharge Deector
Shield Installation (DS60) ______________ 21
PTO Shaft Guard Installation ___________ 21
Tilt-Up Roller Wheel Installation _________ 21
Mower Deck Installation on Tractor_______ 21
Deck Installation _____________________ 21
Deck Leveling _______________________ 23
Measuring Deck Levelness ____________ 23
Deck Leveling Procedure _____________ 24
PREOPERATING CHECKLIST_____________ 25
Operating Instructions _____________ 28
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 28
Ignition Switch _______________________ 28
Engine Throttle _______________________ 29
Body Latch __________________________ 29
Forward Speed Control (FSC) ___________ 29
Fuel Pump Priming____________________ 29
Steering Levers_______________________ 30
Blade Clutch (PTO)____________________ 30
Parking Brake ________________________ 30
Circuit Breakers ______________________ 31
Glow Plug Activation Light _____________ 31
Battery/Charge Malfunction Light________ 31
Oil Pressure Warning Light/Horn ________ 31
Water Temperature Warning Light/Horn ___ 31
Transaxle Lockout Arms _______________ 32
Hourmeter ___________________________ 32
Roll-Over Protection System (ROPS) _____ 33
Suspension Seat______________________ 34
STARTING THE ENGINE _________________ 37
ADJUSTING GROUND
SPEED AND STEERING__________________ 37
ENGAGING THE BLADE DRIVE ___________ 39
STOPPING THE MACHINE _______________ 40
FUEL TANK SELECTOR VALVE ___________ 41
ADJUSTABLE FOOT RESTS ______________ 41
ADJUSTING CUTTING HEIGHT____________ 42
Transport Position ____________________ 42
TRANSAXLE LOCKOUT _________________ 42
RECOMMENDATIONS FOR MOWING ______ 43
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 45

Table of Contents
Maintenance Instructions __________ 46
MAINTENANCE SCHEDULE CHART _______ 46
IMPORTANT TIPS FOR CARE
OF THE KOHLER ENGINE ________________ 47
Fuel System _________________________ 47
Starting/Stopping _____________________ 47
Cooling System ______________________ 47
Air Cleaner System____________________ 47
Oil__________________________________ 47
LUBRICATION _________________________ 48
Engine Oil ___________________________ 48
Engine Break-In Oil___________________ 48
Checking Engine Crankcase Oil Level ____ 48
Changing Engine Crankcase Oil/Oil Filter__ 48
Mower Deck Spindle Lubrication ________ 50
DR52, DS60 or DR64 Mower
Deck Lubrication _____________________ 50
Check Transaxle Fluid Level ____________ 50
Transaxle Oil and Filter Change _________ 50
Grease Fitting and Oil Point Lubrication __ 51
CLEANING ____________________________ 54
Engine Air Cleaner System _____________ 54
Donaldson Radialseal™ Air Cleaner______ 54
Engine Cooling System ________________ 56
Radiator Screen and Cooling Fins _______ 56
Flushing Radiator and Changing Coolant __ 57
Grass Buildup in Mower Deck Housing ___ 57
Transaxle Housing ____________________ 58
CHECKING/SERVICING__________________ 60
Engine Cooling System ________________ 60
Coolant Level _______________________ 60
Security of Air Cleaner System __________ 60
Battery______________________________ 60
Electrolyte Level _____________________ 60
Cleaning the Terminals ________________ 61
Charging the Battery__________________ 61
Tire Pressure_________________________ 61
Wheel Nut Torque _____________________ 61
Sharpen Mower Blades ________________ 61
Drive Belts___________________________ 62
Fuel Lines and Clamps_________________ 62
Radiator Hoses and Clamps ____________ 62
Transmission Control Setting ___________ 63
Neutral-Park ________________________ 63
Straight Ground Tracking ______________ 63
Blade Brake Action____________________ 63
PTO U-Joints ________________________ 63
Safety Switch System__________________ 63
Forward Speed Control Friction Lock_____ 64
REPLACING/REPAIRING_________________ 65
Drive Belts___________________________ 65
Engine/PTO Belt _____________________ 66
Ground Drive Belt ____________________ 67
Deck Drive Belt ______________________ 68
Fuel Filter ___________________________ 69
Mower Blades ________________________ 69
ADJUSTMENTS ________________________ 71
Transmission Control__________________ 71
Steering Lever Position Adjustment ______ 71
Steering Handles Adjustment ___________ 71
Neutral Function Adjustment____________ 72
Full Forward Speed Adjustment _________ 73
Straight Tracking Adjustment ___________ 74
FSC Neutral Switch Adjustment _________ 74
Forward Speed Control
Friction Adjustment __________________ 75
Blade Clutch (PTO)____________________ 76
Clutch Engagement/Belt Tension ________ 76
Clutch Disengagement/Brake Action _____ 77
Idler Pulley Maximum Travel Adjustment __ 77
Blade Brake Band Adjustment __________ 78
Warranty _____________________ 79

General Information
1
HIGHLIGHTED INFORMATION
Walker Manufacturing recommends that any ser vice
requiring special training or tools be performed by
an authorized Walker Mower dealer. There are sev
eral general practices to be aware of in the area of
safety. Most accidents associated with the opera
tion or maintenance of a Walker Mower are caused
by disregarding basic safety precautions or specic
warnings. Such accidents, in most cases, can be
prevented by being aware of the dangers present.
Information of special importance has been high
lighted in bold type in this manual. Refer to Safety
Instructions for the meanings of DANGER, WARN-
ING, CAUTION, IMPORTANT, and NOTE.
GLOSSARY
There are many terms that are either unique to this
equipment or that are used as acronyms. The
following terms and their denitions will help while
using this manual:
●DECK is the mowing attachment mounted on
the front of the tractor which includes the carrier
frame, deck housing, blade spindles, 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.
●REAR DISCHARGE (RD) discharges mowed
material from the back of the mower deck.
●RIGHT HAND (RH) refers to the righthand side
of the tractor when the operator is seated facing
forward in the tractor seat.
●ROLL-OVER PROTECTION SYSTEM (ROPS)
o󰀨ers enhanced operator protection in the event
of a rollover type accident.
●SIDE DISCHARGE (SD) discharges mowed
material from the right side of the mower deck.
●STEERING LEVERS steer the tractor by con
trolling the two transaxles.
●TRACTOR is the prime mover, including the
en gine, 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 releases the transax
les to permit freewheeling the tractor.
IDENTIFYING NUMBER LOCATIONS
The tractor serial number plate is a󰀩xed to the trac
tor body just below the left rear corner of the seat.
The mower deck serial number plate is a󰀩xed
alongside the spindle cover on the LH side of the LH
mower blade drive. Model and serial numbers are
helpful when obtaining replacement parts and main
tenance 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

General Information
2
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.
Serial Number
Engine Serial Number Location
SERVICING OF ENGINE AND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine and
transaxles are not covered in this manual. Only rou
tine maintenance and general service instructions
are provided. For the service of these components
during the limited warranty period, it is important to
nd a local, authorized servicing agent of the com
ponent manufacturer. Any unauthorized work
done on these components during the warranty
period may void the warranty. If you have any dif
culty nding an authorized outlet or obtaining
warranty service, please contact our Service Depart
ment 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 Kohler Company
Kohler, WI 53044
8005442444
www.kohlerengines.com
Transaxles Hydro-Gear
1411 South Hamilton St.
Sullivan, IL 61951
8777287410
www.hydrogear.com

Specications
3
MODEL H24d
ENGINE
Manufacturer/Model Kohler KDW1003, 3 Cyl., Diesel (Liquid Cooled)
Displacement cu. in. (cc) 62.7 (1028)
Max. Power HP (kW) 23.7 (17.7) @ 3600 RPM
Governed RPM 3600
Max. Torque lb·ft (N·m)36.8 (50.0) @ 2600 RPM
Idle RPM 1400
Crankcase Capacity qt (L) 2.5 (2.4)
Crankcase Lubricant API CF or Higher Grade Oil Only with 15W40 Viscosity Above 5º F
(15º C), 20W60 Viscosity Above 104º F (40º C), or 5W30 Viscos
ity Below 32º F (0º C).
(See Kohler manual for additional oil recommendations.)
Oil Filter Kohler P/N 2175283S
Fuel Tank Capacity gal (L) 9.4 (35.6), Two Independent 4.7 Gallon Tanks with Selector Valve
Fuel Diesel Fuel 2D
Cooling System Capacity qt (L) 5.4 (5.1)
Cooling Fan Electric Radiator Cooling Fan with Reversible SelfCleaning Action
Coolant 50/50 PreMix Antifreeze/Water
Air Cleaner Remote Mounted Donaldson RadialsealTM (5")  S/N 153116 And On
(Walker P/N 50908 Primary/50907 Safety Filter)
ELECTRICAL SYSTEM
Battery 12 Volt, 340 CCA, (Interstate U1SP40)
Charging System Flywheel Alternator
Charging Output 30 Amp DC (Regulated)
System Polarity Negative Ground
Ignition Diesel with Glow Plugs
Starter 12 Volt Electric RingGear Type, Solenoid Shift
Interlock Switches Ignition Lockout by Seat Switch, Transmission Neutral,
Blade Clutch, and Parking Brake
Circuit Breaker(s) Auto Reset (One 40A, Two 30A)
Manual Reset (One 10A, One 7A)
TRANSAXLE
Manufacturer/Model Dual Hydrostatic HydroGear® ZT3400 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 Transaxles
Parking Brake Internal Mechanical Cog Lock for each Transaxle
(Single Lever Control)

Specications
4
MODEL H24d
TRANSAXLE (continued)
Neutral Transmission Release by Manual Dump Valve
Final Drive Direct Drive Axle from Transaxle
Transmission Fluid
Factory Service 20W50 MultiViscosity Motor Oil (Minimum SL Grade Oil)
Transmission Oil Capacity  oz (L) 77 (2.3)
Transmission Cooling Cooling Fan Mounted on Drive Pulley
Oil Filter HydroGear® P/N 52114 (Walker P/N 20266)
Ground Travel Speed
Forward MPH (km/h)
Reverse MPH (km/h)
010 (016) Innitely Variable
05 (08) Innitely Variable
BLADE DRIVE
PTO Shaft Sliding Spline Shaft with Two (2) HighSpeed UJoints
(Quick Disconnect)
Blade Drive Clutch and Brake Manual Belt Tightener Clutch and Band Brake
[Stops Blades within Five (5) Seconds of Disengagement]
TIRE SIZE
Deck Caster Wheel 13 x 4.506 Pneumatic (6Ply)
Drive 22 x 10.5012 (4Ply LowProle)
Tailwheel 13 x 4.506 (6Ply)
TIRE PRESSURE PSI (KPA)
Deck Caster Wheel 20 (137)
Drive 15 (103)
Tailwheel 20 (137)
DRIVE BELTS
Engine PTO Walker P/N 2230 (Matched Set of 3)
Ground Drive Walker P/N 22481
SEAT Full Spring Suspension with Dampening and Adjustments for Back
Angle, Lumbar Support, and Operator Weight. Standard with Ad
justable/Retractable Armrests.
FRAME/BODY CONSTRUCTION
Frame All Welded Unitized Steel Chassis
Body 14 Gauge Steel
Deck 11 Gauge Steel

Specications
5
MODEL H24d
DIMENSIONS (Tractor and Mower)
Length in. (cm)
Tractor Only 69 (175)
Tractor Wheel Base 45 (115)
Tractor with Tilted Deck
(DR643)
87.75 (223)
Tractor with 64" Rear Discharge
Deck (DR643)
107.75 (274)
Width in. (cm)
Tractor Only (Outside Tire) 46.5 (118)
Tractor with 64" Rear Discharge
Deck (DR643)
66 (168)
Tread Width 36.5 (93)
Height in. (cm)
Tractor Only 46.5 (118)
With ROPS 66.25 (168)
With ROPS Lowered 51.25 (130)
Weight (No Fuel) lb (kg)
Tractor Only 997 (452)
Tractor with 64" Rear Discharge
Deck (DR643)
1434 (650)
DECK DR52 DR64 DS60
Type Belt Driven,
Rear Discharge
Belt Driven,
Rear Discharge
Belt Driven,
Side Discharge
Cutting Width in. (cm) 52 (132) 64 (163) 60 (152)
Cutting Height in. (cm) 1 to 5 (2.5 to 13)
Height Adjustment in. (cm) 1/4 (1) Increments, 17 Positions
Blade Length in. (cm) 18.4 (47) 22.2 (56) 20.5 (52)
Number of Blades 3
Direction of Rotation
(Viewed from top of deck)
Clockwise
Deck Suspension TorsionFlex Frame with Caster Wheels and Counterweight Springs
Maximum Blade RPM 3840 3200 3330
Maximum Blade Tip Speed
ft/min (m/min)
18500 (5640) 18500 (5640) 17870 (5460)
NOTE: The manufacturer reserves the right to make changes in specications shown herein at any time
without notice or obligation. The specications listed are for a standard conguration tractor, and may
change with the addition of optional equipment.

Component Identication
6
Front View and Right Side View
NOTE: Control Identication
shown in Operating
Instructions section.
Forward Speed
Control (FSC)
Friction
Adjustment
Deck Support Arm
(Not Visible)
Deck Height
Lift Chain
Deck Lift
Foot Pedal
(Raises Deck)
Cutting Height Release Lever
(Cutting Height Adjustment)
TiltUp
Hook
Deck TiltUp
Socket
Deck
Caster Wheels
RollOver Protection
System (ROPS)
Body TiltUp
Latch
Deck TiltUp
Bar
Counterweight Springs and
Protective Covers
Deck Support
Arm
Adjustable
Footrest
TiltUp
Latch
Adjustable
Footrest