Walker C19i User manual

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: 131154
Eective Date: 11.07.14
P/N 6000-19

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 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 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 any-
thing in this manual is confusing or hard to understand, please contact your local authorized dealer
or call our service department, at [phone], for clarification before operating or servicing this
mower.
This manual covers Model C19i with the Kohler Command Pro ECH630 (19 HP) Electronic Fuel
Injection (EFI) 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 pro-
duced 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 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 ENGINEAND
DRIVETRAIN COMPONENTS ______________ 2
Specications________________________ 3
ENGINE________________________________ 3
ELECTRICAL SYSTEM ___________________ 3
TRANSMISSION_________________________ 3
BLADE DRIVE __________________________ 4
TIRE SIZE ______________________________ 4
TIRE PRESSURE ________________________ 4
DRIVE BELTS___________________________ 4
SEAT__________________________________ 4
FRAME/BODY CONSTRUCTION ___________ 4
GHS SYSTEM___________________________ 5
MOWER DECK__________________________ 5
DIMENSIONS (Tractor and Mower) _________ 5
Component Identication ___________ 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
Wet Battery Service __________________ 18
Dry Battery Service___________________ 18
Battery Charging_____________________ 19
Battery Installation ___________________ 20
Mower DeckAssembly_________________ 20
Deck Caster Wheels Installation_________ 20
Deck Discharge Chute Installation _______ 21
Deck Discharge Deector
Shield Installation ____________________ 21
PTO Shaft Guard Installation ___________ 21
Tilt-Up Roller Wheel Installation _________ 22
Mower Deck Installation on Tractor_______ 22
Deck Installation _____________________ 22
Deck Leveling_______________________ 24
PREOPERATING CHECKLIST_____________ 25
Operating Instructions _____________ 27
CONTROL IDENTIFICATION,
LOCATION,AND FUNCTION _____________ 27
Ignition Switch _______________________ 27
Engine Throttle_______________________ 28
Forward Speed Control (FSC) ___________ 28
Steering Levers_______________________ 28
Blade Clutch (PTO)____________________ 28
Parking Brake ________________________ 28
Front Body Latch Release ______________ 29
Transmission Lockout Levers___________ 29
Engine Service Light __________________ 29
Hourmeter___________________________ 30
Oil Pressure Warning Horn _____________ 30
Circuit Breaker (7Amp) ________________ 30
Light Switch (For Optional Lights) _______ 30
STARTING THE ENGINE _________________ 32
ADJUSTING GROUND
SPEEDAND STEERING__________________ 32
ENGAGING THE BLADE DRIVE ___________ 34
STOPPING THE MACHINE _______________ 35
ADJUSTING CUTTING HEIGHT____________ 36
TRANSMISSION LOCKOUT ______________ 36
RECOMMENDATIONS FOR MOWING ______ 37
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 39
GRASS HANDLING SYSTEM (GHS) ________ 40
General Information ___________________ 41
Clogging Checklist____________________ 42
Using the Tilt-Up Deck _________________ 43
Using the GHS Catcher ________________ 43
Powerl ®__________________________ 43
“Full” Signal Horn ____________________ 43
Cleaning the GHS Exhaust Screen _______ 44
Dumping the Catcher __________________ 44
Tailgate Dumping ____________________ 44
Using the Dump Bag__________________ 45
Power Dump Option __________________ 46

Table of Contents
Maintenance Instructions __________ 48
MAINTENANCE SCHEDULE CHART _______ 48
IMPORTANT TIPS FOR CARE
OF THE KOHLER ENGINE________________ 49
Fuel System _________________________ 49
Starting/Stopping_____________________ 49
Cooling System ______________________ 49
Air Cleaner System____________________ 49
Oil__________________________________ 50
LUBRICATION _________________________ 50
Engine Oil ___________________________ 50
Engine Break-In Oil___________________ 50
Checking Engine Crankcase Oil Level ____ 50
Changing Engine Crankcase Oil/Oil Filter__ 51
Mower Deck Gearbox Lubrication________ 51
DS52 or DS62 Mower Deck Lubrication ___ 52
Mower Deck Spindle Lubrication ________ 52
Tractor PTO Gearbox Lubrication________ 53
Checking Gearbox Oil Level ____________ 53
Changing Gearbox Oil ________________ 53
GearAxle Lubrication _________________ 53
Grease Fitting and Oil Point Lubrication __ 53
Hydrostatic Transmission Fluid _________ 56
Checking Hydrostatic
Transmission Fluid Level ______________ 56
CLEANING ____________________________ 57
EngineAir Cleaner System _____________ 57
Turbine Precleaner ___________________ 57
Enginaire™Air Cleaner _______________ 57
Engine Cooling System ________________ 59
CoolingAir Intake System______________ 59
Cylinder Head Cooling Fins ____________ 60
Grass Buildup in Mower Deck Housing ___ 60
GHS Blower__________________________ 61
GHS Exhaust Screen __________________ 62
Hydrostatic Transmission Cooling Fins___ 62
CHECKING/SERVICING__________________ 62
Security ofAir Filtration Components ____ 62
Battery______________________________ 62
Electrolyte Level _____________________ 63
Cleaning the Terminals ________________ 63
Charging the Battery__________________ 63
Tire Pressure_________________________ 63
Wheel Bolt Torque ____________________ 63
Sharpen Mower Blades ________________ 64
Drive Belts___________________________ 65
Mower Deck Gearbox Oil Seals __________ 65
Spark Plugs__________________________ 65
Ignition Wires ________________________ 65
Fuel Lines and Clamps_________________ 65
Engine Starter________________________ 65
Blade BrakeAction____________________ 66
Safety Switch System__________________ 66
Forward Speed Control Friction Lock_____ 66
REPLACING/REPAIRING_________________ 67
Drive Belts___________________________ 67
Engine PTO Drive Belt ________________ 68
Jackshaft Drive Belt __________________ 69
GHS Blower Drive Belt ________________ 70
Hydrostatic Ground Drive Belt___________ 71
Fuel Filter ___________________________ 72
Blade Overload Shear Bolts_____________ 72
Shear Pin (If Equipped) ________________ 73
Mower Blades ________________________ 73
ADJUSTMENTS ________________________ 74
Steering Handles _____________________ 74
Tilt-Up DeckAdjustable Stop____________ 74
GHS “Full” Signal HornAdjustment ______ 74
Operator’s Notes _______________ 76
Warranty _____________________ 79

General Information
1
HIGHLIGHTED INFORMATION
Walker Manufacturingrecommends thatany service
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 specific
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 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 compo-
nents, and cutter blades.
•ELECTRONIC CONTROL UNIT (ECU) con-
trols engine functions such as spark timing,
fuel/air ratio, etc.
•FORWARD SPEED CONTROL (FSC) controls
the maximum forward speed of the tractor;
functioning as a cruise control.
•GRASS HANDLING SYSTEM (GHS®)collects
mowed material and deposits it in the catcher.
•GRASS-PAK®SWITCH is mounted on the
grass delivery spout (in the catcher) and acti-
vates the “full” signal horn when the grass
catcher is full.
•GROUND DRIVE refers to the dual hydrostatic
transmissions which drive the main wheels.
•HYDROSTATIC TRANSMISSION 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 and GHS blower.
•POWERFIL®spreads the mowed material
throughout the interior of the grass catcher by
an oscillating delivery spout.
•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.
•STEERING LEVERS steer the tractor by con-
trolling the dual hydrostatic transmissions.
•TRACTOR isthe prime mover,includingtheen-
gine, drivetrain, operator seat, and controls to
operate the mower.
•TRANSMISSION LOCKOUT releases the hy-
drostatic transmissions to permit freewheeling
the tractor.
IDENTIFYING NUMBER LOCATIONS
The tractor serial number plate is affixed to the trac-
tor 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 num-
bers are helpful when obtaining replacement parts
and maintenance assistance. For ready reference,
please record these numbers in the space provided.
Fill In By Purchaser
Tractor Model No. ______________________
Tractor Serial No. ______________________
Deck Serial No. ______________________
Engine Model No. ______________________
Engine Serial No. ______________________
Date of Purchase ______________________

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 the photo below for the location of the
engine serial number.
Serial Number (Not Visible)
Located Under ECU
Engine Serial Number Location
SERVICING OF ENGINEAND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine,
hydrostatic transmission, 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, au-
thorized servicing agent of the component manu-
facturer. 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 assis-
tance:
Walker Manufacturing Company
5925 E. Harmony Road
Fort Collins, CO 80528
1-970-221-5614
www.walkermowers.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
Hydrostatic Eaton Fluid Power Group
Transmissions Hydraulics Business USA
14615 Lone Oak Road
Eden Prairie, MN 55344 USA
952-937-9800
www.eaton.com/hydraulics
Gearboxes (Deck) Peerless Gear
1555 South Jackson St.
Salem, IN 47167 USA
866-536-8310
www.peerlessgear.com

Specications
3
MODEL C19i
ENGINE
Manufacturer/Model Kohler Command Pro ECH630, 2 Cyl., Gasoline (Air-Cooled),
Electronic Fuel Injection (EFI)
Displacement cu. in. (cc) 42.4 (694)
Max. Power HP (kW) 19.0 (14.2) @ 3600 RPM
Governed RPM 3600
Max. Torque lb·ft (N·m) 34.2 (46.4)
Idle RPM 1200
Spark Plug Type Champion®RC12YC
Spark Plug Gap in. (mm) .030 (0.76)
Crankcase Capacity qt (L) 2.0 (1.9)
Crankcase Lubricant 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 Kohler P/N 28-050-01
Fuel Tank Capacity gal (L) 4.0 (15.1)
Fuel Regular Grade Unleaded Gasoline
(87 Octane Minimum, 10% Ethanol Maximum)
Cooling System Air Cooled
Air Cleaner
Remote mounted EnginaireTM - S/N 133541 and prior
(Walker P/N 5090-1 Primary/5090-3 Safety Filter)
Remote mounted EnginaireTM VLR - S/N 133542 to Current
(Walker P/N 5090-4 Primary/5090-5 Safety Filter)
ELECTRICAL SYSTEM
Battery 12 Volt, 35 AH, 340 CCA
Charging System Flywheel Alternator
Charging Output 15 Amp DC (Regulated)
System Polarity Negative Ground
Ignition Electronic Capacitive Discharge
Starter 12 Volt Electric Ring-Gear Type, Solenoid Shift
Interlock Switches Ignition Lockout by Seat Switch, Transmission Neutral and Blade
Clutch
Circuit Breaker Auto Reset (30A)
TRANSMISSION
Manufacturer/Model Dual Hydrostatic, Eaton Model 7, Each Wheel Independently Driven
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 Pin Lock in Transmission Gear

Specications
4
MODEL C19i
TRANSMISSION (continued)
Neutral Transmission Release by Manual Dump Valve
Final Drive Gear Drive Axle
Transmission Fluid
Factory Service Mobil 1 Synthetic Motor Oil (15W-50)
Transmission Oil Capacity fl oz (L) 19 (0.56)
Transmission Cooling Cooling Fan Mounted on Drive Pulley
Ground Travel Speed
Forward MPH (km/h)
Reverse MPH (km/h) 0-7 (0-11.3) Infinitely Variable 0-5 (0-8) Infinitely Variable
BLADE DRIVE
PTO Shaft Quick Disconnect Splined Shaft with Two (2) High-Speed U-Joints
Blade Drive Clutch and Brake Manual Belt Tightener Clutch and Band Brake
[Stops Blades within Five (5) Seconds of Disengagement]
TIRE SIZE
Deck Caster 8 x 3.00-4 (Pneumatic 4-Ply, Optional Foamed Rubber)
11 x 4.00-5 (Pneumatic 4-Ply) DS52 & DS62 Only
Drive 18 x 8.50-10 (Pneumatic 4-Ply, Low-Profile)
18 x 7.00-8 (Pneumatic 4-Ply, Optional)
Tailwheel 13 x 6.50-6 (Pneumatic 4-Ply)
TIRE PRESSURE PSI (KPA)
Deck Caster Wheel 20 (137)
Drive 15 (103)
Tailwheel 20 (137)
DRIVE BELTS
Engine PTO Walker P/N 8230
Jackshaft Drive Walker P/N 6250-1
Ground Drive, Micro-V Walker P/N 7248
Blower Walker P/N 7234-2
SEAT Contour-Molded, with Nylon Backed Vinyl Cover and Integral
Foam Cushion
FRAME/BODY CONSTRUCTION
Frame All Welded Unitized Steel Chassis
Body 14 Gauge Steel
Deck 11 Gauge Steel
GHS Catcher and Chutes Molded Cross-Linked Polyethylene (UV Stabilized)

Specications
5
MODEL C19i
GHS SYSTEM
Blower 10.5 in. Diameter, Three-Blade Paddle Wheel
Blower Brake Band Brake [Works in Combination with PTO Clutch, Stops
Blower within Five (5) Seconds of PTO Disengagement]
Max. Blower RPM 4000
Grass Catcher Capacity
gal / bu / L 65 / 7 / 246
Full Signal (Grass-Pak®Switch) Oscillating Vane Switch Mounted on Grass Delivery Spout Triggers
Horn Signal
Powerfil ®Oscillating Delivery Spout Driven by 12 Volt Electric Gearmotor
Spreads Material throughout Interior of Catcher @ 35 Cycles/Min
MOWER DECK
Recommended Cut Width
Collection 36 to 52 in. (91 to 132 cm)
Side Discharge 36 to 62 in. (91 to 157 cm)
Mulch 36 to 52 in. (91 to 132 cm)
Cutting Height 1 to 4 in. (2.5 to 10 cm) or 1.5 to 4.5 in. (4 to 11.5 cm)
(DS52 and DS62 Belt Driven SD Decks Only)
Deck Suspension Independent Torsion-Flex Frame with Caster Wheels and
Counterweight Springs
DIMENSIONS (Tractor and Mower)
Length in. (cm)
Tractor Only 64.5 (164)
Tractor Wheel Base 42.25 (107.5)
Tractor with Tilted Deck
(Approximate) 77 (195.5)
Tractor with 42" Collection Deck
(DC42-1) 89 (226.1)
Width in. (cm)
Tractor Only (Outside Tire) 37.75 (96)
Tractor with 42" Collection Deck
(DC42-1) 43 (109.2)
Height in. (cm)
Tractor 47.25 (120)
Weight lb (kg)
Tractor Only 739 (335.2)
Tractor with 42" Collection Deck
(DC42-1) 930 (421.8)
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.

Component Identication
6
Front View and Right Side View
NOTE: Control Identification
shown in Operating
Instructions section.
Deck
Caster Wheels
Anti-Scuff
Roller
Deck SupportArm
Transmission Control
RodAdjustment Nut
(RH)
Tilt-Up Latch
Spring Clip
Counterweight Spring
and Protective Cover
Tilt-Up
Deck Handle
Deck Lift Handle
(Cutting HeightAdjustment)
Grass Handling System
7.0 Bushel Catcher
Transmission Control Rod
Adjustment Nut (LH)
Footrests
Tilt-Up
Hook
Catcher Lift /
Dump Handle
Fuel Tank and Cap
Deck Support Pins
and HeightAdjustment
Hitch Pins