Walker R21 User Manual

Table of Contents R21
General Information 1
Highlighted Information..........................................1
Glossary ................................................................2
Servicing of Engine and Transaxle Components...2
Identifying Number Locations ................................3
Tractor and Deck Identiers ...........................................3
Specications ........................................................4
Component Identication .......................................7
Safety Instructions 10
Safety Before Operating ......................................10
Safety During Operation ......................................11
Safety During Maintenance .................................13
Safety, Control, and Instruction Decals ...............14
Operating Instructions 19
Operator Controls ................................................19
Ignition Switch ..............................................................19
Engine Throttle .............................................................20
Steering Levers ............................................................20
Forward Speed Control (FSC) ......................................22
Blade Clutch Switch (PTO) ...........................................22
Parking Brake ...............................................................22
Circuit Breaker ..............................................................22
Seat Panel Latch ..........................................................23
Hourmeter.....................................................................23
Transaxle Lockout Arms ...............................................23
Pre-Operation Checklist ......................................24
Starting the Engine ..............................................25
Adjusting Ground Speed and Steering ................25
Engaging the Blades ...........................................27
Recommendations for Getting Started: ...............27
Stopping the Machine ..........................................28
Adjusting the Cutting Height ................................29
Deck Tilt-Up Position ...........................................29
Recommendations for Mowing ............................30
Transaxle Lockout ...............................................32
Recommendations for Tilt-up Deck Operation and
Transport .............................................................33
Maintenance 34
R21 Maintenance Schedule Chart.......................34
Check Engine Crankcase Oil...............................35
Check/Clean Engine Air Cooling System ............36
Clean Grass Buildup Under Deck........................37
Inspect/Service Mower Blades ............................37
Check Security of Air Filtration Components .......39
Check Discharge Shield ......................................39
Lubricate Grease Fittings and Oil Points .............39
Check Tire Pressure ............................................41
Check Drive Belts (Ground Drive, Blade) ............41
Check Safety Switch System...............................41
Clean/Replace Engine Precleaner Air Filter ........42
Replace Engine Air Filter .....................................43
Change Engine Crankcase Oil and Filter ............44
Clean Engine Cooling System .............................45
Replace Fuel Filter ..............................................46
Clean Transaxle Housing and Fans ....................46
Check Drive Tire Mounting Nuts ..........................47
Check Blade Brake Function ...............................47
Replace Spark Plugs and Set Gap ......................47
Check/Adjust Engine Valve Lash .........................47
Check FSC Friction Lock .....................................48
Check Transmission Control Settings..................48
Check Neutral-Park Position ........................................48
Check Straight Ground Tracking ..................................48
Check Fuel Lines and Clamps.............................48
Clean Battery Terminals ......................................49
Long-Term Storage Preparation ..........................49
Mower Preparation for Storage ....................................49
Engine Preparation for Storage ....................................50
Restarting the Mower After Storage .............................50
Service and Adjustments 51
Belt Replacement ................................................51
Replacing the Blade Drive Belt (PTO) ..........................52
Replacing the Ground Drive Belt ..................................53
Deck Leveling ......................................................55
Steering Handle Adjustment ................................56
Forward Speed Control Friction Adjustment ........56
Neutral Function Adjustment ...............................57
Straight Tracking Adjustment ...............................58

Walker R21 Specifications

General

Drive System	Hydrostatic
Cutting Height	1.5 - 4.5 inches
Engine	Kohler CH740
Engine Type	Air-cooled
Cutting Width	52 inch
Wheel Size	20 inches (rear)