Kubota W5021-T User Manual

CONTENTS
SPECIFICATIONS----------1
DIMENSIONS 13
M. MECHANISM
1.ENGINE------------ M-1
2. TRANSMISSION
[1] AUTOMATIC PRESSURE
(EXCEPT -P, -PC, -PCC) M-5
RELIEVING MECHANISM ....................... M-l [1] POWER TRAIN ...................................... M·5
[2]
CARBURETOR ........................................ M-3
3. MOWER
BLADE CLUTCH
[3]
SUB PTO SHAFT
(EXCEPT .p, .T) --------- M-9
(Except
-P, -PC, -PCC) ·· ..........······ .. ···· .... ·M-3
G. GENERAL DISASSEMB~: NG ::~~~:~::~::::::i::CE)um.muu.u.~·:! '= S.
[1] IDENTIFICATION ······································5-1
,[2]
GENERAL SAFETy··································· 5-1
[3] GENERAL PRECAUTION .......................... 5-3 [3] FUEl SYSTEM ........................................ 5-91
[4] LUBRICANTS AND FUEL.······ ...... ·············S-3
[5]
TROUBLESHOOTING ································S-5
[6]
SERVICING SPECIFICATIONS··················S-ll
[7] TIGHTENING
TORQUES ......................... S-24
(1) Tightening Torques for Important (1) Carburetor ........................................ S-93
S-95
Screws, Bolts and Nuts ...................... S-24 [4] IGNITION SYSTEM ................................
(2)
Tightening Torques for General
Use Screws, Bolts and Nuts ................ S-24 (1) Spark PI ug ......................................... 5-95
[8] MAINTENANCE
CHECK LIST ................. S-27 (2) Ignition Unit ..................................... S-95
[9] CHECK AND MAINTENANCE ................ S-29 (3) Stop Switch ....................................... S-97
(1) Check Points of Each Use
or Daily·· .. ·.···· .. ······............................ S-29 CHECKING .. ···........· ...... · .. ···....· .... ··· .. · .. · .... S-99
(2) Check Points of First Month
or Initial 20 Hours ............................. S-33
(3) Check Points of Every 3 Months [6] CHARGING SYSTEM ····· .. · ...... ··· .. ··· .. · .... S-103
or 50 Hours ........................................ S-35
(4) Check Points of Every 6 Months
or 100 Hours ...................................... S-35 DISASSEMBLING AND ASSEMBLING .. · .. S-105
(5) Check Points of Every Year SERVICING ... ············ ...... ··· .... ············ ...... S-105
or 300 Hours ...................................... S-41
[10]
SPECIAL TOOLS ·· ...... ···· ...... ·· .. ·········· .... ·5-43 (EXCEPT -P, -PC, -PCC) S-111
1.
DISASSEMBLING AND ASSEMBLING .... ···S-47 [2] TRANSMISSION ................................... S-113
[2] ENGINE BODY ·.·· ...... ··· .... ·· .. ······· ....···.... ·S-51
CHECKING AND ADJUSTING ····.......... ·· .. ·S-51 SERVICING ............................................. S-115
DISASSEMBLING AND ASSEMBLING ....· .. S-51
(1) External Components ....................... S-51
(2) Cylinder Head and Valves ................. S-59 SERVICING ............................................. S-125
(3) Camshaft, Piston and Crankshaft ...... S-61
SERVICING ............................................... S-71
(1) Valves··· .... · .... ···........ ·· ..........· .... · .. · .... S-71
(2) Cylinder liner .................................... S-77
(4) Connecting Rod, Crankshaft and .:.
Camshaft···········································5-83 ~
CHECKING AND ADJUSTING ···················S-91 .:.
(1) Governor ........................................... S-91 ~
(2) ChokeRod· ............ ··········· ... ···· ...... ··.·S·91
DISASSEMBLING AND ASSEMBLING ·······S-93
CHECKING AND ADJUSTING ···················5-95
[5]
STARTING SYSTEM ········ .. ······················S-99
DISASSEMBLING AND ASSEMBLING ·· .. ·S-101
SERVICING ............................................. S-l 01
CHECKING ...... · .................. · .. · .. ·· .. · .......... S-l 03
2. MOWER BLADE CLUTCH AND BLADE - S-105
3. TRANSMISSION
ENGINE S-47
[1] SEPARATING ENGINE ·······........ · .... · .. ·· .. ·5-47
[1] SEPARATING TRANSMISSION ....····...... S-lll
DISASSEMBLING AND ASSEMBLING ·.... S-111
DISASSEMBLING AND ASSEMBLING .... ·S-l13
4.
FRONT WHEEL AND REAR WHEEL--S-121
DISASSEMBLING AND ASSEIVIBLING ·· .. ·S-121
5. HANDLE AND DISCHARGE GUARD --S-129
CHECKING AND ADJUSTING .......... ·· .. ···S-129
DISASSEMBLING AND ASSEMBLING .... ·S-129

Kubota W5021-T Specifications

General

Brand	Kubota
Model	W5021-T
Category	Lawn Mower
Language	English

Summary

M. MECHANISM

1. ENGINE

Details of the engine.

2. TRANSMISSION

Details of the transmission system.

3. MOWER BLADE CLUTCH

Information on the mower blade clutch.

S. DISASSEMBLING AND SERVICING

M.1 ENGINE

[1] AUTOMATIC PRESSURE RELIEVING MECHANISM

Mechanism for reducing starting compression.

[2] CARBURETOR

Carburetor operation and checking.

M.2 TRANSMISSION

[1] POWER TRAIN

Transmission gears and shafts for power transfer.

M.3 MOWER BLADE CLUTCH

S.G GENERAL

[5] TROUBLESHOOTING

Troubleshooting guide for engine and mower operation issues.

[6] SERVICING SPECIFICATIONS

Detailed service specifications for engine components.

[7] TIGHTENING TORQUES

Torque specifications for important screws, bolts, and nuts.

[8] MAINTENANCE CHECK LIST

Checklist for periodic inspection and maintenance.

[9] CHECK AND MAINTENANCE

Points to check for each use or daily.

Checking Mower Blade

Procedure for checking the mower blade condition.

Adjusting Mower Blade Clutch Lever (Except -P, -T)

Adjusting the mower blade clutch lever.

[2] GENERAL SAFETY

Essential safety precautions before servicing.

[4] LUBRICANTS AND FUEL

Recommended lubricants and fuel specifications.

Retightening Blade Mounting Screw

Procedure for retightening blade mounting screws.

S.1 ENGINE

[1] SEPARATING ENGINE

Procedures for separating the engine.

[2] ENGINE BODY

Engine body checks and adjustments.

Carburetor and Governor lever

Disassembly and adjustment of carburetor and governor lever.

Connecting Rod Cap

Connecting rod cap removal and installation.

Piston and Connecting Rod

Piston and connecting rod assembly and disassembly.

Piston Ring and Piston Pin

Piston ring and piston pin removal and installation.

(1) Valves

Valve clearance measurement and adjustment.

(2) Cylinder Liner

Cylinder liner measurement and correction.

Correcting Cylinder Liner

Procedure for correcting cylinder liner wear.

Piston Pin Hole I.D.

Measuring piston pin hole ID.

Clearance between Piston Ring and Ring Groove

Measuring clearance between piston ring and groove.

Correcting Crank Pin

Procedure for correcting crank pin wear.

Cam Heights of Intake and Exhaust

Measuring cam heights for intake and exhaust valves.

[3] FUEL SYSTEM

Checking and adjusting the fuel system components.

[4] IGNITION SYSTEM

[5] STARTING SYSTEM

Valve Clearance

Checking and adjusting valve clearance.

Crankshaft and Governor Lever Shaft

Crankshaft and governor lever shaft removal.

(3) Piston and Piston Ring

Piston skirt OD measurement and piston replacement.

Piston Pin O.D.

Measuring piston pin OD.

Piston Ring Gap

Measuring piston ring gap.

Side Clearance of Connecting Rod on Crank Pin

Measuring connecting rod side clearance on crank pin.

(1) Governor

Adjusting governor and maximum no-load speed.

(1) Carburetor

Carburetor disassembly and reassembly.

(1) Spark Plug

Starting Switch

Starter

Separating Engine

Procedure for separating the engine.

Cylinder Head

Cylinder head removal and gasket replacement.

Piston Ring Thickness

Measuring piston ring thickness.

S.2 MOWER BLADE CLUTCH AND BLADE

S.3 TRANSMISSION

[1] SEPARATING TRANSMISSION

[2] TRANSMISSION

Separating Transmission

S.5 HANDLE AND DISCHARGE GUARD

Adjusting Throttle Lever

Adjusting the throttle lever.

Adjusting Mower Blade Clutch Lever

Adjusting Drive Clutch Lever (Except -P, -PC, -PCC)

Adjusting drive clutch lever for specific models.