ENGINE
L3560, L4060, L4760, L5060, L5460, L6060, WSM
1-S1
1. TROUBLESHOOTING
Symptom Probable Cause Solution
Reference
Page
Engine Does Not
Start
No fuel Fill fuel G-9
Air in the fuel system Bleed G-44
Water in the fuel system Change fuel and
repair or replace fuel
system
–
Fuel pipe or hose clogged Clean –
Fuel filter clogged Replace G-32
Excessively high viscosity of fuel at low
temperature
Use the specified fuel
or engine oil
G-9
Fuel with low cetane number Use the specified fuel G-9
Fuel leak due to loose injection pipe retaining nut Tighten nut 1-S54
Injector stuck or clogged Replace 1-S57
Fuel supply pump malfunctioning Replace 1-S62
Seizure of crankshaft, camshaft, piston or
bearing
Repair or replace 1-S65,
1-S67,
1-S74
Compression leak from cylinder Replace head gasket,
tighten cylinder head
screw, glow plug and
nozzle holder
1-S56,
1-S57,
1-S59
Improper valve timing Correct or replace
timing gear
1-S64
Piston ring and cylinder worn out Replace 1-S86,
1-S92
Incorrect valve clearance Adjust 1-S13
Starter Does Not Run Battery discharged Charge G-27
Starter malfunctioning Repair or replace 9-S94
Main switch malfunctioning Repair or replace 9-S60,
9-S61
Safety switches improperly adjusted or damaged Adjust or replace 9-S62
Starter relay damaged Replace 9-S66
Wiring disconnected Connect –
Engine Revolution Is
Not Smooth
Fuel filter clogged or dirty Change G-32
Air cleaner clogged Clean or change G-28
Fuel leak due to loose injection pipe retaining nut Tighten nut 1-S54
Fuel supply pump malfunctioning Replace 1-S62
Injector stuck or clogged Replace 1-S57
Turbocharger bearing worn out Replace turbocharger
assembly
1-S53
Turbocharger shaft bent Replace turbocharger
assembly
1-S53
Turbocharger fin or component parts damaged Replace turbocharger
assembly
1-S53
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