Troubleshooting - wsm L503 Workshop Manual

L3130 · L3430 · L3830 · L4630 · L5030, WSM

1. TROUBLESHOOTING

Symptom
Engine Does Not
Start
Starter Does Not Run
Engine Revolution Is
Not Smooth
Either White or Blue
Exhaust Gas Is
Observe
Probable Cause
• No fuel
• Air in the fuel system
• Water in the fuel system
• Fuel pipe clogged
• Fuel filter clogged
• Excessively high viscosity of fuel or engine oil
at low temperature
• Fuel with low cetane number
• Fuel leak due to loose injection pipe retaining
nut
• Incorrect injection timing
• Fuel camshaft worn
• Injection nozzle clogged
• Injection pump malfunctioning
• Seizure of crankshaft, camshaft, piston,
cylinder or bearing
• Compression leak from cylinder
• Improper valve timing
• Piston ring and cylinder worn
• Excessive valve clearance
• Battery discharged
• Starter malfunctioning
• Main switch malfunctioning
• Safety switches improperly adjusted or
defective
• Starter relay defective
• Wiring disconnected
• Electronic instrument panel connector
disconnected
• Fuel filter clogged or dirty
• Air cleaner clogged
• Fuel leak due to loose injection pipe retaining
nut
• Injection pump malfunctioning
• Incorrect nozzle injection pressure
• Injection nozzle stuck or clogged
• Governor malfunctioning
• Excessive engine oil
• Piston ring and cylinder worn or stuck
• Incorrect injection timing
• Deficient compression
Replenish fuel
Bleed
Change fuel and
repair or replace fuel
system
Clean
Change
Use the specified fuel
or engine oil
Use the specified fuel
Tighten nut
Adjust
Replace
Clean
Repair or replace
Repair or replace
Replace head
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Correct or replace
timing gear
Replace
Adjust
Charge
Repair or replace
Repair or replace
Repair or replace
Replace
Connect
Connect
Change
Clean or change
Tighten nut
Repair or replace
Adjust
Repair or replace
Repair
Reduce to the
specified level
Repair or replace
Adjust
Adjust top clearance
1-S1
ENGINE
Reference
Solution
Page
G-7, 8
G-34
–
–
G-31
G-7, 8
G-7, 8
1-S29
1-S64
1-S37
–
1-S32
1-S37, S39,
S42
1-S29, S30
1-S36
1-S39
1-S27
G-25
9-S41
9-S33, 34
9-S35
9-S37
–
–
G-31
G-22
1-S29
1-S32
1-S65
1-S29
–
G-7, 8
1-S40
1-S64
1-S28
W1014322
KiSC issued 02, 2007 A