1-S1
L3130 · L3430 · L3830 · L4630 · L5030, WSM
ENGINE
1. TROUBLESHOOTING
W1014322
Symptom Probable Cause Solution
Reference
Page
Engine Does Not
Start
• 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
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
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
Starter Does Not Run • Battery discharged
• Starter malfunctioning
• Main switch malfunctioning
• Safety switches improperly adjusted or
defective
• Starter relay defective
• Wiring disconnected
• Electronic instrument panel connector
disconnected
Charge
Repair or replace
Repair or replace
Repair or replace
Replace
Connect
Connect
G-25
9-S41
9-S33, 34
9-S35
9-S37
–
–
Engine Revolution Is
Not Smooth
• 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
Change
Clean or change
Tighten nut
Repair or replace
Adjust
Repair or replace
Repair
G-31
G-22
1-S29
1-S32
1-S65
1-S29
–
Either White or Blue
Exhaust Gas Is
Observe
• Excessive engine oil
• Piston ring and cylinder worn or stuck
• Incorrect injection timing
• Deficient compression
Reduce to the
specified level
Repair or replace
Adjust
Adjust top clearance
G-7, 8
1-S40
1-S64
1-S28
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