ENGINE
B1220, B1620, B1820, WSM
1-S1
(EU)
1. TROUBLESHOOTING
Symptom Probable Cause Solution
Reference
Page
Engine Does Not
Start
No fuel Replenish fuel G-9
Air in the fuel system Bleed G-36
Water in the fuel system Change fuel and
repair or replace fuel
system
–
Fuel hose clogged Clean –
Fuel filter clogged Clean or replace G-26, G-31
Excessively high viscosity of fuel or engine oil at
low temperature
Use specified fuel or
engine oil
G-9
Fuel with low cetane number Use specified fuel –
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut 1-S26
Incorrect injection timing Adjust 1-S15
Fuel camshaft worn Replace 1-S33
Injection nozzle clogged Clean or replace 1-S18
Injection pump malfunctioning Repair or replace 1-S31
Seizure of crankshaft, camshaft, piston, cylinder
or bearing
Repair or replace 1-S34,
1-S37,
1-S38
Compression leak from cylinder Replace head gasket,
tighten cylinder head
screw, glow plug and
nozzle holder
1-S10
Improper valve timing Correct or replace
timing gear
1-S32
Piston ring and cylinder worn Replace 1-S35
Excessive valve clearance Adjust 1-S11
Stop solenoid malfunctioning Replace –
Starter Does Not Run Battery discharged Charge G-23
Starter malfunctioning Repair or replace 9-S26
Wiring disconnected Connect –
Engine Revolution Is
Not Smooth
Fuel filter clogged or dirty Clean or replace G-26, G-31
Air cleaner clogged Clean or replace G-25, G-26
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut 1-S26
Injection pump malfunctioning Repair or replace 1-S31
Incorrect nozzle injection pressure Adjust 1-S17
Injection nozzle stuck or clogged Repair or replace 1-S18
Governor malfunctioning Repair 1-S33
Either White or Blue
Exhaust Gas Is
Observed
Excessive engine oil Reduce to specified
level
G-9
Piston ring and cylinder worn or stuck Repair or replace 1-S35
Incorrect injection timing Adjust 1-S15
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