6 Troubleshooting
6.1 Troubleshooting
Engine does not turn when starter is actuated
Component
Probable cause
Task
Battery
Low or defective
Charge or replace (see manufacturer's
documentation).
Cable connections defective
Check if cable connections are proper‐
ly secured (see manufacturer's docu‐
mentation).
Starter (electric)
Engine wiring or starter defective
Check cable connections for secure
seating,
Contact Service.
Starter (compressed
air)
Cabling on starting valve or starter de‐
fective
Check cable connections for secure
seating,
Contact Service.
Engine wiring
Defective
Check (→ Page 195).
Engine/generator
control system
Secure seating of assemblies or con‐
nectors not provided
Perform visual inspection (see manu‐
facturer's documentation).
Engine Governor
Plug-in connections are loose
Check plug connections (→ Page 197).
Engine
Running gear blocked (engine cannot
be barred manually)
Contact Service.
Engine turns but does not fire
Component
Probable cause
Task
Starter (electric)
Poor rotation by starter: Battery low or
defective
Charge or replace battery (see manu‐
facturer's documentation).
Starter (compressed
air)
Poor rotation by starter: Air pressure
too low
Check compressed air system.
Engine wiring
Defective
Check (→ Page 195).
Fuel system
Not vented
Vent fuel system (→ Page 152).
Engine Governor
Defective
Contact Service.
Engine fires unevenly
Component
Probable cause
Task
Fuel injection equip‐
ment
Injector defective
Replace (→ Page 146).
Engine wiring
Defective
Check (→ Page 195).
Fuel system
Not vented
Vent fuel system (→ Page 152).
Engine Governor
Defective
Contact Service.
M015710/04E 2012-09 | Troubleshooting | 79
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