4-8 General Troubleshooting TP-5648 8/93
Will not Defective injection Check injection pump Engine Service Manual
carry load pump
or runs
rough Improper lube oil Use proper viscosity Section 3. Lubrication
(cont’d.) oil System
Problem Possible Cause Corrective Action Reference
Lacks power Governor not properly Check engine speed Section 3. Governor
adjusted or defective using frequency meter
(Engine not operating or tachometer.
at rated RPM)
NOTE: For 60 Hz--1800 RPM
For 50 Hz--1500 RPM
Air cleaner clogged Clean or replace Section 3. Air Cleaner
element Service
Improper cooling Inspect cooling system Section 3. Cooling System
Engine overloaded Reduce electrical load Section 3. Wattage
Requirements
Stale or bad fuel Replace
Fuel line restriction Check fuel lines and
tank
Dirty fuel filter Replace fuel filter Section 3. Fuel System
Incorrect injection timing Adjust injection timing Engine Service Manual
Uneven fuel injection Repair/replace injectors Engine Service Manual
and/or injection pump
Compression leak Replace head gasket. Engine Service Manual
Tighten cylinder head
bolt, glow plug, and
nozzle holder
Problem Possible Cause Corrective Action Reference
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