General Troubleshooting 4-5TP-5606 6/02
Problem Possible Cause Corrective Action Reference
Hard starting Stale or bad fuel Replace
Air in fuel system Bleed air Section 3. Fuel System
Water, dirt in fuel Drain fuel system
system and/or replace fuel filters
Dirty or faulty injectors Check injectors Engine Service Manual
Improper type of fuel Use proper type of fuel; Section 3. Fuel System
consult fuel supplier
Air cleaner clogged Clean or replace Section 3. Service Air
element Cleaner
Worn piston rings, Check compression Engine Service Manual
valves, etc. and oil consumption
Improper cooling Inspect cooling system Section 3. Cooling System
(hot engine only)
Defective air heater Check/replace air heater Engine Service Manual
Defective C1 relay Check/replace C1 relay Section 7. Engine/Generator
Components
Generator No fuel in tank Replenish
set shuts
down by Fuel line restriction Inspect fuel lines and
itself tank
Clogged fuel filter Replace filter Section 3. Fuel System
Defective fuel Check fuel pump Engine Service Manual
pump NOTE:
Fuel pump is polarity
sensitive and will fail
if the lead connections
are made in reverse.
Air in fuel system Bleed air Section 3. Fuel System
Engine overloaded Reduce electrical load Section 3. Wattage
Requirements
Engine overheated Check air intake, Section 3. Scheduled
(hot engine only) governor adjustment, Maintenance
oil level, etc. Engine Service Manual
Loss of generator Check AC voltage at Section 9. Wiring Diagrams
output voltage to K1 B1/B2 winding
relay (LED1 not lit) Check continuity of Section 7. Stator
B1/B2 stator leads
Air cleaner clogged Clean or replace Section 3. Servicing Air
element Cleaner
Problem Possible Cause Corrective Action Reference