TP-6161 1/12
TP-6161 1/12 41Section 4 Troubleshooting
Section or
Publication
Reference*
Recommended ActionsProbable Causes
Trouble Symptoms
Section or
Publication
Reference*
Recommended ActionsProbable Causes
Excessive or
abnormal noise
High fuel
consumption
Low oil
pressure
Overheats
Lacks power
Stops
suddenly
No or low
output voltage
Starts hard
Cranks but
does not start
Does not
crank
x
High exhaust temperature switch
inoperative
Replace the inoperative switch. Gen. S/M or W/D
Engine
x Engine ECM Troubleshoot engine ECM and electrical. Eng. S/M, W/D
x x x x Air cleaner clogged Clean or replace the filter element. Eng. O/M
x x x x x Compression weak
Check the compression.[
Eng. S/M
x x x x x
Engine overload Reduce the electrical load. See the generator set spec sheet for
wattage specifications.
S/S
x
Exhaust system leak Inspect the exhaust system. Replace the inoperative exhaust
system components.[
I/M
x
Exhaust system not securely installed Inspect the exhaust system. Tighten the loose exhaust system
components.[
I/M
x x x x Governor inoperative
Adjust the governor.[
Gen. S/M
x x Valve clearance incorrect
Adjust the valves.[
Eng. S/M
x Vibration excessive Tighten all loose hardware. —
x x x
Ignition system inoperative
(gas/gasoline only)
Check the ignition system (spark plugs, spark plug wires, etc.). Eng. O/M
Fuel System
x x x Air in fuel system (diesel only) Bleed the diesel fuel system. Eng. O/M
x x
Ether canister empty or system
inoperative, if equipped (diesel only)
Replace or repair the ether starting system. Eng. O/M
x x Fuel tank empty or fuel valve shut off Add fuel and move the fuel valve to the ON position. —
x x x
Fuel feed or injection pump
inoperative (diesel only)
Rebuild or replace the injection pump.[
Eng. S/M
x x x
Fuel or fuel injectors dirty or faulty
(diesel only)
Clean, test, and/or replace the inoperative fuel injector.[
Eng. S/M
x x x x Fuel filter restriction Clean or replace the fuel filter. Eng. O/M
x Fuel solenoid inoperative
Troubleshoot the fuel solenoid.[
Eng. S/M
x x Fuel pressure insufficient (gas only)
Check the fuel supply and valves.[
S/S, Gen. O/M
x x x x
Fuel injection timing out of
adjustment (diesel only)
Adjust the fuel injection timing.[
Eng. S/M
* Sec./Section—numbered section of this manual; ATS—Automatic Transfer Switch; Eng.—Engine; Gen.—Generator Set; I/M—Installation Manual; O/M—Operation Manual; S/M—Service
Manual; S/S—Spec Sheet; W/D—Wiring Diagram Manual
[ Have an authorized service distributor/dealer perform this service.
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