Troubleshooting - JLG E450A Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Troubleshooting

Flash Code
-
1-1
1-2
1-3
1-4
1-5
2-1
2-2
2-4
3-72
Table 3-7. Troubleshooting
Problem
Unit Off / Disabled (engine will not crank) Check position of selector switch.
Low Oil Pressure
High Engine Temp.
Overspeed
Underspeed
Overcrank
No Speed Signal
Overvoltage
Engine Starting System fault
Loss Of Voltage Sense
Verify that the inhibit run is released.
Check the warning LED. Remedy fault if present and restart the RBS.
Check the start battery voltage.
Check control fuse.
Check for loose wiring or connection.
Check oil level.
Check oil supply lines.
Refer to Kubota Workshop manual WSM OC60/80/95.
Verify correct operation of oil pressure switch with a test gauge.
Check for obstructions in the cooling airflow to the engine.
Check that the ambient temperature is within the design limits of the engine.
Verify correct operation of engine temperature sensor.
Verify setting of governor lever. Readjust, if required.
Refer to Kubota Workshop manual WSM OC60/80/95.
Ensure there is an adequate supply of fuel to the engine.
Ensure there is an adequate supply of combustion air to the engine. Check air cleaner.
Verify setting of governor lever. Readjust if required.
Refer to Kubota OC60 Engine Manual.
Check fuel level.
Check fuel connections.
Verify operation of fuel solenoid and fuel pump.
Check the start battery voltage.
If the engine exhaust contains white smoke then fuel is entering the engine but the engine is not
firing. Refer to the Kubota OC60 Engine Manual for further checks.
If the ambient temperature is low, verify that the heater and/or glow plug are operating.
Check wiring connections.
Check alternator output voltage.
Check engine start battery charging system for current output.
Check for failed engine start battery.
Solution
3121714