Unit Maintenance Troubleshooting
TEST OR INSPECTION
Troubleshooting procedures may require that checks be made while the engine is running. Use
extreme care to prevent contact with high temperature exhaust, electrical or moving parts.
Proper care must be taken to provide efficient ventilation when running the engine indoors;
exhaust gases contain carbon monoxide which is odorless and a deadly poison. Spilling diesel
fuel on or about a hot engine may cause an explosion and serious injury.
During some troubleshooting procedures it may be necessary to run the engine and pump
assembly. Do not run the pump without water in the volute. This will destroy the mechanical
seal, causing pump failure. When necessary to run the pump for longer than a few seconds,
make sure that suction and discharge hoses are installed and a source of water to be pumped is
available. Start engine, prime and operate pump to duplicate normal operation and to prevent
pump from overheating.
ENGINE FAILS TO CRANK OR CRANKS VERY SLOWLY
Check fuse for corrosion or damage.
Replace fuse in control panel (para 2-28).
Check for weak batteries or dirty, corroded, or loose battery cable connections.
Add distilled water as needed. Recharge batteries or replace if defective (para 2-27)
Check for dirty, corroded, or loose cable connections on alternator and starter (para 2-42 and 2-43)
Clean and tighten starter and/or alternator connections if necessary.
Check V-belts for breaks or cracks. Check belt tension.
Tighten or replace V-belts as necessary (para 2-41).
Remove and check starter.
Replace defective starter (para 2-43).
If engine still will not crank, the engine may be seized.
Notify direct support maintenance.