TM 9-4940-568-20
2-61
Table 2-7. Engine Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14. ENGINE RPM WILL NOT REACH RATED SPEED.
Fuel contaminated.
Verify by operating with clean fuel from a temporary tank.
Fuel supply inadequate.
Check the flow through the filters to locate the source of the restriction (Para 8-18 and
8-19).
Fuel pump malfunctioning.
Check/replace fuel pump (Para 8-21).
15. ENGINE POWER OUTPUT LOW.
Fuel contaminated.
Verify by operating with clean fuel from a temporary tank.
High pressure fuel leak.
Inspect/correct leaks in the high pressure lines, fittings and injector sealing washers
(Para 8-20).
Fuel supply restricted
Check fuel lines and hoses for restriction. Clear any obstructions or debris.
Plugged fuel filters.
Replace fuel filters (Para 8-18 and 8-19).
Air in the fuel system.
Bleed the fuel system and check for suction leaks.
Fuel pump malfunctioning.
Check/replace fuel pump (Para 8-21).
Oil level incorrect.
Check/correct oil level (TM 9-4940-568-10).
