TM 9-4940-568-34
5-98
This task covers:
a. Adjustment
b. Follow-On Maintenance
INITIAL SETUP
Equipment Condition
FRS unloaded, (TM 9-4940-568-10)
Remove front panel, (TM 9-4940-568-10)
Tools and Special Tools
Tool Kit, General Mechanic’s
(Item 67, Appendix F)
5-18. FUEL INJECTION PUMP ADJUSTMENT.
a.
Adjustment.
(1)
In the mechanical governor, the output frequency (50 Hz or 60 Hz) can be adjusted by turning the
governor “idle” and “speed” adjusting screws while the engine is running at its normal operating
temperature under full load.
(2)
Adjust droop to within five percent of nominal frequency (3 Hz for 60 Hz sets and 2.5 Hz for 50 Hz sets).
(3)
Check operation under various loads and increase droop if the governor hunts.
(4)
Readjust full-load frequency if droop is adjusted.
b.
Follow-On Maintenance:
Adjust electronic overspeed module, (TM 9-4940-568-20).
END OF TASK
