John Deere CD4039DF008 - Manual (Page 59)

Maintenance/2000 hours/2 years
DPSG,CD03523,38 –19–13JUL99–1/1
CHECKING ENGINE SPEED
CD30763
–UN–24SEP99
NOTE: Most engines for generator set application
(1500 rpm for 50 Hz or 1800 rpm for 60 Hz) run
only at fast idle and therefore they do not have
slow idle.
Fast idle—Specification
50 Hz Generator set 1550—1580 rpm ........................................................
60 Hz Generator set 1865—1890 rpm ........................................................
NOTE: Fast idle is settled by the factory then the idle
adjusting screw (A) is sealed to prevent from
tampering. Fast idle adjustment can only be done
by an authorized fuel system agent.
DPSG,CD03523,39 –19–13JUL99–1/1
ADJUST SPEED DROOP GOVERNOR
CD30764
–UN–24SEP99
1. Warm engine to normal operating temperature.
2. Run engine at fast idle.
3. Apply full load.
4. If specified power cannot be obtained, turn screw (B)
to adjust droop until the requested power is reached.
NOTE: If surging exists upon removing the load, turn
screw (B) clockwise to eliminate.
40-3
112699
PN=59