TP-6053 7/04 17Section 4 Fuel System
4.7 Governor
The centrifugal, mechanical governor keeps the engine
speed constant by automatically adjusting the amount
of fuel supplied to the engine according to changes in
the load. No regular service is required on the governor.
The factory adjusts the governor during run-in, and
further adjustment should not be needed unless poor
governor control develops after extended generator
usage.
60 Hz generator sets are designed to operate at
57--63 Hz, 1800 rpm under full load and 1890 rpm under
no load.
50 Hz generator sets are designed to operate at
47--53 Hz, 1500 rpm under full load and 1590 rpm under
no load.
Check the engine speed using a frequency meter
connected to the load leads. Loosen the locking nut on
the speed adjusting screw. Turn the screw clockwise to
increase the speed and frequency. Turn the screw
counterclockwise to decrease the speed. Tighten the
locknut at the new setting. See Figure 4-8 or Figure 4-9.
DK-250000B-D
12
1. Locknut
2. Speed adjusting screw
Figure 4-8 Governor, 5EOZ/4EFOZ
ED-250000A-N
1
2
1. Locknut
2. Speed adjusting screw
Figure 4-9 Governor, 8/9/10EOZ and 6.5/8/9EFOZ
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