TP-5592 7/96 Scheduled Maintenance 3-13
Governor
The centrifugal, mechanical governor keeps engine
speed constant by automatically adjusting the amount
of fuel supplied to the engine according to changes in
theload. Thegovernorrequiresnoregularservice. The
governorisadjustedduringrun-inatthefactory. Further
adjustments are unnecessary except under greatly
varying load conditions or if poor governor control
develops after extended usage.
60 Hz generator sets are designedto operate at57-63
Hz, 1800 RPM under full load and 1890 RPM under no
load.
50 Hz generator sets are designedto operate at47-53
Hz, 1500 RPM under full load and 1590 RPM under no
load.
To checkspeed,usefrequencymeterconnectedtoload
leads or use hand tachometer.
1. Loosen locking nut on speed adjusting screw.
2. Toincreasespeed (and frequency), turn screw in a
clockwise direction. Turn screw counterclockwise
to decrease speed.
3. Tighten locking nut at new setting. See
Figure 3-11.
1
2
TP-5592-3
1. Speed adjusting screw
2. Locking nut
Figure 3-11. Governor (Typical)
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