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TP-5695 12/933-22 Scheduled Maintenance
Governor
The gear-driven centrifugal type governor serves to
keep engine speed constant by automatically adjusting
the amount of fuel supplied to the engine according to
changes in load.
Lubrication
Lubricate governor linkage at the specified interval
using white lithium grease or lubriplate.
Governor Adjustment
The gear-driven centrifugal type governor serves to
keep engine speed constant by automatically adjusting
the amount of fuel supplied to the engine according to
changes in load. No regular service is required on the
unit. The governor is adjusted during run-in at the
factory and further adjustment should not be needed
unless greatly varying load conditions are encountered
or if poor governor control develops after extended
usage. See Figure 3-25 for correct placement of
governor linkage (models may vary).
60 Hz generator sets are designed to operate at 60-63
Hz, 3600 rpm under full load and 3780 rpm under no
load. 50 Hz generator sets are designed to operate at
50--52.5 Hz, 3000 rpm under full load and 3150 rpm
under no load. Tocheck speed, use hand tachometer or
frequency meter. Use the following procedure to adjust
governor.
1. Loosen governor arm locking nut. See
Figure 3-24.
2. Move the governor arm end fully in the direction
shown (toward the electric choke solenoid) and
readjust governor screw. Tighten locking nut.
3. Start engine and run to reach operating
temperature.
4. Apply full load and turn engine speed adjustment
screw to 3600 rpm for 60 Hz generator set, 3000
rpm for 50 Hz set.
5. Check regulation by applying and removing full
load.
6. STOP generator set.
1
2
1. Mixture Screw
2. Idle Speed Screw
3. Governor Adjustment
1-829
3
Figure 3-24. Governor Adjustment
Carburetor
Governor
Adjustment
Screw
Throttle Rod/Spring
Governor Spring
Governor Cross Shaft
Governor Rod
Outer Hole
Hole Nearest
to Pivot Point
Pivot Point
Locknut
Figure 3-25. Governor Linkage