WOODWARD PSG GOVERNOR
TESTINGAND ADJUSTING
WOODWARD PSG GOVERNOR
LINKAGE ADJUSTMENT
PSG GOVERNOR CONTROL LINKAGE
1. Lever. 2. Rod assembly. 3. Lever. 4. Governor
output shaft. A. Angle. 8. Angle.
1.
When governor output shaft (4) is in the S H
UTOFF position angle (A), between lever(l) and
vertical, must be 45°.
2.
Keep lever ( ) at S HUTOFF. Adjust rod
assembly (2) so that when it is connected to
lever (3) angle (B), between the lever and
horizontal, is 650 52'.
3.
Check to make sure the linkage operates freely.
NEEDLE VALVE ADJUSTMENT
WOODWARD PSG GOVERNOR
(Typical Illustration)
1. Needle valve. 2. Knurled knob. 3. Synchronizing
motor.
NOTE: The Woodward PSG Governor is removed from
the engine to show the needle valve (I). When the
governor is installed on the engine, the needle
valve (I) is between the governor and the cylinder block.
1.
Start the engine and let it run at normal operating
conditions. Adjust the engine speed with the
knurled knob (2) if necessary to get the engine
running at the normal engine speed.
2.
Turn compensating needle valve (1) two or three
turns counterclockwise. Let the engine hunt for
about 30 seconds. This lets air out of the
hydraulic circuit in the governor.
3.
Turn the needle valve slowly clockwise until the
engine speed has stability. Put a near full load
on the engine. Again turn the needle valve
slowly clockwise until the engine speed has
stability.
NOTE: 1/4 turn out from the seat is the approximate
point of best stability.
4.
Check the action of the governor by moving
lever (4) to the shutoff position as shown. When
the engine speed starts to decrease, release
lever (4). If the governor is operating correctly,
there should be a rapid return to the normal
engine speed with only a small amount of
overshoot (engine runs faster than normal).
WOODWARD PSG GOVERNOR INSTALLED
4. Lever.
5.
If the engine hunts more than a small amount
before it has stability turn the needle sale
clockwise. If the engine is slow to return to the
desired
speed
turn
the
needle
salve
counterclockwise. Do steps 4 and 5 until the
engine returns to the desired speed and has
stability in the shortest amount of time
.
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