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 WOODWARD UG8 LEVER GOVERNOR
TESTING AND ADJUSTING
WOODWARD UG8 LEVER GOVERNOR
6.
Slowly turn the needle valve in a clockwise
COMPENSATING ADJUSTMENT
direction until the engine surge just stops.
Although the governor may appear to be
7.
Now check the number of turns the needle valve
operating satisfactorily at no load, high overspeeds and
is open. To find the number of turns the needle
underspeeds after load changes and slow return to
valve is open, close the valve completely and
normal speed are the results of incorrect compensation
make a note of the number of turns needed to
adjustments.
close the valve.
After the temperature of the engine and the oil in
8.
Open the needle valve to the same position at
the governor have reached normal operating values,
which the engine did not surge (Step 6).
make compensation adjustments with the engine running
at no load conditions.
9.
Move the governor linkage to change the engine
speed. If the engine does not surge, and the
needle valve is 1/2 to 3/4 of a turn open, the
governor adjustment is correct. Install plug (3) in
the base. If the needle valve is more than 3/4 of
a turn open, do the steps that follow.
10.
Loosen nut (2) and move compensation pointer
(1) up two marks on the pointer scale.
11.
Turn the needle valve three to five turns in a
counterclockwise direction.
12.
Let the engine surge for approximately 30
seconds to help remove air from the governor oil
passages.
13.
Slowly turn the needle valve in a clockwise
direction until the engine surge just stops.
14.
Now check the number of turns the needle valve
UG8 LEVER GOVERNOR
is open. To find the number of turns the needle
1. Compensation pointer. 2. Nut. 3. Plug.
valve is open, close the valve completely and
make a note of the number of turns needed to
1.
Loosen nut (2) that holds compensation pointer
close the valve.
(1) and move the pointer up as far as it will go.
Tighten the nut.
15.
Open the needle valve to the same position at
which the engine did not surge (Step 13).
2.
Remove plug (3) from the base of the governor
to get access to the needle valve.
16.
Move the governor linkage to change the engine
speed. If the engine does not surge, and the
3.
Use a screwdriver and turn the needle valve
needle valve is 1/2 to 3/4 of a turn open, the
three to five turns in a counterclockwise (open)
governor adjustment is correct. Install plug (3) in
direction. Make sure the screwdriver engages
the base. If the needle valve is more than 3/4 of
with the shallow slot of the compensating needle
a turn open, do Steps 10 thru 16 again.
valve and not in the deep slot that is at right
angles to the shallow screwdriver slot.
A needle valve that is opened less than 1/2 turn
will cause a slow return of the engine to normal speed
4.
Let the engine surge for approximately 30
after a load change.
seconds to help remove air from the governor oil
passages.
If the compensation pointer is too far toward the
maximum position, the engine speed change will be too
5.
Loosen nut (2) that holds compensation pointer
great when the load changes.
(1) and move the pointer down as far as it will
go. Tighten the nut.
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