Manual 03108
3161 Air Pressure Fuel Limiter
Woodward
11
Figure 3-3. Fuel Limit Level and Range
3.
Turn the arming adjustment screw counterclockwise until the output shaft
suddenly drops towards minimum fuel. The governor is now armed. (If the
governor is to be armed at all times, add two additional turns
counterclockwise and go to step 7).
4.
Reduce limiter arming air pressure to 0. Reduce the speed of the governor
to 0. Wait one minute for governor oil pressure to bleed down.
5.
To recheck arming point of the limiter:
a.
Adjust the test stand to run the governor drive shaft at 500 rpm less
than the designated high speed of the governor.
b.
Set the output shaft at 38 degrees travel with the limit level adjustment.
c.
Apply specified arming air pressure to the limiter.
(a)
If the limiter arms (output shaft position drops quickly to a lower
level) at less than specified minimum limit. turn the arming adjustment
screw clockwise and repeat steps 4 and 5.
(b)
It the limiter arms at more than specified maximum limit, turn the
arming adjustment screw counterclockwise and repeat steps 4 and 5.
6.
Reduce limiter air pressure to 0. With the speed setting shaft at the
maximum speed setting, run the governor at 500 rpm less than high speed.
Turn the fuel limit level adjustment screw (Figure 3-3) to set the output shaft
position at the specified degree of travel for 0 pressure.
7.
Apply the specified maximum air pressure to the fuel limiter. If the governor
output shaft rotates to a position that is higher than specified for that air
pressure, reduce the test stand speed to 0. Wait one minute for the
governor oil pressure to bleed down before removing the governor cover.
To prevent hot oil from spraying over the work area, do not remove
the governor cover until the governor oil pressure has dropped to 0.
Remove the governor cover. Loosen the 7/16 hex head screw and move the
limiter cam (range adjustment) towards the front of the governor. Retighten the
screw. INSTALL THE GOVERNOR COVER and repeat steps 6 and 7.
