The 3161 governor must be calibrated to engine specifications. When requesting
the correct specifications for your governor, contact Woodward (information on
www.woodward.com). When requesting information for your governor, include
the following information:
· Governor part number
· Governor serial number
General
1. Before placing the governor on the test stand, be sure the governor pump is
assembled for the correct direction of rotation.
2. Install governor on the test stand.
3. Remove governor cover.
4. Set governor droop at zero.
(a) Place dial indicator on the speeder plug.
(b) If the hand on the dial indicator shows movement when moving the
servo from mm. to max. position, readjust the droop slider and position
the servo again. Moving the slider towards the speeder plug decreases
droop, and moving it away increases droop. When zero droop has
been set, tighten nut (12) on the droop slider.
5. Place test cover 8995-072 and terminal lever positioning tool 8995-073 on
the governor.
6. Adjust the output shaft protractor 8995-070 to read zero degrees when the
output shaft is at minimum travel.
7. Fill the governor with 2.2 liters of clean oil with a viscosity of 100–300 SUS
at operating temperature (typically 150–180 °F/66–82 °C).
Calibration
1. With the governor installed on the test stand, rotate the test stand drive (100
to 400 rpm) until the governor output shaft moves to full fuel (40 degrees
minimum).
2. Increase test stand speed and adjust governor speed setting so the
governor controls at 20 degrees output shaft position at 900 rpm.
3. Open the governor needle valve and allow the governor to hunt for a
minimum of 30 seconds. Close the needle valve until the governor is stable.
Record controlling rpm. Turn the valve clockwise until the valve is
completely closed. The controlling rpm should change less than 10 rpm in a
30 second time period.
