TM 10-4320-307-24
3-13
GOVERNOR CONTROL INSPECT/TEST/REPLACE.
This task covers: a. Removal/Installation b. Inspection c. Test
INITIAL SETUP
Test Equipment
Tools
Multimeter (Item 12, Appendix B)
Tool kit, general mechanics (Item 1, Appendix B)
REMOVAL/INSTALLATION:
The governor control is removed and installed in accordance with paragraph 2-29.
INSPECTION:
Inspect governor control for evidence of burning or other damage.
TEST:
1.
Using multimeter, check supply voltage between terminals 1 and 2 of the governor control supply. Voltage should
be +24 Vdc. If supply voltage is not present, check wiring.
2.
With MODE CONTROL switch positioned in MANUAL, using multimeter, check voltage between terminals 8 and 9
of the governor control. Voltage shall increase from 0 to +1 Vdc as ENGINE/PUMP CONTROLLER knob is
rotated from minimum to maximum. If voltage is not as stated, replace governor control.
3.
Start engine in accordance with TM 10-4320-307-10 and allow engine to idle.
4.
Using multimeter, check voltage between terminals 5 and 6 of the governor control. Voltage should be 11 Vac. If
voltage is not 11 Vac, verify magnetic pickup on flywheel housing is mounted correctly. If magnetic pickup is
mounted correctly, verify resistance between magnetic pickup terminals is approximately 300 ohms. If magnetic
pickup is mounted correctly and resistance is as stated, replace governor control.
5.
Stop engine in accordance with TM 10-4320-307-10. Using voltmeter, check voltage between governor control
terminals 3 and 4. Voltage should be 0. Start engine in accordance with TM 10-4320-307-10 and using
multimeter, verify voltage between governor control terminals 3 and 4. Voltage should be between + 10 and +12
Vdc. If voltages are not as stated, replace governor control.
6.
Disconnect wires from fuel pump actuator. Using multimeter, verify resistance between terminals is between 6.8
and 7.5 ohms. If resistance is as stated, replace governor control.
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