TM 55-2815-574-24
0021
ELECTRONIC GOVERNOR ACTUATOR STAYS AT MINIMUM POSITION WHEN POWER IS APPLIED -
Continued
MALFUNCTION
Interruption or weak Direct Current (DC) power supply.
CORRECTIVE ACTION
1.
With DC power supply off, place an insulated jumper between terminals 2 and 3 (TP1 & TP2).
Turn DC power on. Actuator should go to full stroke. DC voltage at terminals 4 and 5 should be
within three volts of the supply. If actuator does not move to full stroke, continue with
steps below.
2.
Perform operational check of electronic governor actuator (TM 55-1925-205-10).
MALFUNCTION
Actuator coil is open or shorted.
CORRECTIVE ACTION
1.
If actuator is open or shorted to case, replace actuator (WP 0098). If governor still does not
operate, continue with steps below.
2.
Perform operational check of the electronic governor actuator (TM 55-1925-205-10).
3.
Using a multimeter, measure resistance of actuator coil. Coil resistance should be within 2.3
ohms + /- 0.2 ohms. If resistance is not within factory limits, replace actuator (WP 0098).
4.
Perform operational check of the electronic governor actuator (TM 55-1925-205-10).
MALFUNCTION
Resistance of coil lead to actuator case is improper.
CORRECTIVE ACTION
1.
Using a multimeter, measure resistance of each coil lead to the actuator case. An open circuit is
indicated by a low scale reading on the ohm meter. If continuity is detected,
replace actuator (WP 0098).
2.
Perform operational check of the electronic governor actuator (TM 55-1925-205-10).
MALFUNCTION
Incorrect voltage between terminal 6 and terminal 2.
CORRECTIVE ACTION
1.
With DC power to the governor on and engine off, measure DC voltage from terminal 6 (+) to
terminal 2 (-). It should be approximately 8 VDC. If 8 VDC is not present,
replace controller (WP 0099).
2.
Perform operational check of electronic governor actuator (TM 55-1925-205-10).
0021-3