ARMY TM 9-6115-670-14&P
4-124
4.49. ACTUATOR SOLENOID.
This task covers:
a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Battery, 24 Volt
(Item 20, Appendix B)
Equipment Conditions
MASTER ON-OFF switch on APU control unit
set to OFF.
Materials/Parts
Actuator/Solenoid
TEST
a. Tag and remove electrical leads from actuator/solenoid leads (2, Figure 4-37).
b. Connect 24 volt battery (1) to actuator/solenoid leads (2).
c. Observe actuator shaft. Shaft should push out 0.775 in. to 0.825 in. (1.969 to 2.096 cm).
d. Remove power. Actuator shaft should return to normal position.
e. If actuator/solenoid does not operate, replace actuator/solenoid.
REPLACE
a. Tag and remove actuator solenoid electrical leads (2) from governor electrical leads.
b. Remove screw (11), lock washer (9), and nut (8) which secures rod end bearing (5) and clevis (10).
c. Separate rod end bearing (5) from clevis (10).
d. Remove clevis (10) from actuator shaft (3).
e. Remove hex stop nut (12) from actuator shaft (3).
f. Remove four bolts (4), washers (7), and nuts (6) securing actuator/solenoid (13) to mounting
bracket and remove actuator/solenoid (13).
g. Place new actuator/solenoid (13) on mounting bracket and secure with four bolts (4), washers (7),
and nuts (6).
h. Install stop nut (12) onto actuator shaft (3) and screw on until nut (12) is completely seated into
threads on shaft (3).
