ARMY TM 9-6115-671-14
AIR FORCE TO 35C2-3-446-32
MARINE CORPS TM 09249A/09246A-14
4-188
4.12.6 AC Circuit Interrupter K1.
a. Inspection.
(1)
Shut down generator set, paragraph 2.11.2.
(2)
Open output box access door (Figure 1-2).
(3)
Inspect AC circuit interrupter (17, Figure 4-28) for security, cracked housing, broken wire terminals,
and loose or missing hardware.
(4)
Close output box access door.
b. Testing.
(1)
Shut down generator set, paragraph 2.11.2.
(2)
Open BATTERY ACCESS door (Figure 1-2), and disconnect negative battery cable.
(3)
Open output box access door (Figure 1-2).
(4)
Set multimeter for ohms, and check for open circuits between AC circuit interrupter (17, Figure 4-
28) terminals A1 and A2, B1 and B2, C1 and C2, and 11 and 12.
(5)
Connect jumper wire from cranking relay (20) terminal A1 to AC circuit interrupter (17) terminal X.
(6)
Connect negative battery cable to battery.
(7)
Check for closed circuits (continuity) between AC circuit interrupter (17) terminals A1 and A2, B1
and B2, C1 and C2, and 11 and 12.
(8)
Disconnect negative battery cable.
(9)
Replace AC circuit interrupter if indications are other than as specified above.
(10) If replacement is not necessary, remove jumper wire from terminal A1 of cranking relay (20) to
terminal X of AC circuit interrupter (17).
(11) Close output box access door.
(12) Connect negative battery cable to battery, and close BATTERY ACCESS door.
c. Replacement.
(1)
Shut down generator set, paragraph 2.11.2.
(2)
Open BATTERY ACCESS door (Figure 1-2), and disconnect negative battery cable.
(3)
Open output box and load terminal board access doors (Figure 1-2).
(4)
Remove rear panel. Refer to paragraph 4.7.5.
(5)
Remove screws (12, Figure 4-28), washers (13), and cover (14) from AC circuit interrupter (17).
