TM 10-4610-232-12
4-76. METAL OXIDE VARISTOR (MOV) JUNCTION BOX. This task covers:
a. Removal.
b. Disassembly.
c. Repair.
d. Reassembly.
e. Installation.
INITIAL SETUP.
Tools, see Appx B, Sec Ill, Ref Code (No,):
Personnel Required: 2
Tool Kit, General Mechanics Automotive (1)
Wire Stripper (16)
Crimper, Hand Terminal (16)
Materials/Parts:
Suitable Tags
Equipment Condition:
ROWPU shutdown.
Main Circuit Breaker CB1 turned off (73, Figure 2-4).
General Safety Instructions:
Varnish, Electrical (Appx E, Sec II, Item 73)
WARNING
Lockwashers (TM 10-4610-232-24P)
Washers (TM 10-4610-232-24P)
Observe specific Warnings in the text.
WARNING
Make sure electrical power is disconnected before working on unit. Failure to do so
could result in serious injury or death from electrical shock.
REMOVAL.
a. Refer to Figure 4-86, sheet 1 and disconnect the seven power input cables (phantom) which are connected to the
junction box.
b. Remove four capscrews (1 ), washers (2), nuts (3), Iockwashers (4) and washers (5) and remove junction box (6).
DISASSEMBLY.
a. Loosen (do not remove) screws (7) and slide latch (9) to the side to open box (6) door. In the event that you loosen
screw (7) too much, washer (8), latch (9), spring (10) and nut (11) will be free and must be reassembled as shown.
NOTE
Refer to Figure 4-86, sheet 2 for wiring details.
b. Tag and disconnect all wires from harnesses(18 thru 24) to the twelve MOVS (37). All connections to MOVS are
made as shown in the typical connection view. Connections from each harness to the MOVs are individually shown in
the seven connection views.
c. Remove four screws (12), nuts (13) and washers (14) for each harness (18 thru 24) to be removed. Dust caps (15,
16 and 17) are now free. Remove harnesses(18 thru 24).
d. Remove gaskets (25 thru 31).
e. Remove screw (32), washer (33) and panel (34).
f. Remove screws (35), Iockwashers (36) and twelve MOVS (37).
g. If necessary, remove four drive screws (38). Nameplate (39) is now free.
Change 2 4-277
