SWITCH BOX ASSEMBLY MAINTENANCE

TM 9-6115-663-13&P

(3) Connect power supply AC Return line to terminal Y of contactor.

WARNING

Dangerous voltage exists on live circuits. Always observe precautions and never work

alone. Failure to observe this warning can result in severe personal injury or death.

(4) Apply power to power supply.

(5) Listen for sound of contactor operation.

(6) Perform folloting continuity checks. If any multimeter indication is not correct, replace

Lead Placement

Multimeter Indication

Contactor Terminals

open circuit

32 and 33

21 and 22

11 and 12

A1 and A2

B1 and B2

C1 and C2

open circuit

A1 and B1

open circuit

B1 and C1

open circuit

C1 and A1

(7) Remove power from power supply and disconnect lines connected in steps a.(2) and a.(3).

b. Repeat steps a.(1) through (6) for contactor K2 (15, figure 5-11).

5. Reassemble switch box assembly as follows:

a Refer to paragraphs 5-8 through 5-12 and repair or replace any defective parts.

b. Position the switch box cover (4, figure 5-11) in front of the switch box assembly.

c. Connect P3 (8) to J4 (11).

d. Position the switch box cover (4) over the switch box assembly and align the mounting holes.

e. Install lock washers (2), flat washers (3), and screws (1), that secure the switch box cover (4).

5-21