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TM5-4120-387-14
(4) With wrench and screwdriver, remove the three screws, washers, and
self-locking nuts in relay.
(5) Remove relay.
b.
Inspection
(1) Check for loose, corroded, missing, or broken terminal connections.
(2) Check re
damage.
Replace if
c.
conti
four
D3 an
lay for cracks,
evidence of overheating, and any other visible
damaged.
Test
(1) Use continuity tester or multimeter set on lowest OHMS scale to check
nuity between terminals A1 and A2, B1 and B2, C1 and C2, and D1 and D2.
All
contacts should be open.
If there is continuity, replace relay.
(2) Check continuity between terminals A3 and A2, B3 and B2, C3 and C2, and
d D2.
All four contacts should be closed.
If there is no continuity,
replace relay.
(3) Apply external 28 volts dc power across terminals X1 and X2 and repeat
continuity checks between terminals A1 and A2, B1 and B2, C1 and C2 and D1 and D2.
All three contacts should be closed.
If there is no continuity, replace relay.
(4) Remove external 28 volts dc power source from terminals X1 and X2.
d.
Installation
(1) Using wrench and screwdriver, secure relay with three screws, washers
and self–locking nuts.
(2) Install protective body covering on relay.
(3) Install condenser fan and key flush to motor shaft.
(4) Using torque wrench fitted with hex head socket, torque two setscrews
to 82 inch-pounds.
(5) See tags and wiring diagram (fig. 4-7) and connect leads.
(6) Remove tags.
Follow-on procedures: 1.
Install condenser air discharge guard.
(See para 4-20.)
2.
Install top panel.
(See para 4-23.)
4-130
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