TM 55-2210-224-34
3-23. CRANKING CONTACTOR
This task covers:
a. Removal
d. Inspection
g. Installation
b. Disassembly
e. Repair
h. Adjustment
c. Cleaning
f. Assembly
i. Test
INITIAL SETUP
Tools
Material/Parts
Tool kit SC4940-97-CL-E12
Drycleaning solvent (Item 34, Appendix B)
Electrical insulating varnish
(Item 37, Appendix B)
Test Equipment
Variable dc voltage supply
REMOVAL
WARNING
•
High voltage is used in the operation of
equipment. Do not be misled by the term
LOW VOLTAGE. Potentials as low as 50
volts may cause death.
•
Remove rings, bracelets, wristwatches, and
neck chains before working around the
locomotive. Jewelry can catch on
equipment and cause injury, or may short
across an electrical circuit and cause
severe burns or electrical shock.
1. Open electrical equipment cabinet door
and set battery switch to OPEN. Make
sure electrical wires are labeled with wire
numbers or polarity signs. Tag and
disconnect wires from cranking contactor
assembly (3).
2. Remove two capscrews (1), lockwashers
(2), and cranking contactor assembly (3).
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