TM 9-4310-394-13
4-20.
KEY SWITCH REPLACEMENT.
This task covers:
a.
Removal
b.
Cleaning
c.
Inspection
d.
Test
e.
Installation
INITIAL SETUP
Tools Required
Tool Kit, General Mechanic's (Appendix B, Item 1)
Multimeter (Appendix B, item 2)
Materials/Parts Required
Cloth, Lint-Free (Appendix E, Item 1)
Brush, Medium Bristle (Appendix E, Item 2)
Solvent, Dry Cleaning (Appendix E, Item 3)
Equipment Condition
Air compressor unit shut down and cool.
a.
Removal (Refer to Figure 4-10).
WARNING
Electricity can severely injure personnel. Be sure that all power sources have been
completely disconnected from unit before beginning any maintenance on any electrical
items.
(1)
Unscrew key switch retainer ring (2), two washers (3), and remove key switch (1) from unit.
(2)
Tag and disconnect all wiring connected to key switch (1).
b.
Cleaning.
(1)
Remove all build up of dirt, oil, and debris from all surfaces.
WARNING
Serious injury can result in breathing fumes of dry cleaning solvent. Serious injury or death
can result from explosion of fumes from solvent. When using this solvent:
•
Clean parts in a well ventilated area.
•
Avoid inhalation of solvent fumes and prolonged exposure of skin to cleaning
solvent. Wash exposed skin thoroughly.
•
Do not use near open flame or excessive heat. Flash point of solvent is 100° F to
138° F (38° C to 59° C).
•
Wear eye protection when blowing solvent from parts. Air pressure should not
exceed 30 psig (2.1 kg/cm2).
(2)
Clean all metallic parts with a clean soft cloth or a medium bristle brush, and cleaning solvent. Be sure
that all gasket adhesive residue is removed if gasket material is being replaced.
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