SECTION V. UNIT MAINTENANCE PROCEDURES
MAINTENANCE OF AIR COMPRESSOR
2-11. Replace Air Compressor Assembly.
This task covers: a. Adjust, b. Removal, c. Replacement.
Tool kit, general mechanic's,
TM 55-1905-223-10, power secured and
no pressure in system.
Tags, Item 9, Appendix C
Air compressor, P/N 40092
Pry bar, Item 7, Appendix C
a. Remove belt guard (1).
b. Loosen alternating current motor mounting bolts (5).
c. Correct any misalignment, bend, kink in belts (3).
d. Using a pry bar, move motor (4) away from air compressor (2) to tighten belts and tighten mounting
bolts (5). Use the following procedure to determine deflections.
(1) Use straight edge and measuring device to measure the distance between the center of the
pulley on the air compressor and the center of the pulley on the electric motor.
(2) Divide the measurement in half to find the center.
(3) Using straight edge and measuring device centered on the belt between pulleys, depress
(deflect) the belt 1/64 inch per inch of span. For example, if the span is 2 feet (24 inches),
deflect the belt 24/64 or 3/8 of an inch. Measure the force required to deflect the belt.