TM 9-4520-260-13
4-21. MOTOR BRUSHES
This task covers:
a. Removal
c. Cleaning
e. Testing
b. Inspection
d. Installation
INITIAL SETUP
Tools
General Safety Instructions
Tool Kit, Service Refrigeration Unit
Material/Parts
The ignition system of this heater contains
Lint-free cloth
dangerous voltages which can cause severe electri-
cal shock. Be sure to disconnect power before any
maintenance actions.
Equipment Condition
Power disconnected and fuel supply turned off
Clean parts in a well-ventilated area. Avoid inha-
lation of solvent fumes and prolonged exposure of
skin to cleaning solvent. Wash exposed skin
thoroughly. Dry cleaning solvent is potentially
dangerous to personnel. Do not use near open
flames or excessive heat. Flash point is 140
F
(60 ).
C
Remove cap (1) securing brushes (top and bottom) (2) in motor (3). Remove brushes from motor.
INSPECTION
NOTE
A new brush is about 1/2 inch long.
Inspect the spring and brush assembly for uneven wear, scoring, pitting, or other damage. Replace the brush if worn to
less than 5/16 inch.
4-35