Table 4-1. Unit Preventive Maintenance Checks and Service(Continued)
W -
Weekly
M -
Monthly
Q - Quarterly
INTERVAL
ITEM
ITEM
TO BE
NO. W
M
Q
INSPECTED
PROCEDURES
23
c.
Inspect brush holders and brushes for
(cont)
(cont)
grit and dirt. Check that brushes do
not stick in holders. Check for proper
spring pressure (para 4-37). Check for
minimum brush length of 7/8 inch
(22.2 mm).
d.
Check to ensure that the brush pressure
springs will not come to within 1/8 inch
(3.2 mm) of frame before next inspection.
24
Main and Exciter-
a.
Inspect pulleys for cracks and breaks
Auxiliary
and for broken sheaves.
Generator Pulleys
and Belts
b.
Check for loose or missing mounting
hardware.
c.
Inspect belts for tightness. Check to
ensure belts are not cracked, broken,
stretched, or damaged.
25
Air Compressor
Inspect for bent, cracked, or damaged air
Air Cleaner
cleaner. Check filter cartridge for dirt
Intake
and corrosion. Service filter in accordance
with LO 55-2210-223-12.
26
Compressor
Check governor for proper operation.
Governor
Air pressure shall be between 120 and 130
psi (827 and 896 kPa).
27
Engine Hood
Inspect structural parts for wear, corrosion,
and Door
broken welds, cracks, and security of
Assembly
mounting. Check door lock for ease of
operation and tightness.
28
Handrail, Up-
Inspect parts for wear, corrosion, broken
rights, Steps,
welds, and loose mounting.
and Cutter Lever
29
Exhaust Pipe
Check for plugged or burned-out exhaust pipe.
30
Exhaust Muf-
Check muffler for holes, splits, or damage.
fler
31
Engine System
Check warning bell for proper operation.
Warning Bell
4-7