TM 5-4520-253-13
Table 3-2. Unit Preventive Maintenance Checks and Services
NOTE
If the equipment must be kept in continuous operation,
check and service only those item that can be checked and
serviced without disturbing operation.
Make the complete
checks and services when the equipment can be shut down.
M—Monthly
Q-Quarterly
Interval
Item
ITEM TO BE INSPECTED
No.
M
Q
PROCEDURE
CONTROL BOX
1
•
Unlock stud assembly on control box cover Lower cover. Clean as
follows:
WARNING
Dry cleaning solvent P-D-680 (safety or
Stodard’s Solvent) is potentially dangerous.
Avoid repeated and prolonged breathing of
vapors and skin contact with the Iiquid. Do not
use near open flame, arcing equipment, or
other ignition sources. Always wear eye pro-
tection and protective clothing. Flash point of
P-D-680 is 100° to 138°F (38° to 59°C).
Death or serious injury could occur if com-
pressed air is directed against the skin. Do not
use compressed air for cleaning or drying
unless the pressure is/has been reduced to 30
psi (207 kPa) or less. When working with com-
pressed air always use chip guards, eye protec-
tion, and other personal protective equipment.
a.
Remove grease, oil, and fuel deposits by wiping with rags dampened with
P-D-680 cleaning solvent. Remove excess cleaning solvent and dry with
compressed air.
b. Clean electrical components by Ioosening dirt and dust with clean, dry,
soft-bristle brush then blowing dirt and dust away using compressed air.
c. Dirt deposits that cannot be removed by this method shall be cleaned
with minimum quantities of cleaning solvent. Dry immediately with com-
pressed air.
Change 1
3-11
