TM 5-4520-253-13
Table 3-2. Unit Preventive Maintenance Checks and Services-Continued
M—Monthly
Q-Quarterly
Item
Interval
ITEM TO BE INSPECTED
No.
M
Q
PROCEDURE
WARNING
Remove electrical charge from ventilating air motor capacitor
C3 by shorting out contacts using tool having insulated
handle.
Allow sufficient time for heater to cool to room temperature
before gaining access to heater compartments.
4
•
Remove right-hand louver panel (1) and left-hand louver panel (2). Clean
and inspect interior including combustion blower and ventilating air
motor. Lubricate louver pivots with MIL-A-907 antiseize compound.
5
•
Open left heater case door (3), front access door (4), right heater case
door (5), and control box cover (6). Clean and inspect interior of heater.
Lubricate door and cover hinges with MIL-A-907 antiseize compound.
3-14
Change 1
