TM 5-4520-253-13
l N S P E C T / S E R V I C E H E A T E R C A S E A S S E M B L Y ( C O N T )
2.
3.
4.
5.
6.
b.
c.
d.
e.
Remove six screws (5) and lock washers (6) and lift off bottom cover (7).
Reach through heater case opening (8) and disconnect louver linkages from louvers.
Remove right-hand and left-hand louver panels (9 and 10) by unlocking eight studs (11) at
each panel.
At exhaust end of heater case, remove eight screws (12) and lift off rear cover (13).
Examine heater case for surface rust and scratches.
Check for missing or damaged hardware including rivets (14), studs (11), and stud receptacles (15).
Replace as needed. To replace stud (11), remove solid washer (16). Install new stud and press
on new washer.
Check for dents, frame distortion, and broken welds.
Check fixed louvers at rear of heater for obstructions. Be sure air can circulate freely through
the louvers.
Check shield (17) and straps (18) for security. The sheild and straps are held by rivets (14).
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