TM 5-4520-253-13
INSPECT/REMOVE/lNSTALL
CONTROL
BOX
(CONT)
2.
3.
4.
5.
6.
7.
Check quick disconnect terminals (8),
ring terminals (9), and butt connectors
(10) for loose connections, Replace
loose butt connectors.
Check HEATER OFF FAN soldered
wire connections (11) for broken
solder
Check for loose wires (12) at room
thermostat receptacle (7) inside
control box.
Check stud (1) for security, bent
or broken pins, and other damage.
Replace defective stud by removing
solid washer (13).
Install new stud
and press on new washer (13).
Check stud receptacle (14) for
security and distortion. Tighten or
replace rivets (15) as needed. Re-
move defective receptacle by
drilling out rivets. Install new
receptacle.
REMOVAL:
1. Release stud (1) and open control box.
2. Disconnect control box harness by pulling
plug (2).
3. Unlock studs (3) and Iift off control
box assembly (4).
4. Check camlock receptacles (16) in heater
case wall. Replace defective receptacles.
INSTALLATION:
1. Align studs (3) with pair of receptacles in
heater case. Tighten studs.
2. Connect plug (2) to receptacle in heater
case.
If control box needs cleaning, refer to table 3-2.
3. Close control box cover and secure with stud (1).
3-38
Change 2
