TM 9-4110-255-14
4-20. CONTROL BOX ASSEMBLY REPLACEMENT .
This task covers:
a. Removal
b. Installation
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Lock Washers (2) (Control Panel)
Refrigeration unit shut down (para. 2-7) and battery
1, Appendix G
disconnected (para. 4-35).
Lock Washers (2) (Bracket)
Control box cover door raised and latched.
1, Appendix G
Left side door open.
Lock Washer (Clamps)
General Safety Instructions:
1, Appendix G
Self Locking Nut
WARNING
4, Appendix G
Tie Down Strap(s) (As Required)
Exposed rotating parts are used in the
5, Appendix E
refrigeration unit. Personal injury can result if
Silicone RTV
battery is connected.
1, Appendix E
Marker Tags (As Required)
4, Appendix E
a. Removal.
(1) Be sure battery has been disconnected then remove two bolts (1) and lock washers (2). Open control
panel (3). Discard lock washers.
(2) Remove two bolts (4), lock washers (5), flat washers (6), and sensing bulb bracket (7). Discard lock
washers.
(3) Remove self locking nut (8), lock washer (9), and bolt (10). Discard lock washer and self locking nut.
(4) Remove clamp (11) but not clamp (12).
(5) Cut tie down straps (13) and remove grommets (14) as necessary to remove sensing bulb (15). Carefully
pull sensing bulb through access sleeve (16) in heat shield frame.
(6) Remove any silicone RTV remaining in grommets (14).
(7) Tag and disconnect wire leads from components as necessary. Cut tie down straps as necessary and pull
leads from control box assembly.
(8) Remove lock nut (17) and strain relief cable bushing (18).
(9) Remove six screws (19) and control box assembly (20).
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