TM 9-2320-280-34
14-14. HEATER/AIR-CONDITIONING CONTROL
BOX REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Applicable Models
Manual References
M997, M997A1, M997A2
TM 9-2320-280-20
TM 9-2320-280-24P
Tools
Equipment Condition
General mechanic's tool kit:
Battery ground cable disconnected
(TM 9-2320-280-20).
Materials/Parts
(TM 9-2320-280-20).
Maintenance Level
Direct support
Personnel Required
One mechanic
One assistant
a. Removal
NOTE
Prior to removal, tag all leads for installation.
1.
Disconnect fuel pump lead (2) and compressor lead (3) from fuel pump and compressor jumper
harness (1).
2.
Disconnect four control box leads (28) from condenser fan leads (27).
3.
Disconnect four blower harness leads (16) from fan blower motor leads (15).
4.
Remove capscrew (18), lockwasher (17), clamp (19), and control box blower harness (20) from blower
housing (14). Discard lockwasher (17).
5.
Pull insulation (22) back to allow access to capscrew (21).
6.
Remove nut (11), lockwasher (12), washer (13), capscrew (21), washer (13), clamp (24), and
harness (20) from body (23). Discard lockwasher (12).
7.
Disconnect control box connector plug (6) from heater (5).
CAUTION
Handle cold control probe carefully to prevent damage to probe or
evaporator.
8.
Remove cold control probe (26) from evaporator coils (25).
9.
Remove screw (10), lockwasher (9), clamp (8), heater cable (7), fan harness (29),
and cold control probe (26) from heater outlet duct bracket (30). Discard lockwasher (9).
10.
Pull fuel pump lead (2) and compressor lead (3) up through grommet (4).
Change 2