14-18. AIR-CONDITIONING PRESSURE LINES REPLACEMENT (R-12)
This task covers:
General mechanic's tool kit: automotive
Air-conditioning system discharged
Companion seat removed
Air horn hose removed (TM 9-2320-280-20).
General Safety Instructions
Air conditioner system must be discharged,
prior to replacing components.
Air conditioner system must be discharged prior to replacing
components in vapor system. Failure to do this may result in injury
to personnel or damage to equipment.
Cover or plug all open hoses and connections immediately after
disconnection to prevent contamination. Remove all plugs prior to
All air-conditioning pressure lines are replaced basically the same.
This procedure covers the A/C compartment to compressor lines.
Suction line has a larger diameter than the discharge line, fittings
will not interconnect.
The following procedure applies to vehicles with R-12 refrigerant
only. Refer to para. 14-27.2 for vehicles with R-134a refrigerant.
Remove two capscrews (17), lockwashers (18), washers (19), harness bracket (20), clamps (21),
suction line (3), and discharge line (4) from body (5). Remove clamps (21) from suction
line (3) and discharge line (4). Discard lockwashers (18).
Disconnect suction line (3) and discharge line (4) from fittings (1). Remove and discard two O-rings (2).
Remove three tiedown straps (6) and slide insulation (7) on suction line (3) and discharge line (4)
away from suction hose (8) and discharge hose (9). Disconnect and remove suction line (3) and
discharge line (4) from suction hose (8) and discharge hose (9). Discard tiedown straps (6).