14-27.9. AIR-CONDITIONING SERVICE VALVE REPLACEMENT (R-134a)
This task covers:
Air-conditioning system discharged
Air horn to air cleaner hose removed
General mechanic's tool kit:
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.
Suction (low pressure) and discharge (high pressure) service
valves are replaced basically the same. This procedure covers
the suction service valve.
The following procedure applies to vehicles with R-134a
Remove tiedown strap (12) from harness leads (10) and high-pressure line (13). Disconnect
compressor clutch leads (11) from harness leads (10). Discard tiedown strap (12).
Cover or plug all open lines and connections immediately after
Remove high-pressure line (13) and low-pressure line (1) from service valves (3).
Remove and discard two O-rings (2).
Loosen two nuts (4) on service valves (3) and remove service valves (3) and O-rings (6) from
compressor manifold (7). Discard O-rings (6).
Remove screw (5), compressor manifold (7), and two seal washers (9) from A/C compressor (8).
Discard seal washers (9).