B3000 SE Regular Cab 4WD V6-3.0L OHV (1998)
Hose/Line HVAC: Description and Operation
NOTE:
- Whenever a refrigerant line is replaced, it is also necessary to replace the receiver/drier.
The condenser to evaporator tube contains the high pressure liquid refrigerant upstream of the A/C evaporator core orifice.
The A/C manifold and tube is attached to the A/C compressor with O-ring seals and has the following features:
- The upstream side contains low pressure refrigerant gas.
- The downstream side contains high pressure refrigerant gas and a fitting used to mount a serviceable high pressure A/C charge port valve.
- The downstream side also contains a fitting used to mount the A/C pressure cut-off switch. A long-travel Schrader-type valve stem core is installed in
the fitting so that the A/C pressure cut-off switch can be removed without discharging the A/C system.