V 20 P/U 4WD L6-292 4.8L (1988)
Expansion Block/Orifice Tube: Service and Repair
REMOVE OR DISCONNECT
^ Discharge the system.
1. Condenser-to-evaporator line at the evaporator inlet (21).
CAUTION: Cap or plug the open line.
2. Expansion tube from the evaporator core inlet line.
^ Use needle-nose pliers to remove the orifice (130).
3. Expansion tube seal (0-ring) (12) from the core inlet line.
INSTALL OR CONNECT
1. Expansion tube seal (O-ring) (12) to the core inlet line (21).
^ Use new seal (0-ring) coated with clean refrigerant oil.
^ Insert the short screen and end of the orifice into the evaporator inlet line.
2. Expansion tube to the evaporator core inlet line.
3. Condenser-to-evaporator line at the evaporator inlet (21).
^ Evacuate, charge and check the system.
