Instructions For '93 Impreza

NOTES:

1. Always lubricate all O-rings before installation.
2. Always tighten fittings to proper torque specifications.
3. Observe all safety recommendations.
4. System to be serviced by qualified personnel.

1. Repair any problems or leaks before beginning retrofit procedure.

2. Disconnect negative battery cable.

3. Recover all R-12 refrigerant from the vehicles A/C system utilizing a UL approved R-12 recovery device.

4. Disconnect the electrical connection from receiver/drier pressure switch and remove the existing R12 receiver/drier from the vehicle and discard. Allow as much oil as possible to drain from A/C hoses or pipes.

5. On the attachment block surface that contacts the receiver/drier, remove the GUIDE PIN and make sure that the block surface is flat after removal.

6. Use touch-up paint to paint the sight glass on replacement receiver/drier; part # 73411FA100. The sight glass can not be utilized in testing R-134a performance.

7. Remove and discard the receiver/drier O-rings and replace with new O-rings, part number: 73039AA010. Lubricate O-rings with the specified PAG oil lubricant.

8. Install the replacement RECEIVER/DRIER, P/N: 73411FA100, to the vehicle, torque to the proper specification, and connect the pressure switch electrical connection.

9. Install an adapter valve - low pressure, P/N: 73058AA100 to the low pressure suction hose. Torque the adapter to proper specification per the torque chart.

10. Install an adapter valve high pressure, P/N: 73058AA110 to the high pressure discharge hose. Torque the adapter to proper specification per the torque chart.

11. Add 180cc of PAG oil lubricant, P/N: K0010FS100 to the system as follows:

a. Follow charging station equipment manufacturer's procedures.

b. If there is no provision for lubricant addition, use the following procedure.

^ Prepare the vacuum pump to pull negative pressure at the low pressure adapter fitting.

^ Connect one end of the high pressure charge hose to the high pressure adapter fitting.

^ Place the other end into a graduated, marked container that contains the specified type of PAG lubricant.

^ Pull a negative pressure (vacuum) on the low side of the A/C System, which will draw the lubricant into the high side.

^ Discontinue the negative pressure (vacuum) when 180cc of PAG oil lubricant, P/N: K0010FS100 has been drawn into the system.

12. Vacuum the A/C system for a minimum of 30 minutes.

a. After 10 minutes close the manifold gauge valves & perform a "VACUUM LEAK TEST".

b. After 5 minutes re-check the low pressure gauge reading. If the vacuum level has changed more than 1in HG, pressurize and perform an electronic leak test of the system.

c. If no leak is indicated resume evacuation (remaining 20 minutes).

13. Charge system with 21 oz./0.6 kg. R-134a refrigerant and operate the system for 10 minutes at idle. Install the R-134a service caps (the cap is an important part of the service valve seal), and perform leak test.

14. Remove and discard the existing refrigerant R-12 system label from upper radiator core support. Paint upper radiator core support if damaged during removal of label.

15. Fill out the retrofit label by lifting white backing tape and writing in oil type PAG 100, the oil amount 180cc, and the R-134a charge amount 21 oz./ 0.6 kg. Locate the label in a highly visible location such as the fire wall or hood. Pull white backing off the label and cover the label with the clear portion of label.

16. Conduct a performance test. Reference service manual for performance characteristics.