Refrigerant Oil: Service and Repair

Lubrication

1. SYSTEM OIL STABILIZATION
Prior to opening the refrigerant system for repairs (except compressor seizure) the system must be stabilized for correct oil replenishment.

Follow these procedures:
1. Engine speed set to 1,500 rpm
2. A/C "ON"
3. Air source to recirculate
4. Blower in 4th or high speed position
- Make sure the air entering the evaporator is above 26.7 °C (80 °F).
- The discharge (high) side pressure must be above 588 kPa (6 kg/sq.cm, 85 psi).

5. Operate the A/C for 10 minutes.

2. SYSTEM DISCHARGE
Slowly, discharge the system starting with the high-pressure side until the pressure drops below 345 kPa (3.52 kg/sq.cm, 50 psi), then open the low-pressure side.

3. OIL REPLACEMENT




After stabilization and discharge, replace the component, adding the appropriate amount of oil (ZXL100PG/ZXL200PG) to the new component before installation.

If the compressor is replaced (after stabilization):
1. Drain and measure the oil from the original compressor.
2. Drain the oil from the replacement compressor and refill with the same amount that was drained from the original [20 ml (0.7 US fl oz, 0.7 Imp fl oz) minimum]. Always use ZXL100PG for the replacement oil.