Fitting a new compressor

10. Remove and discard 2 ’O’ rings from compressor.

CAUTION: Immediately cap all air conditioning pipes to prevent ingress of dirt and moisture into the system.

11. Remove 2 lower through bolts and nuts securing compressor to engine.
12. Collect washer.
13. Remove 2 upper through bolts and nuts securing compressor to engine.
14. Collect washer.
15. Manoeuvre compressor from mounting bracket, remove compressor from beneath vehicle.

Fitting a new compressor

A new compressor is sealed and pressurised with Nitrogen gas, slowly release the sealing cap, gas pressure should be heard to release as the seal is broken.

NOTE: A new compressor should always have it’s sealing cap in place and must not be removed until immediately prior to fitting.

A new compressor is supplied with an oil fill quantity₃₃ (Xcm ) of 135 cm . A calculated quantity of oil must be drained from a new compressor before fitting.

To calculate the quantity to be drained:

1. Remove the drain plug from the old compressor.
2. Invert compressor and gravity drain the oil into a calibrated measuring cylinder. rotating the compressor clutch plate will assist complete draining.₃
3. Note the quantity of oil drained (Ycm ).
4. Calculate the quantity of oil to be drained from the NEW compressor using the following formula:

Xcm3- (Ycm3+ 20cm3) = Qcm3

5. Remove drain plug from new compressor and drain the quantity of oil calculated in the₃ formula above (Qcm ). Fit and tighten compressor drain plug.

Fitting an existing compressor

When refitting an existing compressor a quantity of refrigerant oil equivalent to the amount obtained when the system was discharged must be added to the compressor.

Use only an approved refrigerant lubricating oil:

Sanden SP-10 Unipart SP-10

CAUTION: Do not use any other type of refrigerant oil.

Refrigerant oil easily absorbs water and must not be stored for long periods. Do not pour unused oil back into the container.