Fitting a NEW compressor

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 fill₃₃ quantity (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 quantity of oil as calculated above₃ (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.

Refit

1. Fit upper fixing bolt and flat washer to compressor.
2. Fit compressor and push bolt through mounting bracket.
3. Fit nut to upper fixing bolt.
4. Fit second upper securing bolt.
5. Fit flat washer and fit both lower securing bolts and nuts.
6. Tighten compressor mounting bolts to 45 Nm.
7. Fit drive belt tensioner. See ELECTRICAL, Repairs.
8. Clean compressor and pipe connection.
9. Remove caps from compressor and pipe connections.
10. Lubricate NEW ’O’ rings with refrigerant oil and fit to compressor.
11. Position air conditioning pipes to compressor, fit securing bolt and tighten to 45 Nm.
12. Fit bolt securing air conditioning pipe clip to coolant rail.
13. Connect multiplug to compressor.
14. Connect coolant hose and tighten clip.
15. Fill cooling system. See COOLING SYSTEM, Adjustments.
16. Renew receiver drier. See this section.
17. Remove stand(s) and lower vehicle.
18. Recharge air conditioning system. See Adjustments.