Oil Quantity Adjustment Prior To Compressor Refitment; Refitting Existing Compressor; Fitting New Compressor - Lotus Evora Service Notes

Lotus Service Notes
4. Release the clamp plate securing each of the pipes to the compressor and immediately cap the pipes and
compressor ports to prevent ingress of dirt and moisture. Secure the two pipe/hoses aside.
5. Disconnect the two compressor electrical harness plugs.
6 Remove the four bolts securing the compressor to the engine, disengage the drive belt and withdraw the
unit through the bulkhead aperture. Retain the compressor for oil quantity measurement if a new unit is
to be fitted.
Illustration TBA

Oil Quantity Adjustment Prior to Compressor Refitment

Refitting Existing Compressor

i) If the existing compressor is to be refitted after normal refrigerant recovery has been performed, a quantity
of oil equivalent to that recovered must be added to that already held in the compressor.
ii) If the system has suffered a rapid discharge, caused for example by accident damage, most of the re-
frigerant oil will have been lost. Drain the remaining oil from the compressor by removing the drain plug
and rotating the clutch plate. Add 150 cm³ of new refrigerant oil (see above) to the compressor before
refitment.

Fitting New Compressor

New compressors are sealed and pressurised with nitrogen gas. The sealing caps should be removed
only immediately prior to compressor fitment, at which time the gas pressure should be heard to escape
as a cap is slowly released. New compressors are supplied with an oil fill of 150 cm³.
iii) If normal refrigerant recovery has been performed, the new compressor oil should be drained off, and the
required oil quantity in the new compressor calculated and added:
- Drain and measure the oil quantity in the OLD compressor by removing the drain plug and rotating the
clutch plate. Quantity = X cm³
- Oil quantity to be added to new compressor = X + 10 cm³
iv) If the system has suffered a rapid discharge, caused for example by accident damage, most of the refriger-
ant oil will have been lost. In this case, fit the new compressor as supplied with its 150 cm³ oil charge.
Section PN
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