I have a 72Kb PDF extract from a Sanden service manual showing compressor clutch disassembly which I will now try to upload. P.S. read the last paragraph re air gap. It's from a Spanish manual download site. Here goes.......

Further to my post yesterday; for the air-gap adjustment, see rangerovers.net/forum "airconditioning erratic january 10th 2008". On the same site," AC Grounding points november 7th 2008" is another detail to eliminate. Cheers, Fixes.

Gday from Oz. To ukadamwest, researching same symptoms on my 95 4.6, three other points to check are 1* clutch air-gap excessive (remove spacing shim, or machine clutch face and make new oversize shim). 2* weak power supply via scrawny wire from relay (rig an extra wire from relay output pin...