I have a weep of compressor oil which find its way out past the clutch. From time to time I have to clean the clutch gap to ensure the clutch engages when it should. It's workable, but replacing what's probably just one seal will give me on less thing to maintain. Has anyone ripped one of these babies apart/ replaced the seals?

no i haven't dismantled an ac pump but i believe the seals are teflon similar to those in power steering pumps

Main issue is probably going to be getting the seals. These folk https://automotivecompressor.co.uk do Nissen for around £15 a pair but dunno about other brands.

Should be a do-able fix if you can simply remove the outer seal from the outside and push the new one in. If you have to disassemble the pump it might get iffy. Best to find a dead one to practice on! Should be one of unknown origin in one of my stalled project boxes. (Was gonna rob the electromagnetic clutch for re-purposing.)

Clive

Thanks Clive, I mailed those guys last night. According to you tube you need to take the front cover off in order to be able to drift out the seal around the main shaft. Still looks do-able, but as you say, it's all about the seals. Sanden seem to be on 7th generation now, ours was series 3. I mailed the guys you linked last night, will see what they say, and they're v close to me too.

You need a special tool to insert on to the threaded shaft when you are refitting the front section Without that the seal will leak again.
I got that tool & the shaft seal from a US AC guy for my diesel P38's Denso compressor.
There is a good Youtube video on how to replace Denso 10PA series compressor seal.