I'm helping a mate who has just bought a second hand silent compressor (on my recommendation) and the one he bought was know faulty, 'spares or repair' etc.
On testing there was no output (as advertised) but long-short, I partially stripped it (someone had been there before me) and found the reed valved and 'cylinder head' had a fair amount of carbon build up on them.
One reed just sits on a couple of location pins so can be removed and it and it's seats cleaned easily but the other is trapped behind a support (that manages the maximum opening) so I can't really get in / under that to clean it all.
I've had it in an ultrasonic cleaning tank at 60 DegC and whilst it did seem to remove (or soften) quite a lot of it, I'm not sure that it is properly cleaned in all the little crevices.
So, to the chemists probably, is there a reasonably 'safe' / chemical way I could remove this black stuff (carbonised mineral oil deposits?) without melting my fingers or the alloy / steel parts or should I drill the rivets out, strip it down and cleaning it mechanically (the stuff does scrape off reasonably easily from those bits now) and re-attach it with some small nuts and bolts?
Cheers, T i m
p.s. It may be that the fixed reed is bent slightly so might need removing to reset, or it could simply be held up slightly by said deposits. If it makes the compressor work, mate would invest in a service kit but they aren't cheap.