old thread I know but I was facing the same problem as the rest of you with an old LMF compressor I was trying to restore. Turns out (I didn't know before 2 weeks ago) it's a V12 compressor, made in 1982 but actually designed back in 1973/74....
Prior to 2 weeks ago, I'd just about given up, and sent mail off to LMF directly on the off chance of getting some info from them. Didn't hold up much hope frankly.... Literally the next working day I got an email back and they were able to get a pdf manual of the compressor, with schematics allowing me to id parts I needed to replace, within 3-4 days. Amazing customer service for something designed nearly 40 years ago!! I work in the IT industry and have NEVER seen service like that.
Anyway, I stripped the compressor down and identified that the 3rd stage pressure valve had a broken spring, so need to get a replacement valve. I'm just waiting to hear back from them with a quote for the replacement part.
Anyway, for anyone with an old LMF compressor looking for manuals, I'd highly recommended contacting LMF directly. BTW, the schematics seem to identify the parts plus their actual sizes/dimensions, so I'm guessing this may be enough to get OEMd parts elsewhere. e.g. for piston rings ?
Regardless, because of the brilliant service I've received from them I probably will be inclined to buy the parts off them unless the bill is 4 digits!
thanks,
Doug