Medici silent compressor help

[Bill TGH]

folks I have been asked to repair a Medici silent compressor, seized & unloved for some time. I have cleaned up & got it running just fine, save that it spits a tiny bit of oil through the bleed regulator at the very bottom of the unit. I can't find out if that's normal for an old oil-compressor or if I have buggered it during repairs.

if anyone has experience or better, a manual/schematic for this unit, some help would be welcome.

[PR19_Kit]

That looks remarkably like the old 'fridge compressor plus fire extinguisher' setups I used in the 80s-90s.

They always bled some oil out in normal operation and eventually seized as there was no way to top it back up again. No probs there, I just replaced it with another compressor. 

I guess it'd be normal for that type of compressor, but could be wrong.

[scooter]

Were the seals replaced during the rebuild?  According to here, that could be the problem.

[Bill TGH]

Nope, seals were left alone as it developed lots of PSI without lag or struggle...
oil level seems ok as well.
installed a new oil/moisture trap & it is clear & so far Vallejo paint jobs have not been contaminated.

But, there is a a residual smell from the release valve (relieves excess pressure at approx 70 PSI)

I too had a home made fridge & tank setup in the 80's... worked great until I blew up a moisture trap ! It didn't have any oil issues that I recall....

[Bill TGH]

99.9% certain that its a rebranded Sil-Air compressor, its an older model but is very similar to the current Sil-Air 15 Export. Any manual for the Sil-Air 15 Export from that era (20 years ago plus), or any of the similar rebranded units like Aztek, Rotring or Revell should be fine.

Regards oil in the output, if the unit has recently been serviced / refilled, it's common for oil to be pumped through the compressor until the oil reaches the idea level in the motor housing, after which the problem should become minimal / non existent. Unfortunately if the head has become worn or the bore scored leakage / bypass may persist...

I only have a manual for the later automatic models, but with the exception of the pressure control unit, the auto / manual models are largely similar. There is little information on the motor itself in the manual, only replaceable external parts being detailed (Chassis P24, Motor P43);

Sil-Air Manual
www.air-craft.net


a big thank you to Air-Craft over on ARC.