At 09:09 PM 3/23/96 PST, you wrote:
>>>>"James R. Ferguson" said:
>
> > I have a 2 cyl. Quincy that I put a 3 hp 220 volt motor on to replace a 1 hp
> > 110 volt motor. I almost doubled the size of the motor pully. It is
> > pressure lubricated and has hydraulic unloaders.
>
>What's a hydraulic unloader? Should I get them for my compressor (I got a 5HP
>"Sanborn" for $60 at a yard sale, whee!)
>
A hydraulic unloader uses the oil pressure of the compressor to allow the
intake valves to close. It's pretty much a standard on better quincy
compressors. In other words, the compressor puts very little load on the
motor until it is up to speed.
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Jim Ferguson
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