Dan, I was insinuating that Gunner might not remember where the whole
'effing compressor was. I haven't seen my Quincys in years...I hope
SOMEBODY is maintaining them.

wrote in message
oups.com...
do you remember where
the pump is?

On the off end of the crankshaft. Some of these pumps were designed
to pump oil in either direction so that the compressor was reversible,
and it accomplished this by having the outer pump bore rotate a bit,
dragged by friction, which would cover and uncover appropriate ports.
On shutdown the compressor would sometimes rock backwards when it
stopped, rotate the pump body, and there it would stick and give no oil
pressure next time it started. Bit of a shortcoming. The pump is also a
long way above the sump level in larger Quincys, and doesn't prime
well.
Oil "pumping" (oil in the air) is often caused by too much oil
in the case, where the rods strike it and flood the cylinder walls. The
rings hydroplane and oil gets past them. Another factor we experienced
was multigrade oils: they are light oils with viscosity modifiers, and
seem to flash off the cylinder walls quicker and end up in the air.

Dan