In all the Q's I'v seen, I have three QR-25's running and a spare, the valve
disk is in a cylindrical cast iron body in the head. Two valves for each
cylinder. The HP exhaust valve should have an unloader on the top that
sticks up another 4 inches with an air line that goes down to the oil pump.
The unloader has a diaphram that ruptures every 4-5 years. The other three
valve thingies (I love our level of technical jargon) have a hex cap
covering the screw that seats the body in the head. Each thingy will have 4
bolts holding it on the head. In each cast iron body, a bolt holds a
slotted cap that holds the disk and a spring in place. Usually only the HP
exhaust valve gets crudded-up with carbon and this only happens if you run
the **** out of it like I do. I make new gaskets from paper card stock, the
kind that I blister pack products onto. I think the OEM gaskets are just
heavy paper. If you're lucky the gaskets won't tear when you dissassemble.
Might be worth a look at: http://www.quincycompressor.com/


"John Hall" wrote in message
...
I was waiting, (lurking), to learn how to do this, but my little
Quincy(circa 1960) has two plug like thingies on the top of the head which
I assume gains me access to the valves, not bolted valve body thingies. Do
I have valve discs that need maintenence,or some other design? If so, do I
just unscrew these things with a tie rod wrench or such? I'm guessing if
they are gasketed they might be like sparkplug gaskets and ,(hopefully),
reusable.

John
"Tom Gardner" wrote in message
. ..
Unbolt the 4 bolts from each of 4 valve body thingies from the top of the
head. Make or buy (shudder) new gaskets. It'll be self-evident.
Usually just the exhaust valve on the high pressure side gets
carboned-up. You'll know when the pump is running more than usual and it
won't get up to pressure. Mine get gunked-up once a year running 10
hours a day with a 50-70% duty cycle.


"JB" wrote in message
...
Tom,

Thanks for the help. How do I remove the valve disks to clean them?

Thanks again.

Joe...

"Tom Gardner" wrote in message
...
Ok, sorry...I use synthetic compressor oil from Grainger, second choice
is a non-detergent (keeps water suspended) like Shell Rotella, although
anything will do...keep an eye on it and change it once in a while.
Your Quincy will last FOREVER! You'll have to take out the valve disks
and clean the carbon off once in a while (yearly under daily use).

"JB" wrote in message
...
Hi Guys,

I am looking for recommendations and a source for compressor oil. It
is for my Quincy 325 Compressor. I went to HD and Lowes and they do
not have much of a selection and I am not sure if what they sell is
compatible with Quincy.

Thanks.

Joe...