What valves look like on a 58 year old compressor

My Quincys seem to do a lot better with the carbon after we changed to synthetic. Also, we only run 135 psi. so the valves don't carbon up so bad. The valves have to come apart once a year or so. I doubt that your valves weren't cleaned as often, the carbon will bind the valves and it won't pump much air.

OK, so do you clean them once a year? All four valves? How do you clean them?

I recently changed to 150 PSI. Why not. Lines are at 90 PSI. Gives me some cushion.

Also I wonder if I need to clean the intercooler and "cushion chamber".

I thought that synthetic oil for some reason was verboten. At least that's what I was told for my Curtis.

Indeed. I have the same pump (1964) and it requires decarboning about every 3 yrs. And I run Mobile 1 in the crankcase.

Gunner

"Lenin called them "useful idiots," those people living in liberal democracies who by giving moral and material support to a totalitarian ideology in effect were braiding the rope that would hang them. Why people who enjoyed freedom and prosperity worked passionately to destroy both is a fascinating question, one still with us today. Now the useful idiots can be found in the chorus of appeasement, reflexive anti-Americanism, and sentimental idealism trying to inhibit the necessary responses to another freedom-hating ideology, radical Islam"

Bruce C. Thornton, a professor of Classics at American University of Cal State Fresno

You might want to switch to Grainger's synthetic compressor oil, it doesn't have the detergents that motor oil has. And, I do believe it's cheaper.

Do you do all four valves?

I mean, how HOT does the pump get.

Next oil change, Ill be using regular compressor oil. I scored a 5 gallon drum of it last year. Claims to be a synthetic. Id have to go out and see what it actually is.

Gunner

"Lenin called them "useful idiots," those people living in liberal democracies who by giving moral and material support to a totalitarian ideology in effect were braiding the rope that would hang them. Why people who enjoyed freedom and prosperity worked passionately to destroy both is a fascinating question, one still with us today. Now the useful idiots can be found in the chorus of appeasement, reflexive anti-Americanism, and sentimental idealism trying to inhibit the necessary responses to another freedom-hating ideology, radical Islam"

Bruce C. Thornton, a professor of Classics at American University of Cal State Fresno

Ayup,..only takes 15 minutes to do em all, every few years.

Gunner

"Lenin called them "useful idiots," those people living in liberal democracies who by giving moral and material support to a totalitarian ideology in effect were braiding the rope that would hang them. Why people who enjoyed freedom and prosperity worked passionately to destroy both is a fascinating question, one still with us today. Now the useful idiots can be found in the chorus of appeasement, reflexive anti-Americanism, and sentimental idealism trying to inhibit the necessary responses to another freedom-hating ideology, radical Islam"

Bruce C. Thornton, a professor of Classics at American University of Cal State Fresno

So, you just take them out, cover up with oven cleaner for a while, and then wipe off? Is that what you do?

The most important thing for me is to not screw up what I have.

I run this compressor for an hour a week. So it should last me for a while as long as I do not screw up too much.

Ayup. If there are baked on bits..I hit em with walnut hulls in the bead blaster.

Check the bolts and nuts that hold the valves together. When I got mine, one had come loose and the valve disk was flopping loose. and the springs.

It should run until the sun cools at that rate.

Iggy..running an air compressor is not rocket science.

"Lenin called them "useful idiots," those people living in liberal democracies who by giving moral and material support to a totalitarian ideology in effect were braiding the rope that would hang them. Why people who enjoyed freedom and prosperity worked passionately to destroy both is a fascinating question, one still with us today. Now the useful idiots can be found in the chorus of appeasement, reflexive anti-Americanism, and sentimental idealism trying to inhibit the necessary responses to another freedom-hating ideology, radical Islam"

Bruce C. Thornton, a professor of Classics at American University of Cal State Fresno

The "Why not" is wasted energy. A compressor pressure switch is ideally set to turn on at your line pressure & turn off a some reasonable differential above that. "Reasonable" is a compromise between avoiding short cycles and the wasted energy of too high pressure. For a 90 psi line, in a HSM shop, I'd use a cut off of 120. The energy to pump from 120 to 150 is more than pumping from 90 to 120. It's easier on the pump, too.

The "HSM shop" part is significant because of the intermittent nature of its use. So short cycling is hardly ever going to happen. Unlike Tom's brush factory, where the air use is continuous.

Also, if he cleans his valves every year, that may be 1000 run hours. It'd take you 40 years to put on 1000 hours.

Bob

I will measure and get back to you but 300+ wouldn't surprise me.

At an hour a week you might want to sell the Quincy and get a used Craftsman! I don't think the Quincy LIKES to run less than 8 hours a day. I run mine at least 12, and they RUN at least 50%. They cost about 1/2 of an employee.

Maybe I am wrong and the valve that I opened, IS the high pressure discharge valve, instead of being a low pressure discharge valve as I thought?

Look at this:

I can blow up a can of soup if left on the high side cylinder for too long.

And it makes a hell of a mess..and takes at least a year for the smell of chicken noodle soup to go away

Gunner

"Lenin called them "useful idiots," those people living in liberal democracies who by giving moral and material support to a totalitarian ideology in effect were braiding the rope that would hang them. Why people who enjoyed freedom and prosperity worked passionately to destroy both is a fascinating question, one still with us today. Now the useful idiots can be found in the chorus of appeasement, reflexive anti-Americanism, and sentimental idealism trying to inhibit the necessary responses to another freedom-hating ideology, radical Islam"

Bruce C. Thornton, a professor of Classics at American University of Cal State Fresno

Take the valve body out and stick your finger into the galley and it should lead to the output. It LOOKS like the HP but I don't have a reference at home. Did you pull all the valves? Also, check the diaphragm in the unloader.

I think that it is HP. Anyway, today I spoke to our Quincy dealer, he said to minimize messing with the compressor, as many parts are obsolete. he said "do not mess with it". At my rate of use, it will last til I die anyway, and that is udner optimistic assumptions about when I die. I think that I would be better off not pulling the remaining valves.

I've *got* to ask. "How do you run the bead blaster with the compressor apart?" (Or do you have spare compressors as well?)

Enjoy, DoN.

I agree. I am surprised that parts aren't available. I'll bet there's plenty of new-old stock on dealers' shelves if you get into a bind.