Quincy Crankcase Vent

[brianpgriset]

I have a Quincy QT7.5 about ten years old. Over this ten years an oily film coated the top of the compressor. Not very much at all but though to make a mess when dust sticks to it.

I took some time to clean it up but want to not deal with it again.

It appears to me to be coming from the crank case vent tube which is between the pump case and fly wheel. Right now the vent is just a small stand pipe with two holes in either side and a small metal call at the top.

Can I stuff some filter material like fine scotch brite or similar in there to help reduce the vapors? Or install a filter? Any one else deal with this?

 

[The Tool Tyrant]

I wouldn't recommend sticking anything inside the breather tube that could possibly make it's way into the crankcase. I would go with your filter idea. The easiest would be to find a crankcase breather filter with an I.D. the same as your breather tube that would just slide over the tube and worm clamp it.
I would also check to make sure your crankcase is not overfilled.

 

[FMB4]

Also consider extending the vent tube into the top of a small plastic container, like an aspirin bottle, etc. Been doing this for some years now on my nearly 40 YO CH comp. Haven't had to empty the bottle yet.

 

[vwpieces]

my QT5 has material in the vent tube. Its some real coarse steel wool. Like that pot scrubby pad... choreboy? but its silver.
the packing is also vaguely shown in the parts diagram.

hotter and thinner the oil gets, the more it seems to vaporize and escape.

 

[brianpgriset]

Thanks. I figured something was supposed to be in there. I ordered a little 1” filter I can clamp over the tube. So we’ll give that a try.

 

[no704]

Throw a kids sock on it w a zip tie.

 

[The Tool Tyrant]

Thanks. I figured something was supposed to be in there.

I took a look at the QT 7.5 roc 200 parts book and it does NOT show any type of material inside the breather tube, just a pressed-in sleeve, the outer tube w/ 2 holes and a push-in cap.

 

[redmondjp]

The mesh inside the breather tube is standard for any type of coalescing filter, as used on pre-PCV automotive engines as well. The idea is that there is a lot of surface area on the materials inside, allowing the oil mist to stick to a surface, collect into larger droplets, and then drain back down into the crankcase.

 

[vwpieces]

Found a bargain for ya.
https://www.industrialairpower.com/111333-.010-al-mesh-breather-filter.html
Just kidding but the above link has a pic.
"Quincy 111333" should help with search

 

[brianpgriset]

Only $251! What a deal lol.

Good research everyone. Interesting that it sounds some are supplied with our without the coalescing filters. What Tool Tyrant mentions is exactly my setup.
Either way I plan to install a small filter on the tube at this point in time.