Foaming Oil

You have used a detergent oil.

If that's what the specs call for, don't worry about the foam; it's normal.

If the specs call for a non-detergent oil.............change it.

It's not detergent oil , Its YORK "E" oil" As specified by York

Okay. It was just a thought.

I've come close to making that mistake in the past.

Thanks to whoever undid my OT. I didn't think it was outside the realm of possibility.

Clean out the entire foam system, especially if stored for an extended period of time
Foam concentrate can cause the lines and tank to gum up, impeding foam performance. Add foam tank cleaner (part number N205701) in the tank and lines. Use according to label directions. If switching brands of foam concentrate, clean out the system tank and lines. (For best results, use John Deere Spraymaster ULTRAX foam concentrate.)

Thanks Fredsky And G.A

if you get too much you'll washout the bearings and have a complete failure

It's a fearful matter, So oil changing is not the solution without eliminating reasons of this phenomena.

any more suggestions are fully appreciated.

I wasn't suggesting that. because you have refrigerant in the oil (cause of foam) you can't tell just how much oil is in your system) checking for acid is standard practice. do whatever you want, those are just my suggestions based on over 30 years of experience.. I'd be looking close at the crankcase heater(s). as already stated a little foam is usual and isn't a problem....maybe you could include a pic of the bullseye?

What refrigerant--ammonia or halocarbon?

Depending on piping layout, if there is a small amount of liquid refrigerant returning with the vapor, it may cause oil foaming in some compressor(s) but not others.

Dear tornado

thanks for your input.

For refrigerant ,It's R22

if there is a small amount of liquid refrigerant returning with the vapor, it may cause oil foaming.

now we have reached for another question. Why some or a lot of liquid refrigerant return with vapor.

Is it a result for defected or un calibrated expansion valve,water cooler problems ,low cooling load or any others .

I have the answer but yo asked Mr Twister so I'll wait

An expansion valve may be adjusted for insufficient superheat, or it could be worn and thus not close tightly enough under light load.

If there are trapped double oil risers, you might occasionally get a slug of oil returning in the suction, which could have some liquid refrigerant mixed in.

If the foaming is light (a layer on top of the oil) or brief, it should be no problem, as it still contains some oil.

(I'm more of an ammonia guy; some "Freon" folks might have further ideas.)