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Signature620 · 10-10-2016, **(Subject: Air Compressor Head )**

Hi, could somebody please explain the purpose of this cut-out in the compressor heads? I'm getting air from it while checking for boost leaks. Thanks.

Rawze · 10-11-2016, **(Subject: Air Compressor Head )**

I don't know what it is for, but it is not supposed to be creating a boost leak.

donaldray · 10-11-2016, **(Subject: Air Compressor Head )**

Looks like a WAB61W17CH2,CYLINDER HEAD, WABC0 85MM, ISX 9111539212, to me.

donaldray · 10-11-2016, **(Subject: Air Compressor Head )**

Here is a video on rebuilding it:
https://youtu.be/skv3VWJmxC8

they sell them on ebay also.

You first might want to read over this material:
http://www.bepco.biz/sites/default/files...0Pages.pdf

Signature620 · 10-11-2016, **(Subject: Air Compressor Head )**

This compressor in question also cycles frequently but there are no chassis air leaks and the brakes are adjusted right. Could I be dealing with a sticky unloader valve or a bad compressor head gasket?

Hedley · 10-11-2016, **(Subject: Air Compressor Head )**

or a soot clogged air line.

hhow55 · 10-12-2016, **(Subject: Air Compressor Head )**

I recall gearhead telling me, that soot can also accumulate in the air tank's as well. The air tank's can become so contaminated with soot , that eventually the truck has no air for the brake's to function .
This may be of help to other's.

Signature620 · 10-13-2016, **(Subject: Air Compressor Head )**

No sign of carbon build-up. I forgot to mention this is a CM570.