Pinhole leak in head of 919.152145

by Paul
(Nixa, MO)

919.152145 This shows the top of the head. the pinhole is visible in the cone shaped

919.152145 This shows the top of the head. the pinhole is visible in the cone shaped

919.152145 This shows the top of the head. the pinhole is visible in the cone shaped
919.152145 This is a closer view of pinhole in recess
919.152145 Super closeup view of pinhole in bottom of recess

Pinhole leak in head of 4gal 150psi Craftsman mdl 919.152145


My compressor has developed a leak. I disassembled the top plastic shroud and the leak is coming from a perfectly round pinhole in the top of the head, down in the bottom of a recess "hole". (See photos of pinhole in recess.) This almost seems like it is supposed to be there and that something pressure related has popped out of the recess... Is this the case? The diagram does not show a pressure fitting in the head. Do I replace the head, and if so, do I also replace gaskets, and outlet tube seal? Or, is there a part that has popped out that can be replaced more easily than replacing head? Thanks.

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Dec 08, 2014
Thanks
by: Paul

Thanks Bill. It started leaking all the time through that pinhole. So, now that you mention it, the only way for it to leak through the hole n the head when the compressor is off is if the check valve were not working correctly. I'll replace the check valve and go from there. Again, Thanks.

Dec 07, 2014
Pinhole leak in head of 919.152145
by: Bill

Paul, I don't think this has some much a developed a leak, but may be the default unloader for this compressor... I think.

When you say it's developed a leak, how do you know?

If it is an unloader pin hole then the hole should leak air all the time the air compressor is running yet when the compressor reaches cut out pressure, that hole may wick air for a few seconds, but then stop.

If the air is leaking all the time when the compressor has cut out on high pressure, then if this were my compressor, I would bleed out all the pressure from the tank with the air compressor off, and check to see if the tank check valve was leaking. That may be the problem.

Bill

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