craftsman 919.167782 has low pressure after fire

Craftsman 25 gal two stage low pressure 30 psi max


compressor around ten years old, two stage 25 gal. model # 919167782, started having problems after fire in garage assumed after looking at pistons needed new rings.

replaced rings and gaskets at that time.

still no build of pressure inspected valve plate and reeds cleaned still no pressure.

now have replaced valve plates with reeds and new gaskets again.

still no pressure over 30 psi.

Compressor was in garage at time of fire burnt itself out. mostly smoke and heat damage.

compressor ran right after just took a little longer than normal to fill and progressively got worse to low pressure, that's when started replacing parts apparently not the right one.

Thanks,
DaWayne Cotton

Comments for craftsman 919.167782 has low pressure after fire

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Oct 15, 2015
Low pressure
by: Doug in s.d.ca

Glad you got it sorted.

Thanks for the update.

Oct 15, 2015
leak
by: dawayne

Rods are different no way to switch up. Did find another ring from rod breaking after first replacement then had to buy it all over again. Rings were two different sizes. Swapped out and now is working again.

Thanks so much,
Dawayne Cotton

Oct 14, 2015
sleeve / oring / low pressure
by: Doug in s.d.ca

Yes, the short stroke one is the HP side, and is short because it has to compress already compressed air from the LP cylinder. If the airspace inside that cylinder were full size and stroke, there would be no further compression on that side.

As to the LP ring - is the sleeve fully in? Ordinarily the ring should seal the full length of the stroke. Is it possible you have the LP and HP rods reversed?

Oct 11, 2015
air leak
by: dawayne

Well I have found one of the new rings upon descend leaves a gap around cylinder. The other no light appears around ring, but it only travels maybe a 3rd of the sleeve. It is a two stage, so is this common operation?
Thanks Again
DaWayne

Oct 09, 2015
leak?
by: Doug in s.d.ca

If you did the PRV soap thing while it was pumping, and no bubbles, then it's likely not the problem.

The check valve is probably OK if you don't lose air whenever the pump is not running. So if you get 30psi and stop the pump, it should hold. If not, cleaning it should fix it unless it has deformed plastic parts in it.

If neither of those is the problem, we can go back to the pump.

Oct 09, 2015
prv and check valve
by: dawayne cotton

I have looked at them and how easy or hard should the check valve spring be? Seemed rather easy. Not sure how to really check the prv, I have used it several times to release air in tank before removing intake and lines. Have sprayed soap/water solution all around and not finding any leaks?

Thanks,
DaWayne Cotton

Oct 08, 2015
Low pressure
by: Doug in s.d.ca

Have you looked at the PRV and check valves?

Either could be gunked up or damaged by the heat and smoke...

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