Broken piston Have craftsman upright air compressor.A year ago the piston broke causing damage to the housing. I replaced piston and sleeve. I fired it up today hearing odd noise. The same piston was broken again!

Sources of noise from craftsman oil free compressors (could be Made by Campbell Hausfeld or Porter Cable) include loose fan, failing bearing/s on the piston rod and housing, failing seal ring on piston, air filter intake and loose motor mounts. With the housing cover off, check the fan blade for cracks or loose screw. Turn motor by hand till the piston is at top of stroke. Examine the cylinder for scratches close to top. If scratched, air is leaking past vinyl ring making noise and causing longer fill time. If everything looks ok, suspect noise coming from bearings. Hard to tell if bearings are failing by looking at them. I have seen many failures of the piston bearing on the crank (fairly easy to change, I use alternator bearing from auto parts ) , however, the bearing in the housing just behind the crank bearing is much harder to replacable. Good luck with your fix-it project.

I can not find a Craftsman compressor with that model number anywhere so here are a couple things to look into. If the compressor fills to 70psi and keeps on running check the valve plate and piston/cylinder assemblies. Check that the valve reeds on the valve plate are not bent, broken or warped from heat. Then check that the wiper (oil less) or pistion rings (oil splash) are not damaged and that the cylinder wall is not scarred up. Any of these will let the compressor fill up to the point where the air pressure leaks past the valves or piston and won't fill any further. If the compressor fills to 70psi then shuts off the problem is in the pressure switch. Some have an adjustment screw or bolt to control when it turns on and shuts off. If you had a drop from 100 to 70 the springs may be weak or broke and you'll have to replace the switch.

http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Air-compressor-Parts/Model-919165020/0247/0703000 This is the exploded view that I used.

67 head 65 gasket 64 reed valve plate 63 ring,this one goes under the reed valve plate 62 screw that goes thru the 61 piston 60is a ring that sets on the top of the connecting rod screw the piston with the ring into the top of the connecting rod then take the connecting rod end cap off and cover the studs with some rubber tubing.This will protect the crankshaft when you push connecting rod and piston assembly in to the sleeve that is seated in the block.The ring should be flexible enough to push into the sleeve,if not a bit of oil should help.Guide the connecting rod on to the the crank shaft.I hope this helps and thank you for using FixYa.com

Owner's Manual - CRAFTSMAN Air compressor 919165020, 919165050, 919165090, 919165230, 919167330, 919165221, 919165070, 919165310, 919164200, 919165060, 919165300, 919152922, 919165250, 919186430, 919155613, 919164150, 919165030, 919165130, 919165500, MG2-OILFREE, 919165110, 919167200, 919165000 - ManageMyLife.com

In my experience, these are really throw away compressors. I have had several. You might get the parts ... however, if the brushes are arcing, the armature is probably damaged. If that is the case, the motor has probably run hot. As such, the field may well be heat damaged now ... ok, so replace the motor right? Will cost you about $100.00 for parts ... add your labor ... even if that is $0.00, when you are all done, you will have a five year old compressor (worn sleeve and piston? worn reed valves) with a nice new motor.

That was my experience. I replaced the thing. I only use this little compressor at remote places. I have a larger, main compressor for other work.

its either a reed valve broke or corroded beyond function.remove the head and look at the plates.look at the piston rings while your in there sounds like its just worn out,but i just rebuilt mine for 80 bucks thats all the gaskets plates and piston with sleeve.the repair takes about an hour.if you do tackle this yourself remember the fan for the air cooling may be reverse thread.try not to break it.noone mentioned this to me but i got lucky and tried the other way before i got serious about removing it.good luck

Like most all compressors, these cheaper models have a cheap reed valve type heads on them, the reeds often break off causing sudden loss in compressor capacity, in some cases the rings may stick due to incorrect lubrication or from piston damage due to ingesting broken valve components that embed into the top of the piston and crush the ring grooves.

this is probably an "oilless" compressor, it has "piston" with a thin ring of leatherlike material acting as a piston ring, the "cylinder" is an aluminum sleeve - what usually happens is the cylinder gets scratched from dirt or just wear or the leather ring deteriorates, that's why it will go only so far - the only fix for this is to replace the cylinder and the piston

check your popoff valve first. it is the valve with the ring hanging on it. You will hear the air rushing.

If you don't hear any air rushing, you may have fried the piston rings or broke/chipped the piston(not your fault)..especially with oiless compressors

i broke the rod in my air compressor and cant find a place to buy a new one it is a pro source

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.