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I have a 22 year old craftsman compressor model 919721920 and need some pump parts. Do you know where I can get a head gasket, o ring and valve plate assembly as well as a head gasket

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Posted on Jan 02, 2017

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SOURCE: Will not build up pressure

If this compressor is dry type with no oil needed, then it may have a worn cylinder and/or piston ring. With flashlight in hand, look under cylinder with piston in upper most position. If you see scratches most likely it needs cylinder / piston kit. Not to worry, not too expensive. If you compressor has a crankcase with oil, then you may have problems with valves in the head. Cracked or dirt under headvalves will prevent pressure from building. Finally there may be one or several leaks in the tubing, check leaks with soapy water. enjoy

Posted on Nov 29, 2008

  • 1383 Answers

SOURCE: Air compressor head gasket diagram

Campbell hausfeld has all their manuals on line at www.chpower.com / you can enter the model # of the whole unit or just the # of the pump. Also you can enter just a partial number example wl650 for a list of models is that range. Use caution when installing gaskets for chpower oiless pumps. Some of their gaskets are very brittle. After installing parts, turn pump by hand to make sure all parts are in their proper place and that there is suction. Enjoy

Posted on Dec 02, 2008

  • 1383 Answers

SOURCE: coleman compressor no build up of pressure

Parts for coleman are available at www.mastertoolrepair.com your compressor is listed as L0502710. If however you like to tinker, you can make a pretty good reed valve out of aluminum can material or other (any ideas?). It is fairly easy to cut, does not last as long as factory stainless steel, but for short term, why not? Good Luck

Posted on Jan 10, 2009

  • 68 Answers

SOURCE: Craftsman 3.5 hp portable air compressor keeps blowin head gasket

I would say the head or block is warped. Use Majic Marker to cover the mating surfaces , the head can be rubbed on a flat surface like a cast iron table saw to find the high spots, or the head can be rubbed on the block.
Careful work with a good flat file will remove the high spots.
The torque value sounds low even for an aluminum block, you could check with a small engine shop to get their opinion.

Posted on Apr 25, 2009

  • 1 Answer

SOURCE: install reed valves hitachi air compressor need pics

I believe in your model of air compressor, when you take apart the head portion to your compressor you should have four reed valves. When you have it apart, there should be two "grooves" on the bottom "plate" and two "grooves" on the top plate (where the reed valves go). the bottom part is easy (as you should already know) to set in the reed valves, but as i have also found out, as you probably have, that its a little more difficult to line up the other reed valves to thier "grooves" on the upper "plate". What you do to make sure that they stay in place is dab a little oil or grease on the reeds and place them in the upper "plate grooves" and carefully set the upper plate back in place where it goes on the compressor. It will hold them in place long enough to install it on the compressor and the small amount of grease that was there will quickly be burned up with no effect to the opperation to the machine.
Sorry, long winded explanation. hope this helps and if it didnt get to you soon enough i hope it helps out in the future. :-D

Posted on Jul 10, 2009

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2 Answers

I have a craftsman air compressor model number 921.153101 that won't pump-up over 40 pounds


Its probably a oil less compressor so it could be the reed valves are bad or the piston rings are bad.

Feb 01, 2014 | Craftsman Air Tools & Compressors

1 Answer

Air compressor model no. 921.153101 blowing air trough air cleaner


If you get air movement out of the air cleaner and it only compresses air to 25psi, you have bent or broken reed valves in the head. Take the head off the cylinder and inspect the valve plates and reed valves. This is a Craftsman compressor so you'll most likely have to get parts through Sears at www.searspartsdirect.com. For best results replace everything between the head and cylinder; gaskets, valve plates and reed valves.

Oct 03, 2012 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Compressor goes to 35 psi wont fill anymore


There are a number of possibilities. The head on the compressor pumps usually uses some type of reed valves to separate the intake and exhaust sides. You can remove the top bolts (usually 4 bolts) that hold the head on and inspect the valve plate(s). Are the reed valves (usually just small metal strips) broken or not seating on their plates. Are the gaskets in fine shape? If you get a tear in the middle of the head or valve plate gasket, where it separates the intake and exhaust, then the pump will only build up pressure to the range you have or sometimes up to only the 50psi range.

Another thing to check is if it has a one way check valve that goes into the tank where the pump line/hose feeds from the compressor pump into the tank. Many of the check valves use a simple plastic cup and a spring. If they get stuck open then that will also make it not build up pressure.

The other part I can think of is the control box but usually when they fail they either won't turn on the unit or they will leak air.

The last thing to check would be the piston ring(s) and cylinder/sleeve. The oil less compressors will wear these items out far more often then an oil style will. When the oil less piston and sleeve get scored up (from dirt ingestion) then they also will not build up much pressure.

Jul 20, 2011 | Craftsman 3 gal. Air Compressor, 1 hp,...

1 Answer

I have a craftsman air compressor 3 gal. 1 HP model#921.153101 the gauges go to about 45 and stop but the unit keeps running.I've checked for leaks there are none I left the air in the tank over night...


It sounds like a bad gasket. Either the one between the valve plates or the one between the head and top valve plate. The top gasket is the most common one that fails. If the middle of the gasket is broken, where it separates the intake from the exhaust, you will get symptoms just as you described. Will only build up a small amount of pressure. Here is a link to look at the parts diagram and to order parts from.

http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Air-compressor-Parts/Model-921153101/0247/0703000/50037535/00001?blt=06&prst=&shdMod=

Jul 15, 2011 | Craftsman 3 gal. Air Compressor, 1 hp,...

1 Answer

I am replacing the cylinder sleeve and compression ring on my Craftsman air compressor model 919165020. Searspartsdirect says that I need two compression rings. Is this right? My compressor only had one...


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

May 14, 2011 | Craftsman Air Tools & Compressors

1 Answer

I have a Craftsman 919.165610 2 stage oil free air compressor. It will not build pressure? I have replaced the check valve, checked the filter and still no luck? Help


Problem sounds like valve plate /reed valves or worn cylinder /vinyl ring. Easy to check, push piston to top position and examine cylinder neer top looking for scratches. If scratched, most likely vinyl piston ring/s are worn and allowing pressure to leak past. If cylinders look good /shiney all the way up to top, remove head/s and examine reed plate/s for missing/broken reeds and or torn gasket/s. If your reed plate is missing one reed and your are good at being creative, you can seal individual hole by threading and plugging with thin piece of bolt. Good luck and good holidays

Dec 30, 2010 | Craftsman 25 gal Air Compressor 3 12 hp...

1 Answer

I have a150 psi compresor that is 5 years old. it currently does not reach 150 psi without running for a very long time and sometimes just stays at 120 psi and wont get any higher ( the motor just keeps...


Repair all leaks to get true test of condition of cylinder / piston ring and check/reed valves. It is reccommended to know amount of time to fill tank when new and compare this time to present. Filling time is indication of wear. Another method to discover wear is to remove cover to pump and examine condition of cylinder wall close to top of cylinder (on oil-less models). If you see scratches on cylinder, air is leaking past piston seal. On pumps that use oil, very hot discharge air hose or pump head is indication of leaking valves or head gasket. Sears usually has good prices on replacement parts. Good holidays

Dec 08, 2010 | Craftsman Air Tools & Compressors

1 Answer

I have a Porter Cable air compressor model CPLKC7080V2. Air leaks from the pressure switch and aftercooler safety valve and the pressure switch before the compressor reaches 80 lbs pressure. I replaced...


I believe you have a head valve or piston ring problem. The parts you replace are suppose to leak. It is a safety feature that doesn't allow the motor to burn up before the pump warms up. Kind of like a soft start feature. If you look on the breakdown part number 107 Kit Valve Plate is what you need to inspect. Sounds like your valve plate is either worn or damaged. If you go into the pump you will have to get part 103 also which is a gasket kit. Or you can try to salvage the old gaskets.
If the valve plate is ok you will need to inspect the rings that go around the pistons. Some times you will get one that gets brittle and breaks off scarring the cylinder. Look for these two things, I am pretty sure one of them is the problem with your compressor.

Sep 06, 2009 | Air Tools & Compressors

1 Answer

Compressor is building up pressure very slow.


It could very well be the valve plate however before you order parts take a look at the cylinders. Unplug the unit, remove the cover from crank side and turn the compressor by hand till the/a piston is at top of stroke. Examine upper cylinder for scratches /wear or failed vinyl piston ring. On oil-free compressors, dirt and grit is sucked-in from the bottom of the cylinder and causes leaks between cylinder wall and piston. If scratched, air pressure is leaking down thru cylinder wall. Failed reed valves cause a pulsation at the intake port (air seems to be pumped out the intake). If you see a model number anywhere on the pump that begins with " WL", your pump is made by Campbell Hausfeld. Parts can be ordered from www.chpower.com. other-wise order parts from sears parts. Cylinder kits are around $40. Good Luck on the repair and email if you have questions.

Apr 02, 2009 | Air Tools & Compressors

1 Answer

Air compressor not filling tank


Most compressors with the problem that you are having suffer from leaking valves. As in a gasoline engine, leaking valves will lower efficiency. Valves in a compressor are in the form of reeds that seal against valve plate. Leaking reed valves or gaskets will increase the discharge air temperture. Inspect these parts with a magnifying lense. Look for evidense of wear or leaks. Also look for signs of air leaking from one cylinder to the other thru gaskets. Replace valve plate as necessary. Simple test, as your compressor is filling, check the intake for strong suction; as it neers the 92 psi mark suction will probably deminish if you have leaking valves. If suction remains strong at 92psi then you have a leak at the discharge side. Check with soapy water on all parts. Good luck

Jan 19, 2009 | Air Tools & Compressors

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