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Bostitch air compressor cap 60p-of

My compressor is not hold air. it will only get up to 20 psi and does not go past that. help

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  • Anonymous Mar 14, 2014

    need to replace belt bostitch air cmpressor cap2000p-of cover off how do i get the piston shaft off to install new belt

  • Anonymous Mar 30, 2014

    won't compress beyond 20 psi


2 Answers

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Mine had the same problem.
One of the reed valves in the head had broken off due to metal fatigue. Take off black plastic housing with 5 screws along the bottom and one bolt under the handle (the front only). Unscrew the four allen headed screws on top of the compressor. Unscrew the discharge line from the head. You'll need part # AB-A640050 which is the valve plate assy. and possibly AB-9007012 which is the intake valve located in the top of the piston (if damaged). About $18 including shipping from Bostitch.

Posted on Dec 16, 2008

  • artgalnj Jan 18, 2011

    Had the same extact problem with my compressor. It would get as far as 80 psi and not go up any further and the motor kept running. LaMojoe was correct. The metal was erroded on the valve plate assembly and thus allowing air to flow through.


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Turn the gauge up to allow more air or try checking the drain plug on bottom of tank to see if it tight.
If these 2 don't fix it check all connections for leaks.

Posted on Sep 18, 2008

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1 Answer

My bostitch 6 gal compressor keeps running , and running , even goes into a higherpitch motor noise. can i check something ? or clean something to fix it ?

is it building up any pressure on the gauge
if the pressure recorded is around 40 psi or less , replace the failed poppet/reed valves in the compressor head
if it goes to 100 psi then replace the automatic controller for the motor

Jun 15, 2016 | Stanley Bostitch CAP200P-OF 6 Gallon...

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My bostitch oil free air compressor will not cut off at the factory setting of 150 psi what can I do

Ozzie, You could try cleaning and adjusting the cut off pressure and if that does not do it you can replace the pressure switch. Check the attached links,instruction and guides, Good luck
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Why will my bostitch pancake compressor 240 psi tank 180 regulator that the guages will not show building pressure

Hi, There are different posibilities. I would need more information. Was it always like that? Does the guage on the main tank and the guage on the regulator both not show more than 20psi? When the auto shut-off is triggered do you feel there is more than 20 psi in the tank?

Sep 15, 2014 | Stanley NEW Bostitch 2 HP 6 Gallon...

1 Answer

I have a Stanley Bostitch Oil Free Air Compressor 6.0 Gal 2.0 Hp Peak, 1.5 Hp Running 135 Psi The problem is it won't blow out air or hold the air.. How can I fix this?

Some Bostitch compessors are very unique in that they intake air from below the piston. If you cannot find an air filter, then your compessor has reed valve built into the piston that may cause problems. If you have an air filter on the head of the pump, then you have reed valves in the head. When the reed valves fail, there will be very little or no air pressure. Second problem with all compressors is the in-tank check valve. This valve allows air to enter the tank and not back-out into the compressor. Easy to check. Add air into tank with another compressor thru the quick connect and listen for air leaking around the head or pressure switch. If no leaks and pressure holds in the tank then valve ok. Examine the condition of the cylinder and piston ring by rotating the crank by hand so that the piston is at top of cylinder. Look for scratches around upper part of cylinder wall. If scratches, then replace cylinder and piston ring. If top of cylinder looks good, then suspect reed valves. Good luck

Sep 12, 2011 | Stanley Bostitch 2hp 6gal Air Compressor...

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My compressor will not go over 20 psi i have a craftsman 921 4 gal 125 psi compressor and it will not build past 20 psi i do not know how to get to the pistons and stuff what do i do?

The problem with compressors not building pressure is usually a bad pressure switch or bad regulator. Does the motor shut off at 20psi or does it continue running and not build pressure? If the motor continues to run with no increase in pressure, the you should go over the machine looking for air leaks from your regulator back all the way to the motor. Any air leak while the compressor is running can cause the pressure to "peak" way before the intended shutoff that it is regulated to.

Mar 01, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

2 Answers

My model CAP 60p-OF runs up to 80PSI then won't shut off, and can't get past 80 PSI. All they would tell me at the customer service was to take to a repair center. SInce that involves a $20 fairy ride and...

If your compressor is still under warranty it may be worth the trip, anything you do to it will stop/void your warranty. That being said, your compressor won't shut off until the pressure switch sees 130 to 150 psi in the tank. A couple problems will lead to what is happening to your compressor. First check your valve plate assembly, it's right under the head. All of the reed valves must be in perfect condition, no cracks, chips or warpage and laying completely flat against their respective holes. Basically the the bigger the leak around the valves, the less pressure that can build up in your tank. If you are getting 80 psi you're looking for a very small leak. If the valve plate is OK check your piston and cylinder. The cylinder should be very smooth and the ring on the piston must be tight and facing up all around the piston. They are bad for a small section turning downward and letting air leak out. Just like the valves the smaller the leak past the piston, the more pressure you'll get so look for any imperfection in the cylinder or piston ring. A fairly good place to find parts is You can get a good breakdown of your compressor and order parts from them.

Jan 27, 2011 | Stanley NEW Bostitch 2 HP 6 Gallon...

2 Answers

I have a bostitch 6 gal pancake compressor that won't build pressure past about 20 lbs. when I turn it off I don't hear air leaking out anywhere and when it's running it runs at a higher pitch ( similar to...

I'd pull the cover off to expose top of cylinder head and have a look at any intake air filter. In parts diagram, It appears there is a small one that would likely clog during the texturing process.

Jan 26, 2011 | Stanley Bostitch CAP2060P 105 Amp...

1 Answer

The compressor reaches 40 psi and won't build pressure past 40 psi it just keeps running. checked for leaks and could not find anything the reeds are working fine.

Hi, my name is John. Welcome to FixYa. There has got to be a leak, check the line coming from the pump to the tank, you may have to remove it to check. I find this is often over looked. Thanks for choosing FixYa...John

Nov 24, 2010 | Stanley FactoryReconditioned Bostitch...

1 Answer

My compressor will not build up over 20 psi. seems like a lot of air is blowing out of exhaust, is this normal?

You may have the pressure release valve stuck open.
Check that. If it isn't stuck open. take it back to the place you bought it for a refund / exchange.

Jun 30, 2010 | Stanley NEW Bostitch 2 HP 6 Gallon...

1 Answer

Will only charge to 40 psi, is supposed to charge to 150

You may have a problem still related to the original reason it was reconditioned.

However, you should have a regulator that you set to the tank pressure you want to maintain. Most have a tool regulator as well and 40 psi sounds like that is what it is set for.

If you do have a tank pressure regulator and it is still not charging above 40 psi, then either take it back or pick up a new regulator for under $20 at Home Depot and replace the gauge you have now.

Also, sometimes the gauge will have a needle tilted so that one end presses against the glass, and if you tap the glass hard with your finger it will move on around to the correct pressure.

Finally, if you are not experienced with small compressors, look under your gauge and see if there is not a black knob that pulls out and pushes in to turn and change the pressure.


May 21, 2009 | Stanley Factory Reconditioned Bostitch...

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