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Craftsman 1 gallon direct drive oil filled wont build air pressure

Compressor wont build air pressure has one gallon tank direct drive oil filled

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Could be the gasket under the the cylinder head that separste the two reed i have the same compressor thats what happend to mine also could be a stuck check valve

Posted on Sep 19, 2009

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It sounds like you may have a broken reed on the diaphragm plate. This is located at the block. Remove the cover, and look for a cast metal assembly with fins. It will be attached to the side.

Posted on Apr 23, 2009

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1 Answer

My 60 gallon kolbalt was running and stop when it filled now it wont go o ever with the tank drain it spins free it does nothing no sounds either


When you say it does nothing do you mean the motor wont come on or the motor comes on and it wont build pressure? if the motor comes on, there are several possibilities:
1. The unloader valve is stuck open
2. The valves in the head are bad
3. The flywheel is loose
If the motor wont come on, the pressure switch is bad (which holds the unloader valve open)
http://www.mastertoolrepair.com/air-compressor-parts-vt6362-p-60727.html

Oct 10, 2016 | Kobalt 3.7-HP 60-Gallon 155 PSI Electric...

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I have a 3 gallon 1HP Craftsman air compressor has worked fine for years but now it won't build air pressure over 20lbs. Any suggestions?


Make sure there are no air leaks first.
Your pressure valve may need resetting or replaced as it could not be working. Your compressor might be wore out.
Is there a gizmo that you can turn to set pressure. if so that might not be working if you have tried to set it.

Sep 09, 2014 | Craftsman 3 gal. Air Compressor, 1 hp,...

1 Answer

Craftsman air compressor model 191.135131 wont build pressure


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.

May 22, 2012 | Craftsman Air Tools & Compressors

1 Answer

I have a Craftsman 3.5 hp, 25 gallon compressor. The compressor runs fine, but will not build pressure. Tank has pressure from the last cycle so I know it is not leaking. The compressor runs but no...


Hi Jim,

Disconnect your main air supply from the comp head to the receiver/tank and see if their is a reasonable air supply to atmosphere.

If not check that air is being taken in by the head intake filter

John

Aug 05, 2011 | Craftsman Air Tools & Compressors

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

My Craftsman air compressor has wored fine till now. It does not want to build up pressure beyond 50 psi.yes I did check the drain valve and no leaks. Motor seems to be putting out the rpm's and the oil...


Check for a leak between you compressor head (pump) and your tank. Your pump output may be good but as your tank pressure gets higher the leak will not allow the tank to build up.

Feb 04, 2011 | Craftsman 1 hp Air Compressor, 4 gal. -...

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I have a Craftsman 3 gallon 1HP air compressor that will only build pressure up to 25psi. The check valve was checked and looks ok. The pressure regulaor appears to be working ok. Bled off tank.The...


Sounds like the compressor has failed -- probably the valve -- tear down and rebuild is probably the solution, or replace compressor, or just buy another unit. My nature would be to tear it down and see what's going on.

Mar 22, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Air compressor won't go over 40 psi?


my ace air compressor which is 26 gallon 5 hp will not get over 60psi what is wrong with it please?

Feb 14, 2010 | Craftsman 1 Hp, 4 Gal. Air Compressor

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I have a 33g craftsmans air compressor oilless


have a 26 gallon air compressor , changed regulator switch but it still wont shut off

Feb 22, 2009 | Craftsman Air Tools & Compressors

1 Answer

Craftsman 25 gallon compressor wont cut off


The pressure switch has snap action contacts that are opened by a diaphragm pushing against a spring mechanism. Unplug the compressor and remove the cover to the switch and look for the contacts. Make sure that they are not welded together from use. Move the on/off lever to see if they open and close. You may have welded contacts or broken mechanism within switch. A factory replacement is expensive, however if you are a tinker-er you can use a lower price generic pressure switch available on ebay. Switches are sold by pressure range, you need a 120#. Fittings may need tweaking. Enjoy

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