Question about Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k

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Valve plates installed wrong

1.5 hp crftsmn horizontal oil run compressor,I don't remember wich way the 2 valve plates go is there a diagram I can look at .Thank,Mangirl

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Try this one and you can download an owner's manual from that page that has an expoded view of the compressor disassembled for parts identification Not sure if it's the right compressor,, closest I could find

Posted on Nov 20, 2008


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1 Answer

My model number 91965110 compressor runs but won't fill the tank

More then likely it is either in the valve plate (bad flapper valve or gasket) or the piston and sleeve have worn out which is usually from scoring. You will see that when you take the head off to inspect.

Aug 15, 2012 | Craftsman 33 gal Air Compressor 6 hp...

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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.

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

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I have a Craftsman compressor Model # 919-15292 2. The compressor stopped building pressure because air was continually being released through the unloader valve. I have replaced the unloader valve,...

you must have wired the new pressure switch incorrectly .when the pressure switch opens it will release the head pressure so your compressor must be running with the pressure switch contacts open should be 4 connections 2 marked motor which is from your compressor and 2 marked line which is your power coming in

Jun 15, 2011 | Craftsman 33 gal Air Compressor 6 hp...

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Kicking braker out

Check valve is bad creates high head preasure. $12-14 + shipping. Go to sears web sit to find part on diagram. Takes less than 30 min. to install. I had same problem a valve fix ed it.

Nov 19, 2010 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

I have a dewalt air compressor model d55155 will not bulte up any presure changed the cold start valve and the reed valves but not the reed valve plates it seemes like like now i have air coming out the...

If you have oil coming out of the oil fill and dip stick you most likely installed the reed plate upside down. Usually it says this side up or there is an arrow pointing up on the reed plate.
This is a good sketch of compressor and reed valve assy.

Usually the reeds are on top of the plate facing downward. If you have just a reed disc.. then the disc will need to be inverted.

Thanks for Choosing FixYa.


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How to change oil on 1.5 hp,2 gal. air compressor

run the machine until it fills up then unscrew drain plug on front or underneith pump unit once drain replace plug and unscrew filler plug and fill with oil till it comes 1/2 full on sight glass or touches line on dipstick done

Sep 26, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Check valve

I have replaced countless checkvalves that were stuck open due to debris produced/ejected by the compressor. Most frequent problem was carbon deposits due to wrong type of oil in compessor. The carbon deposits form inside head and discharge hose. All carbon must be cleaned from head and hose when new checkvalve is installed. Use synthetic oil in compressor to prevent carbon deposit. Leaky valves and gaskets in the pump will also casue problems because this greatly increases the air temp discharged from the compressor. I use checkvalves pruchased from and not the sears valve. Good Luck

Jan 14, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

No air pressure

Think I already answered this for a Craftsman 1.5 pancake, or was referred to as horizontal, was that you ? If not then put in a search for your brand and hp and type of compressor and go to the web page for it and scroll down looking for the owners manual which will have an exploded view of the compressor dissasembled for parts identification but you should be able to see what you need to know. It's probably an Adobe file download.

Nov 18, 2008 | Air Tools & Compressors

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