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

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Leaking oil Soonest I rtart the air compressor the oil is comming from 2 saffty holes in oil cover.

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  • kent318 Apr 06, 2009

    same here oil leaking out of oil fill cap.

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You may simply have too much oil in the chamber. 

Posted on Jan 17, 2009

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Posted on Jan 02, 2017

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How can i fix my ec12 hitachi electric air compressor


This problem is caused by either the starter capacitor or the in-tank check valve. Ez to check. With no air in tank, start compressor; if motor hums or has difficulty suspect capacitor. If motor starts, partially fill tank and unplug the power. Check for air leaking at the pressure switch or air coming out of the air inlet (remove the air filter). If air leaking, replace check valve. If no air leaking, again let out all the from the tank and connect power. Allow the compressor to fill and shut-off. After the compressor fills, again listen for air leaking from the pressure switch unloader valve. If air continues to leak from unloader, replace the check valve. Good luck

Jun 11, 2015 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

My craftsman air compressor #919176820 2 HP 12 gallon 200 max psi will not compress over 125 psi


If your compressor is oil-less type, most likely pressure is leaking past piston ring. To verify, remove cover to expose bottom of cylinder (unplug compressor and let out all air). With flashlight, examine the upper-most part of the cylinder (turn motor by hand till piston is at top of stroke). If top of cylinder is scratched, then pressure is leaking past.
For many years now, stores are in a race to have more HP and PSI to attract customers. Customer is really the loser because components used to make the units can not handle the higher pressure. Normally small 115v compressors are set to cut out at 125psi and larger two stage units will cut out at 160psi. Small compressor set to 200psi makes for short lived compressor. Could be compared to driving your car at 100mph all day every day. Longest life is attained when unit is being used at about 60 to 75 % of capacity.
To allow your compressor to reach cutout pressure and keep working for a while, lower cutout to 120psi (pressure switch may be adjustable). To restore to 200psi, replace cylinder/ ring.
If your compressor is oil type, suspect leaking reed valves.

Nov 27, 2011 | Ingersoll Air Tools & Compressors

1 Answer

Head gasket leak but I found out that this part is no longer made due to non production its a centeral pneumatic oil less air compressor 99781,I was letting my air compressor build up air pressure when I...


If it is a head gasket leak and no gasket available. I would make one. You will need to buy a piece of high temp gasket material like garlock and it needs to be the correct thickness as the old material/gasket. Remove the old gasket and trace out a new one and cut it out. Or you can locate 2 bolt holes one on each side of the head put 2 holes in the material and use the bolts to hold it in place. Use a small hammer and tap around the edges. If done correctly while tapping it will cut the material. you can do bolt holes, the complete gasket like this.

Jul 17, 2011 | Air Tools & Compressors

1 Answer

I've got a compair 660A air compressor and have oil leaking out of the body of the oil pump cover.


I didn't think this was a pressure lubed machine. Is it leaking around the shaft seal, behind the flywheel? If it's just the oil leak, and the unit runs/sounds fine otherwise, you could put a gasket and seal kit in it.

You can search online for parts, but probably have better luck calling it a LeRoi 660A. Compair bought them years ago, and let the piston compressor business slowly die.

Mar 15, 2011 | Air Tools & Compressors

1 Answer

The oil dip-stick is blown out of its seat when the compressor runs


Without knowing what make or model you have, check the following:

1. Some, not all, compressor dip sticks have venting holes for the crankcase. If the vent holes are plugged or the check ball is stuck the dip stick will get forced out when the piston comes down.
2. Make sure the oil level is where it's supposed to be. Too much oil in the crankcase will cause the motor to work harder and the excess oil being splashed around the crank case can overwhelm the vents in the case or dip stick and again blow the dip stick out.
3. Worst case, you have worn or broken rings on the piston(s), a hole in a piston or a badly scored cylinder(s) and air is leaking past the piston and creating pressure in the crank case and blowing the dip stick out.

Jan 26, 2011 | Campbell Hausfeld Air Tools & Compressors

1 Answer

The motor is running. Belts and pulleys are turing. oil level is good. No leaking from tank or conectionslbs. Motor runs contiuously tank Air pressure will not rise above 25-50.


While the compressor is running and has reached point of not attaining higher pressure remove air filter and place your gloved finger over the intake hole (be carefull may be hot). If compressor is working properly you will feel suction, if however you feel air blowing out of intake most likely blown head gasket /s and or broken reed valves. Easy to fix however, look for parts at mastertoolparts.com

Nov 03, 2010 | Coleman 6.5hp - 80 Gallon Vertical ASME...

1 Answer

Compressor pumps up fine but then leaks air just below the relief valve. out of a small factory hole in a brass fittting and goe down till compressor starts again.


When the unloader leaks as you describe indicates that the check valve is leaking. Easy to check the condition of the valve. Follow air discharge line from compressor head to tank. The brass or steel fitting that threads into tank is the checkvalve. Remove all air from tank and remove large inspection cap to reveal the teflon seat. If it is cracked or swollen you will need to replace the valve. Parts available at www.toolpartsdirect.com Good luck

Sep 25, 2010 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

Fan stops and is hot then cools down and starts again,compressor always going


DO NOT LET THIS UNIT CONTINUE TO RUN WHEN THE FAN IS NOT RUNNING. IT WILL RUIN THE COMPRESSOR. MOST LIKELY, THE FAN MOTOR IS BAD AND NEEDS TO BE REPLACED.IF YOU HAVEN'T DONE ANYTHING ELSE TO THE UNIT TO CAUSE A PROBLEM, BEFORE REPLACING THE MOTOR, CHECK IT TO MAKE SURE IT IS NOT COVERED IN DIRT. IF IT IS, JUST WIPE IT ALL OFF WITH A RAG MAKING SURE YOU CLEAR THE AIR HOLES ON THE MOTOR. ALSO, SOME MOTORS HAVE OIL HOLES (2). YOU COULD ALSO TRY OILING IT BEFORE YOU REPLACE THE MOTOR.

Jul 05, 2010 | Heating & Cooling

2 Answers

Clutch leaking oil?


ON OIL LEAKS IVE BEEN A CERTIFIED MECHANIC 40 years plus i have 2 issues to add yo fix ya they would be oil and gas leak issues gas leak can ruin motor my fix dissasemble fuel petcock remoce tiny o ring and spring carefully dril 2 more holes opposite 2 hole allready there dissconect vacum now add xtra t valve with manual cut off gasleak prblem fixed oil leaks if oil leak is persistant by that i mean you just see oil after sitting over nite minimum amount go to a hier i use 20/50 non syn thetic oil but live in so florida so it depends on owners location good luck signed suzuki750 owner

May 19, 2010 | 1999 Suzuki GSX 750 F (Katana)

2 Answers

The check valve is leaking on my stanley bostitch cap2000p air compressor.I was trying to take it out to check it or replace it,but,it was so tight in there it broke off while trying to get it out. I need...


If you are talking of the clamshell cover, MANY plastic covers big and small have a few screws and then have molded "rods" on one side and a mating hole in a boss on the other. For these, one has to CAREFULLY pry them apart EVENLY so all seperate evenly..

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