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

2 Answers

Builds pressure, will not cycle back on and leaks fluid

I have a 33 gallon craftsman air compressor 6hp model number 919.167342. It builds pressure up to around 140psi in the tank then shut off and would not cycle back on. Motor spins freely (it is an oil free motor) but there is a oily substance leaking from the rear cover, followed with an akward smell. I pulled the cover off and nothing appears melted but there is smoke coming from inside the cover. Compressor still spins but just hums when you put power to it.

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Craftsman Master
  • 1,388 Answers

Your compressor is most likely made by Campbell Hausfeld. The oily substance could be leaking from the capacitor on the motor. Remove the cover and examine the capacitor for failure. There is a value printed on the cap. (uf) The cap must measure to within 95% of printed value. A failing capacitor will cause the hum that you are experiencing.

Posted on Dec 27, 2008

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 89 Answers

CAPACITOR SOUNDS LIKE THE OIL PROBLEM. BUT THAT COULD HAVE GONE BAD BECAUSE: IS THE COMPRESSOR "UNLOADING". HISSING AIR OUT WHEN SHUTTING OFF SO IT DOESNT TRY TO START BACK UP UNDER A LOAD. IS YOUR COMP. WIRED FOR 115V OR 230 VOLT (LOW VOLTAGE OR HIGH VOLTAGE) AND DOES YOUR POWER MATCH IT. ARE YOU RUNNING WITH TOO SMALL GAUGE WIRING OR DROPCORD. USE #12 OR #10 CORD. IF YOUR COMP. IS TOO SMALL FOR THE JOB THEN IT RUNS TOO MUCH AND THE MOTOR GETS HOT. THE CAPACITOR IS USUALLY ON TOP OF THE HOT MOTOR.

Posted on Dec 27, 2008

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 3 gal craftsman air compressor. Compressor runs but will not build more than 20 psi in tank reserve. Whats wrong?


if shuts down at 20 psi regulator is set wrong
it runs but only builds 20 psi, compressor is probably worn out

Oct 03, 2015 | Craftsman Air Tools & Compressors

1 Answer

I have a 6hp 33 gal aircomp i builds up to 100 should go to 250 wont shut off because not up to press can you help


Sounds to me likt you have a bad motor, or compressor. The compressor rings might be leaking by only holding 100 psi.

Aug 10, 2012 | Craftsman 33 Gallon Vertical Portable Air...

1 Answer

When the unit is on and building pressure, the safety valve goes off before it reaches the factory set 150psi pressure. I then lose most of the air and it starts over until the safety valve releases again...


The pressure switch (on / off switch) must be adjusted or has failed. A qualified Bostitch Technician can determine if the switch can be adjusted or must be replaced. Each model is different and without the model number I cannot give you a more precise answer.

May 15, 2011 | Stanley NEW Bostitch 2 HP 6 Gallon...

1 Answer

I have an older 33 gallon horizontal craftsman compressor. In December I turned the compressor on in my unheated garage when the temp had been in the 20's for days. It seemed to run normally at first. Then...


It sounds like the pressure safety valve could be acting up. It is designed to open when the tank pressure it too high and they don't always reset until the pressure is down to nothing. Some models have them included on the gauge manifold and some on the top of the tank under the cover. It is also possible that the upper limit on the motor switch is set a little too high which would also cause the valve to "pop" before the compressor shuts off.

Mar 18, 2011 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

My 33 gallon air compressor will at start build up to 120 psi and shut off, after use and at about 80 psi the motor tries to start but kicks our circuit breaker? Any help would be greatly appreciated!


Most likely it is the unloader valve. This is inline with the air filltube from compressor to tank. Somestimes the unloader valve is screwed into the tank and air tube is attached to it. This device takes the pressure out of the tube so the compressor can start without the back pressure from in the tank. Other possibility, the start capacitors of the motor. The capacitors must give a kickstart upon startup or the motor will just hum for a couple seconds and overload the breaker. A tempoary solution is to turn off the power to compressor when it reaches 120psi, then allow the pressure to drop to 40 or less, then turn power on and mostlikey compressor will start with a load of 40psi or less. It is a nuisance but it works until you replace the bad part. Goodluck,Macgivor

Jan 16, 2010 | Craftsman Air Tools & Compressors

Not finding what you are looking for?
Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k Logo

341 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1388 Answers

JOHN LAPIER

Level 3 Expert

2528 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Craftsman Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...