Question about Craftsman Air Tools & Compressors

1 Answer

Craftsman air compressor 921.153101 has has intermittent trouble starting during regular use. Tries to run but can't get up to speed.

Posted by on

1 Answer

  • 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.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 334 Answers

Shorten the cord or use a father one. Typical for voltage drop in loaded motors.

Posted on Aug 10, 2017

6 Suggested Answers

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,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1383 Answers

SOURCE: air compressor flips breaker before it will start?

Air compressors tend to draw more power as they age, however, will not trip breaker unless some malfunction. Here are some simple tests. Unplug compressor and turn the pump by hand, you may have to remove a cover to do this. It should turn freely; any resistance could be failing bearing (would make noise) unloader/check valve leaking allowing back pressure to pump, or failed start capacitor/start winding. Easy test for checkvalve. With pressure in tank loosen discharge hose at tank and check for air leak. Check valve should hold pressure in tank. Replace as needed. Failed capacitor/s will cause high amp draw. Remove from circuit and test. UF reading should be within 95% of printed rating. Finally, most air compressor motors have two windings, start and run. Power to windings is controlled by flyball switch inside rear of motor. This switch has contacts that can stick in start position and cause high amp draw. Examine windings for signs of overheating. Copper windings generally have color of new penny. Very dark brown windings bad news. Gook luck

Posted on Jan 06, 2009

  • 333 Answers

SOURCE: Craftsman 6hp 150psi 30gal won't keep running

It sounds like the internal circuit breaker in the motor is heating up and then the breaker trips to shut down the motor. This is the protection so you don't have a fire if the motor burns up. The smell you have is the coils in the motor. Sorry to say that you will need a new motor for this unit. I hope this helps out.

Posted on Jan 17, 2009

  • 1383 Answers

SOURCE: Craftsman Compressor runs Intermittantly

I have repaired many craftsman compessors with the problem that you are having. I just use the process of elimination to find the broken wire. I use a short pigtail and attach it to the motor side of the pressure switch. This will isolate the motor from the switch and the power cord. Use caution not to overfill the compressor as this will test the safety valve. If the motor runs ok then move the pigtail to the powercord side of the switch. This will eliminate the power cord. If problem is within the motor check the connectors under plate and capacitor cover. To test the capacitor you will need to find a meter with cap test capabilities or repair shop will test for free. The cap should test within 95% or printed value in (uf). If all parts test ok then motor could have internal thermal breaker that is weak. Good luck.

Posted on Jan 23, 2009

lester482529
  • 226 Answers

SOURCE: no air pressure

TRY ADJISTING THE TANK PRESSURE KNOB WHILE RUNNING ,TURN TO THE RIGHT 1/4 TURN UNTILL YOU SEE NEEDLE MOVE .MOST TIMES FACTORY SETS AT 0,SO YOU NEED TO ADJUST IT .MY ADVICE IS NO MORE THAN 90-100 PSI TILL YOU KNOW WHAT YOUR RUNNING MORE OFTEN

Posted on May 27, 2009

  • 5603 Answers

SOURCE: Have a Craftsman Professional 150 PSI 25 Gal 1.8

Sounds like one of the following three possibilities:

Too small of service to the unit... You need 20 amp and #12 wiring.

Too long extension cord with too much voltage drop.

The "unloader" is defective. This is a little valve that MAY be a part of the pressure switch that bleeds cylinder head pressure at shutdown to make starting easier. At shutdown you can usually hear it "exhale".

Posted on Sep 09, 2009

Testimonial: "Thanks Gives me good ideas to try."

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Have Craftsman 6.75 lawn mower, briggs Stratton engine. How do I adjust running speed ??


Are you familiar with governor speed regulators on engines? There is a flap on a hinge under the flywheel cover which is moved by the air fins on the flywheel, which tries to close the throttle. There is also a spring that tries to open (increase) the throttle. So it's a contest between those two opposing forces! Increase the spring tension, and you will have more speed. But don't overdo it, or you could blow your engine! Good luck!

May 12, 2017 | Craftsman Garden

1 Answer

I have a Craftsman (919.176820) 2HP, 12 gal. compressor. I starts fine the first time, it reaches full pressure and cuts off. When the pressure drops and it tries to start again, the motor lugs and trips...


Your tank check valve is stuck/broke. It's on the tank end of the line from the pump to the tank. It is supposed to close when the pump stops to keep air in the tank and let the system bleed pressure out of the pump so the motor can start when there is pressure in the tank. The part you need is CAC-437-2 and is available through searspartsdirect.com.

Feb 22, 2012 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

Compressor starts innitially,then when pressure gets low it trips breaker when it tries to start back up.20 amp breaker to light switch to compressor is about 2o ft on12-2 wire. tried 30 amp breaker,does...


the start capacitor on the motor body is weak,the motor needs this component to over come the air pressure when cycling to re-build the low air pressure,change both the start and run capacitors when doing the start because the other run capacitor is just as old and it will soon fail

Mar 19, 2011 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

My friends Craftsman air compressor stopped running


The compressor in question is basically a throw away.
My personal opinion is it's more trouble then it's worth.
Even after it's fixed you still have a throw away compressor.
However it is possible to repair it if the parts are still available.
Check out the link below for parts and diagrams for the compressor in question.

Hope this helps and good luck.

http://
www.mastertoolrepair.com/-c-271_535_537.html
http://www.mastertoolrepair.com/

Jun 10, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Compressor motor only comes on and fills tank when tank is empty. When tank has any pressure it tries to start but stops.


there is a valve under the regulator, at switch off pressure the valve must blow of the air between cilinder and checkvalve after stop running.. when checkvalve is not closed it keeps blowing.

Feb 05, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Have craftsman 1hp motor with two capacitors,


you posted this under dryer problems , but i give it a shot. Maby your compressor is out of oil or rings worn out and its to tight to turn under pressure. Or your not getting the voltage or amps you need. You cant run on a extension cord or at least a cheep cord. Your plug is or outlet is burnt not tranphering volts and amps.

Nov 21, 2009 | Maytag Neptune MDE5500AY Electric Dryer

3 Answers

Compressor tries to turn on but takes a while


weak comperessor you need to test it first...or you may have something that jaming the fan

Sep 11, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Compressor tries to turn on but cant.


Try changing out the start up and run capacitors for the compressor.

Jun 24, 2008 | Coleman Mach 15 Air Conditioner

Not finding what you are looking for?
Air Tools & Compressors Logo

Related Topics:

377 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1383 Answers

JOHN LAPIER

Level 3 Expert

2422 Answers

Joe Garcia
Joe Garcia

Level 2 Expert

205 Answers

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

Answer questions

Manuals & User Guides

Loading...