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Kobalt air compressor will not go above 80PSI

Motor/pump keep running forever but the tank pressure will not go higher then 80 psi, I can't hear any leaks when I turn it off.

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  • 6 more comments 
  • avandewaal Jul 24, 2009

    The unit is about 1 year old. I have used for an air hammer to remove stucco for my window replacement project so far i have replaced 5 windows.

  • avandewaal Jul 26, 2009

    tnx for all the comments, very helpful. In this model I can find the pressure switch, displayed here (part 0009)http://www.mastertoolrepair.com/vlk15826...

    is that the part you refer to as pressure valve? I checked the intake for the cylinder and there does not seem to be a filter, see same website for pics. Just want to make sure before I order new parts.

    thanks again.
    Arthur

  • avandewaal Jul 26, 2009

    tnx for all the comments, very helpful. In this model I can find the pressure switch, displayed here (part 0009)http://www.mastertoolrepair.com/vlk15826...

    is that the part you refer to as pressure valve? I checked the intake for the cylinder and there does not seem to be a filter, see same website for pics. Just want to make sure before I order new parts.

    thanks again.
    Arthur

  • avandewaal Jul 26, 2009

    keeps going.

  • avandewaal Jul 27, 2009

    The fault is in the motor? the motor runs fine, or do you mean the pump/cylinder? I suspect the piston/compression ring is faulty, however there are no spare parts for that piece. i can take it apart by myself but don't know what to look for. Do you think the pressure switch is OK?

  • avandewaal Jul 28, 2009

    hi there any comments?

  • avandewaal Jul 31, 2009

    Since the phone number in the kobalt manual was not working,I called Lowe?s, they gave me a phone number of the manufacturer. The company which made my kobalt went bankrupt and they were taken over by this other company however the warranties were not included. Called lowe's again, they were very friendly and escalated the issue to a manager. A few hours later I got a call from my local lowes store, they told me that had set aside a similar compressor which I could pickup. I went to the store and Lowe's offered me a full store credit refund, which I used to buy a new compressor. I decided not to buy a kobalt but spent a little more and bought a Dewalt. Thanks Lowe's, that is customer service!

  • avandewaal Jul 31, 2009

    Since the phone number in the kobalt manual was not working,I called Lowe?s, they gave me a phone number of the manufacturer. The company which made my kobalt went bankrupt and they were taken over by this other company however the warranties were not included. Called lowe's again, they were very friendly and escalated the issue to a manager. A few hours later I got a call from my local lowes store, they told me that had set aside a similar compressor which I could pickup. I went to the store and Lowe's offered me a full store credit refund, which I used to buy a new compressor. I decided not to buy a kobalt but spent a little more and bought a Dewalt. Thanks Lowe's, that is customer service!

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  • Master
  • 867 Answers

If this is an older or much used unit, cylinder/piston may be worn, unable to push higher psi, which would explain no leaks. if newer unit, seems like regulator unit/valve faulty

Posted on Jul 24, 2009

  • 2 more comments 
  • bozcro
    bozcro Jul 25, 2009

    the regulator pressure valve just off the cylinder is not working good, needs to be replaced. but just in case all that dust from stucco may have clogged the air intake filter. try removing filter and see if pressure builds up

  • bozcro
    bozcro Jul 26, 2009

    after reading everything carefully, one more question. does the pump ever stop? stop at 80 or just keeps going?

  • bozcro
    bozcro Jul 26, 2009

    i checked all the data, if motor keeps running, no leaks, the fault is in the motor, part no 12, but it does not need replacing, your motor has a problem, it needs to be checked out, its a small part with in the motor, rather than buying a whole motor assembly, i would recommend having it repaired rather than spendind the 250$+. i looked over the drawing you supplied, motor is in one large segment.

  • bozcro
    bozcro Aug 01, 2009

    im glad you got your money back, this unit needed a internal motor repair, so this was the best possible outcome

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