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air compresor problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bulldog3280, Aug 1, 2009.

Page 1 of 2
  1. Aug 1, 2009 #1
    bulldog3280

    bulldog3280 Bobtail Member

    6
    0
    Aug 1, 2009
    MARION,NC
    0
    hows it going,new to the forum,just need some sugestions,my compresor will not turn off it builds pressure way beyond 120PSI most of the time it gets up to 140,I am new to truck ownership,and have spent all my savings,i can rip a car apart and put back together,but a little lost on diesel mechanics,need a little help,have already changed govenor,whats my next step Thanks
     
    bulldog3280, Aug 1, 2009
    bulldog3280, Aug 1, 2009
    #1
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  3. Aug 1, 2009 #2
    Working Class Patriot

    Working Class Patriot Road Train Member

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    Wherever and Whenever...
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    Working Class Patriot, Aug 1, 2009
    Working Class Patriot, Aug 1, 2009
    #2
  4. Aug 1, 2009 #3
    05chopper

    05chopper Light Load Member

    169
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    Dec 25, 2008
    USA
    0
    Does the new governor have a rubber plug on top of it? If it does remove the rubber cap loosen the nut and turn the slotted screw.I first remove all the air from the air tanks then adjust the 120psi setting. Do you have an air dyer on your truck? Check air line from the governor to the air tank to see if its plugged too!
     
    05chopper, Aug 1, 2009
    05chopper, Aug 1, 2009
    #3
    bulldog3280 Thanks this.
  5. Aug 1, 2009 #4
    black_dog106

    black_dog106 Road Train Member

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    unloader valve???
     
    black_dog106, Aug 1, 2009
    black_dog106, Aug 1, 2009
    #4
    bulldog3280 Thanks this.
  7. Aug 2, 2009 #5
    Brickhauler

    Brickhauler Medium Load Member

    411
    142
    Oct 1, 2008
    Elizabeth CO
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    Like the others say, the governor is bad or one of the small lines that lead to it is plugged. Its about 4" tall and 2" around and usually bolted to the compressor. Make sure you drain the air tanks and don't mess with a rebuilt one. A new one is only about $30 bucks
     
    Brickhauler, Aug 2, 2009
    Brickhauler, Aug 2, 2009
    #5
    bulldog3280 Thanks this.
  8. Aug 2, 2009 #6
    black_dog106

    black_dog106 Road Train Member

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    don't mess with a rebuilt one.

    good advice..:yes2557:
     
    black_dog106, Aug 2, 2009
    black_dog106, Aug 2, 2009
    #6
    bulldog3280 Thanks this.
  9. Aug 2, 2009 #7
    Heavyd

    Heavyd Road Train Member

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    Make sure you did not switch the lines to the governor by mistake. The line that goes somewhat in the middle of the valve goes to the air dryer, and the line that is somewhat at the end of the valve will go to the first tank. The line to the tank must not be kinked, this is the line that senses system pressure and will trigger the governor to signal the compressor to stop pumping and dryer to purge.
     
    Heavyd, Aug 2, 2009
    Heavyd, Aug 2, 2009
    #7
    bulldog3280 Thanks this.
  10. Aug 3, 2009 #8
    bulldog3280

    bulldog3280 Bobtail Member

    6
    0
    Aug 1, 2009
    MARION,NC
    0
    thanks for all the advise,the air line that comes from the compressor to the air dryer,came loose under the truck,i put it back together,now the air dryer does not let it go past 120 but the compressos is still running and the air dryer releases air every 10 to 15 seconds, any sugestions on the next step.Thanks
     
    bulldog3280, Aug 3, 2009
    bulldog3280, Aug 3, 2009
    #8
  11. Aug 3, 2009 #9
    starcommander

    starcommander Light Load Member

    131
    100
    Mar 6, 2009
    Small Town, Southwestern Ontario
    0
    Maybe try another governor. And if the governor is new does not neccesarily mean it is working properly. JMHO
     
    starcommander, Aug 3, 2009
    starcommander, Aug 3, 2009
    #9
    bulldog3280 Thanks this.
  12. Aug 3, 2009 #10
    bulldog3280

    bulldog3280 Bobtail Member

    6
    0
    Aug 1, 2009
    MARION,NC
    0
    blackdog106,could you tell me would the unloader valve be located under the cab,attached to the tranny,I drive a 89 international 8400,i realy appreciate the help i am getting,I bought this truck as my first knowing i would have to work on it,but this is the only problem i am having other than putting new steers and 4 drives.Thanks
     
    bulldog3280, Aug 3, 2009
    bulldog3280, Aug 3, 2009
    #10
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