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APU problem!!!

Discussion in 'Trucks [ Eighteen Wheelers ]' started by trucker_maxwell, Aug 2, 2013.

  1. Aug 2, 2013 #1
    trucker_maxwell

    trucker_maxwell Bobtail Member

    18
    1
    Jul 4, 2012
    0
    My APU's alternator broke and when it broke it snapped the belt. Well i just replaced both the alternator and the belt and now the APU wont start. When I go to start the APU it makes like a loud buzzing noise and that is all it does. The APU is a carrier model and it sits on a 2009 International Prostar. Any helpful hints or suggestions would be greatly appreciated.
     
    trucker_maxwell, Aug 2, 2013
    trucker_maxwell, Aug 2, 2013
    #1
    DoneYourWay Thanks this.
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  3. Aug 2, 2013 #2
    Richter

    Richter Road Train Member

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    Philadelphia Pa
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    Did the belt go to anything else? Water pump seize up when it broke? Will the new alt turn by hand? Could be defective.
     
    Richter, Aug 2, 2013
    Richter, Aug 2, 2013
    #2
    DoneYourWay Thanks this.
  4. Aug 3, 2013 #3
    trucker_maxwell

    trucker_maxwell Bobtail Member

    18
    1
    Jul 4, 2012
    0
    Yea the new one turns by hand and i dont know what all the belt is hooked up to. Even if it was the water pump it still wouldnt start and it would make that buzzing noise?
     
    trucker_maxwell, Aug 3, 2013
    trucker_maxwell, Aug 3, 2013
    #3
  5. Aug 3, 2013 #4
    123456

    123456 Road Train Member

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    Perhaps it wasn't charging,

    and needs to be jumped off.
     
    123456, Aug 3, 2013
    123456, Aug 3, 2013
    #4
    DoneYourWay Thanks this.
  7. Aug 3, 2013 #5
    Richter

    Richter Road Train Member

    4,090
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    Feb 13, 2012
    Philadelphia Pa
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    If the water pump failed when the belt went, the engine could have sized up from over heat. Your not trying to start a motor that wont turn. If it were my apu, i would remove the starter and see if i can get it to run disconnected from the motor. Check with the manufacture, they can problay tell you what the buzz means. My guess is the starter cant turn because the motor doesn't want to turn.
     
    Richter, Aug 3, 2013
    Richter, Aug 3, 2013
    #5
    DoneYourWay Thanks this.
  8. Aug 3, 2013 #6
    Cranky Yankee

    Cranky Yankee Cranky old ######

    15,317
    210
    Jan 31, 2012
    Green Bay Wi
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    my TK tripac always buzzes before starting
    no error codes on display panel?
     
    Cranky Yankee, Aug 3, 2013
    Cranky Yankee, Aug 3, 2013
    #6
    DoneYourWay Thanks this.
  9. Aug 3, 2013 #7
    trucker_maxwell

    trucker_maxwell Bobtail Member

    18
    1
    Jul 4, 2012
    0
    No there are no error codes it just says STARTING then it just buzzes. When it was running it only buzzed for 3 seconds and then started up.
     
    trucker_maxwell, Aug 3, 2013
    trucker_maxwell, Aug 3, 2013
    #7
  10. Aug 3, 2013 #8
    Al^*

    Al^* Light Load Member

    152
    105
    Jun 5, 2010
    Kingsport, TN
    0
    I'd check the ground connections. The starter and alternator may share a ground, which is often overlooked when replacing one or the other.
     
    Al^*, Aug 3, 2013
    Al^*, Aug 3, 2013
    #8
    DoneYourWay and luvtotruck Thank this.
  11. Aug 3, 2013 #9
    luvtotruck

    luvtotruck Road Train Member

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    Jul 30, 2013
    Phoenix Arizona
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    Carrier Dealer? Maybe they can figure it out.
     
    luvtotruck, Aug 3, 2013
    luvtotruck, Aug 3, 2013
    #9
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