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2000 Mack RD688 interlock problems

Discussion in 'Mack Forum' started by skillet01, Nov 6, 2013.

  1. Nov 6, 2013 #1
    skillet01

    skillet01 Bobtail Member

    1
    0
    Nov 6, 2013
    0
    We have a problem with one of our dump trucks. The interlock would not engage yesterday, changed the
    air switch up on the dash and it sounded like it started work again. We could hear the interlock engage and
    disengaged when the switch was flipped. Figured it was good to go, but come to find out the truck will not
    move now when the switch is in the disengaged (unlocked) position. The drive shaft is spinning but the front
    rear end has no power. Truck will not move.
     
    skillet01, Nov 6, 2013
    skillet01, Nov 6, 2013
    #1
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  3. Nov 6, 2013 #2
    chalupa

    chalupa Road Train Member

    3,757
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    Jul 22, 2010
    Houston,Texas
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    U broke the thru shaft ( or your driver did ) . it's a small shaft with splines on both ends and it transfers power through the pdl to the rear axle. When you engage the pdl it locks in the front driver to the power shaft.

    What kind or rear end? Mack, Rockwell? It's not a hard fix either but i don't know what that shaft costs anymore.

    Don't use the truck on the pdl either cept to move it into the shop. Cost you alot more later.

    Good luck
    JMO too.
     
    chalupa, Nov 6, 2013
    chalupa, Nov 6, 2013
    #2
  4. Nov 10, 2013 #3
    Cetane+

    Cetane+ Road Train Member

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    Sep 29, 2013
    Albany, NY
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    or just an axle. Pop the front axles out, you will know then.
     
    Cetane+, Nov 10, 2013
    Cetane+, Nov 10, 2013
    #3
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