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Peterbilt 379 box acting up.

Discussion in 'Peterbilt Forum' started by peterbiltproblems, Aug 23, 2016.

  1. Aug 23, 2016 #1
    peterbiltproblems

    peterbiltproblems Bobtail Member

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    Aug 23, 2016
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    Sometimes the box sticks and doesn't go up for down, I found that reactivating the PTO sometimes does it. It almost seems there is something up with the PTO as that seems to have no air going to actuator box in the cab. Any ideas?
     
    peterbiltproblems, Aug 23, 2016
    peterbiltproblems, Aug 23, 2016
    #1
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  3. Aug 23, 2016 #2
    AModelCat

    AModelCat Road Train Member

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    Are we talking about a regular body job dump truck? With those, the PTO usually has nothing to do with lowering the box as the lift cylinder only has 1 line (so gravity forces the box back down). The fact that you're having issues going both up and down makes me think you may have an issue with the control valve.
     
    AModelCat, Aug 23, 2016
    AModelCat, Aug 23, 2016
    #2
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