Dump Box Trouble

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by RichardsTrucking, Sep 18, 2014.

  1. RichardsTrucking

    RichardsTrucking Bobtail Member

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    Sep 18, 2014
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    Once my PTO is engaged my dump box won't go up as it normally did... It goes up very very slowly, I have to accelerate the truck so it can keep going, but it still goes up slowly... When it comes down it comes down as it normally would, pretty fast. I checked the oil... Any one have any thoughts of what it could be? Please help me out. :biggrin_25524:
     
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  3. bad-luck

    bad-luck Road Train Member

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    Baltimore, Maryland
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    Check the filter. Sounds like there is a restriction somewhere. Also make sure that the pto is engaged all the way
     
  4. sirstealth

    sirstealth Bobtail Member

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    Nov 22, 2013
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    Had something similar happen because the cable on the dump lever became partly disconnected so even when the lever was fully up it was only going up at a snails pace unless you hammered the accelerator.
     
  5. 201

    201 Road Train Member

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    high plains colorado
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    If it's not the up/down control, it might be the pump is worn. Got to be a pressure test on the out line you can try.
     
  6. poppapump1332

    poppapump1332 Road Train Member

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    birdsboro,pa
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    Sounds like the pump is weak probably need to replace it
     
  7. j_martell

    j_martell Light Load Member

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    Centre Wellington, Ontario
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    If a gear driven pto, it's either in or out....if it were slipping, you would know....partial engagement will still spin the pump, and eventually #### the gearing.....
     
  8. Chewey

    Chewey Light Load Member

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    Can you hear the bypass valve?
     
  9. hotrockhauler

    hotrockhauler Bobtail Member

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    Sep 28, 2014
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    Sounds like your pto is worn out. new? old? Ever leave it on and drive down the road? high rpms will burn it right up. if new and never got too hot could be clogged oil supply line/fitting ect... usually if in need of bleeding they bounce coming down good luck!
     
  10. Rodeo_Joe

    Rodeo_Joe Light Load Member

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    Oct 24, 2008
    Blackstock, Ontario
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    I'd say its your up/down control not allowing much pressure for your up, is it a cable control rod or air?
     
  11. Caterpillar Cowboy

    Caterpillar Cowboy Heavy Load Member

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    Nov 11, 2010
    Wyoming
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    Another thing, getting to be that time of year how cold is it where you're at? Get enough water in the system and it will freeze at the low spot, which is usually in or before your PTO pump on the transmission, therefore cavitating your pump and tearing it up.
     
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