Trailer "jumps/hops/skids" When Braking Empty/Light Load

Discussion in 'Experienced Truckers' Advice' started by KWP_15, May 22, 2020.

  1. daf105paccar

    daf105paccar Road Train Member

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    Has anyone off you ever put a pressure gauge on their problem trailer?
     
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  3. KWP_15

    KWP_15 Bobtail Member

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    I'm taking it into the shop tomorrow, I'll keep you guys posted on what the problem is!
     
  4. Snailexpress

    Snailexpress Road Train Member

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    I did. everything was within specs.
     
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  5. black_dog106

    black_dog106 Road Train Member

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    Doesn't air ride have shocks??? Never seen one that didn't. Seems no shocks on air ride suspension would make for a brutally bouncy ride? Please correct me if I'm wrong!
     
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  6. daf105paccar

    daf105paccar Road Train Member

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    It is a newer design off airbag.
    I read about it a while back.
     
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  7. uncleal13

    uncleal13 Road Train Member

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    Hendrickson - ZMD - Zero Maintenance Damping
     
  8. FoolsErrand

    FoolsErrand Road Train Member

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    Put a 2x4, pipe or piece of dunnage up against the tire treads and try to lever them around. If you can shove an axle fore or aft look closely at the trail arm bushings.

    Also, were all the drums definitely replaced with new? Or was a few changed, a few left old and all the slacks tightened up?

    A warped old drum with tight adjustment will grab on the "high spot" so to speak and that torque is transmitted into raising the trailer.
     
  9. Woodys

    Woodys Heavy Load Member

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    Get the abs checked, this almost always happens when I pull a trailer with a faulty ABS. It feels like the brakes pulse when you hit them. Especially dangerous when your loaded and need to stop quick and your brakes are only at half power.
     
  10. KWP_15

    KWP_15 Bobtail Member

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    Mar 8, 2019
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    Thanks for everyone's suggestions! It turned out being the valve. The shop replaced valve again, and put oem in this time! I guess oem is the only way to go for air valves and abs equipment!
     
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