How to uncouple a trailer... for dummies

Discussion in 'Experienced Truckers' Advice' started by Kyle G., Aug 25, 2020.

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  1. mitrucker

    mitrucker Road Train Member

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    Knight didn’t believe in air dump on their trucks.
     
    mitrucker, Aug 26, 2020
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  2. Studebaker Hawk

    Studebaker Hawk Road Train Member

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    I would bet that dump valves and trolley brakes are 2 items left off of most tractors in large fleets. The number of those drivers who use both incorrectly, going merrily down the road with the suspension in the lowered(dump) mode destroying the entire driveline, and then slowing an 80K truck on dry pavement and flat spotting the tires was way more than their fleet maintenance departments could stomach.
     
    Studebaker Hawk, Aug 26, 2020
    #32
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  3. rachi

    rachi Road Train Member

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    Common for the mega fleets. Big ole' Marten Transport didn't have an air dump on their Trucks.
     
    rachi, Aug 26, 2020
    #33
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  4. Brettj3876

    Brettj3876 Road Train Member

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    Or if they still have it there's no applying 10-15 it's either 0 or full on lock em up Lol
     
    Brettj3876, Aug 26, 2020
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  5. Long FLD

    Long FLD Road Train Member

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    With a loaded pneumatic it was 25 low gear turns once the legs made contact with the ground.
     
    Long FLD, Aug 26, 2020
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  6. p608

    p608 Road Train Member

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    I drove for 36 years and never "had" to use a Johnny bar, did I, yes on occasion or pretriping or hooking a set.
     
    p608, Aug 26, 2020
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  7. Brettj3876

    Brettj3876 Road Train Member

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    Pulling someone else's wagon Lol gets used all the time. Why use my drums
     
    Brettj3876, Aug 26, 2020
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  8. Jenn72

    Jenn72 Medium Load Member

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    My 2020 Cascadia doesn't have an air dump. I hate it!!
     
    Jenn72, Aug 26, 2020
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  9. rachi

    rachi Road Train Member

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    Yeah, no Johnny bar on marten trucks either.
     
    rachi, Aug 26, 2020
    #38
  10. skellr

    skellr Road Train Member

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    If only it were that simple..
     
    skellr, Aug 26, 2020
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  11. Kyle G.

    Kyle G. Road Train Member

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    Wow, ok. I must be living in a cave, I had no idea so many trucks didn’t have a dump valve. Pardon my ignorance on that.
     
    Kyle G., Aug 26, 2020
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