Braking Issues

Discussion in 'Trucks [ Eighteen Wheelers ]' started by MX127, Dec 24, 2019.

  1. MX127

    MX127 Bobtail Member

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    Okay, I will. Does the pedal valve seem to stay loaded after releasing foot pressure, then going for another stroke? That's how it feels for me, as if it holds that lockout point while attempting to relieve psi off the drums and reapplying the brakes, "brake release lag"?
     
  2. woolybully35us

    woolybully35us Medium Load Member

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    when mine froze up it was like I had no breaks then all the sudden I had to much break
     
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  3. Michael 247

    Michael 247 Heavy Load Member

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    How can you know that a spring is broken inside a brake chamber
     
  4. MX127

    MX127 Bobtail Member

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    That's a good question, unfortunately, I didn't have a opportunity to ask the technician that made the report.

    However, I believe they can be disassembled or possibly a scope can be inserted through the center of the housing, but honestly I don't know how he discovered it.
     
  5. SmallPackage

    SmallPackage Road Train Member

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    Lotta times you’ll hear it “THUD” loud or make a different sound than the others when you set the brakes.
     
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  6. snowwy

    snowwy Road Train Member

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    I'm talking about the brake spring. Not the chamber spring.

    Worn out brakes and drums cause the shoes to spread too far and the return spring breaks.
     
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  7. baha

    baha Road Train Member

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    Also CK the thickness of brake shoes on truck now,I bought a truck with the wrong shoes put on and they were 1/2 as thick as the right ones, it was caming over after 1 mo. of use?
     
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  8. MX127

    MX127 Bobtail Member

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    Copy
     
  9. SmallPackage

    SmallPackage Road Train Member

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    To add to this. If the spring brake chamber push rod cleavis is unpinned from the slack adj. You will be able to sometimes push in the rod and wiggle around by hand cause the spring no longer has a hold on it.
     
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  10. MX127

    MX127 Bobtail Member

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    Yes, drums replaced, also one man stated eariler back in the conversation, with these older trucks, its possible the shop installed the wrong size drums.

    Uerstanding the information you provided, over sized drums will likely give the same results as your term "cam'd over", if I understood correctly.

    Thank you for replying.