Brake chamber PM.

Discussion in 'Ask An Owner Operator' started by RunningAces, Nov 22, 2021.

  1. skallagrime

    skallagrime Road Train Member

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    You say that but ive never had a truck without both drive axles using parking cans

    2x petes with tmc
    My 94 kw
    The internationals with ruan
    The w900l i had for a bit this year/ drove a few years ago
     
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  3. Final Drive

    Final Drive Road Train Member

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    On the new brake chambers you don't have the option to remove the spring side of the chamber ......
     
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  4. xsetra

    xsetra Road Train Member

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    $69.00 each new today at advance auto. IMG_20211124_191214698.jpg
     
  5. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    That's why I replace the whole can instead of dealing with doing the diaphragm.
     
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  6. Pamela1990

    Pamela1990 Road Train Member

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    All 8 of our trucks parking brakes on both drive axles, and the trailers have parking brakes on all axles.
     
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  7. God prefers Diesels

    God prefers Diesels Road Train Member

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    If you have parking brakes on both axles, and you lose all your air, both axles lock up and cause you to fishtail. If only one axle locks up, you can still use the other axle to keep you moving straight. Maybe there's another reason, but that's the only one i can think of. Kinda makes sense, I guess.
     
  8. YardMule89

    YardMule89 Light Load Member

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    This is not completely accurate. The park brake spring side has had "non-removable" clamps on them for years. I've always released the brakes, backed brakes all the way off, broke loose the service/emergency lines and removed rear clamp. Easy peasy. Now, if the nose of the can is badly corroded then a cage bolt is in order for sure. But simply unbolting a chamber from the backing plate is not a life or death procedure.
     
  9. SmallPackage

    SmallPackage Road Train Member

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    If you dont have the bolt or the spring is broke You don’t have to cage a chamber on the side of the road. Just back the adjustment off all the way loose on the slack.

    As far as both axles on tandems having park brakes. That has traditionally been customer preference. Front or rear or both was how the order was taken when speced. Some came front drive only. Some rear drive only.
    Majority did not have on both drives because of mobility issues of getting truck off the road in an emergency air loss clamp down situation. That was what the “bus system” blue knob and reserve tank that california mandated back in the day was for. Many 70’s and 80’s era models had that extra blue knob for a one time squirt of air to yank ya outta harms way.
    Same with brakes on steer axle prior to July of 1980. Some had them. 99% did not.
     
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