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Discuss 94 3/4 ton 4x4 rear brake problem in the alt.autos.gm forum at Car Dealer Forums; Was having some brake issues over the weekend. Pulled the rear drums(huge) off and found ...
  1. #1
    bigrsmith
    Guest

    Default 94 3/4 ton 4x4 rear brake problem

    Was having some brake issues over the weekend. Pulled the rear
    drums(huge) off and found the wheel cylinder to be leaking. I also
    noticed that one of the pins that goes into the end of the cylinder was
    missing. These are the pins that push out of the cylinder. After
    looking at the brake pads, you can tell there wasn't one of there when
    it was replaced. Dont know when or where.

    Does anyone know where i can get one of these? I have it apart and
    would like to get it fixed correctly. The parts store(auto zone) said
    that was a dealer item only since it never needs replaced. Any help
    would be great on this.

    It is the larger braking system as well. I think its like over 8000
    lbs.

    thanks!
    Ronnie Smith




    › See More: 94 3/4 ton 4x4 rear brake problem

  2. #2
    JRL
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem

    If the brake cylinders are leaking. Replace. If the back has drums
    then you have shoes not pads.
    On 14 Aug 2006 07:04:37 -0700, "bigrsmith" <ronnie.smith.jr@gmail.com>
    wrote:

    >Was having some brake issues over the weekend. Pulled the rear
    >drums(huge) off and found the wheel cylinder to be leaking. I also
    >noticed that one of the pins that goes into the end of the cylinder was
    >missing. These are the pins that push out of the cylinder. After
    >looking at the brake pads, you can tell there wasn't one of there when
    >it was replaced. Dont know when or where.
    >
    >Does anyone know where i can get one of these? I have it apart and
    >would like to get it fixed correctly. The parts store(auto zone) said
    >that was a dealer item only since it never needs replaced. Any help
    >would be great on this.
    >
    >It is the larger braking system as well. I think its like over 8000
    >lbs.
    >
    >thanks!
    >Ronnie Smith



  3. #3
    bigrsmith
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem

    sorry, I left the part out that i did replace the wheel cylinder
    already. That is not my problem. The problem is that one of the parts
    that stick out of the wheel cylinder that actually push the shoes out
    is missing. When i pulled the drum off, one of them was missing and
    looks to have never been put back in from the last brake job. You can
    tell by looking at the shoe, that one side has never had this piece
    touching the shoe compared to the other. I didn't drop it, and it did
    not fall out with the disassembly process either. This was done before
    i got the truck. I am needing to find one of these pieces and im not
    having much luck.

    thanks!

    JRL wrote:
    > If the brake cylinders are leaking. Replace. If the back has drums
    > then you have shoes not pads.
    > On 14 Aug 2006 07:04:37 -0700, "bigrsmith" <ronnie.smith.jr@gmail.com>
    > wrote:
    >
    > >Was having some brake issues over the weekend. Pulled the rear
    > >drums(huge) off and found the wheel cylinder to be leaking. I also
    > >noticed that one of the pins that goes into the end of the cylinder was
    > >missing. These are the pins that push out of the cylinder. After
    > >looking at the brake pads, you can tell there wasn't one of there when
    > >it was replaced. Dont know when or where.
    > >
    > >Does anyone know where i can get one of these? I have it apart and
    > >would like to get it fixed correctly. The parts store(auto zone) said
    > >that was a dealer item only since it never needs replaced. Any help
    > >would be great on this.
    > >
    > >It is the larger braking system as well. I think its like over 8000
    > >lbs.
    > >
    > >thanks!
    > >Ronnie Smith



  4. #4
    Mike Marlow
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem


    "bigrsmith" <ronnie.smith.jr@gmail.com> wrote in message
    news:1155567836.050305.3800@m73g2000cwd.googlegrou ps.com...
    > sorry, I left the part out that i did replace the wheel cylinder
    > already. That is not my problem. The problem is that one of the parts
    > that stick out of the wheel cylinder that actually push the shoes out
    > is missing. When i pulled the drum off, one of them was missing and
    > looks to have never been put back in from the last brake job. You can
    > tell by looking at the shoe, that one side has never had this piece
    > touching the shoe compared to the other. I didn't drop it, and it did
    > not fall out with the disassembly process either. This was done before
    > i got the truck. I am needing to find one of these pieces and im not
    > having much luck.
    >


    Sorry Ron, but you're not making any sense. If you replaced the wheel
    cylinder then you would have installed a complete unit. You say that the
    part was lost before you got the truck, but then you say you replaced the
    wheel cylinder. Both statements can't be true. The plunger that contacts
    the brake shoe is part of the wheel cylinder. If you replace the wheel
    cylinder you would have all of the parts.


    --

    -Mike-
    mmarlowREMOVE@alltel.net




  5. #5
    Shep
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem

    Mike, the w/c does not come with pins, at least not the ones I've bought,
    NAPA can get these for you or a dealer.
    "Mike Marlow" <mmarlow@alltel.net> wrote in message
    news:7dbd2$44e0bd26$471fbb8f$25439@ALLTEL.NET...
    >
    > "bigrsmith" <ronnie.smith.jr@gmail.com> wrote in message
    > news:1155567836.050305.3800@m73g2000cwd.googlegrou ps.com...
    >> sorry, I left the part out that i did replace the wheel cylinder
    >> already. That is not my problem. The problem is that one of the parts
    >> that stick out of the wheel cylinder that actually push the shoes out
    >> is missing. When i pulled the drum off, one of them was missing and
    >> looks to have never been put back in from the last brake job. You can
    >> tell by looking at the shoe, that one side has never had this piece
    >> touching the shoe compared to the other. I didn't drop it, and it did
    >> not fall out with the disassembly process either. This was done before
    >> i got the truck. I am needing to find one of these pieces and im not
    >> having much luck.
    >>

    >
    > Sorry Ron, but you're not making any sense. If you replaced the wheel
    > cylinder then you would have installed a complete unit. You say that the
    > part was lost before you got the truck, but then you say you replaced the
    > wheel cylinder. Both statements can't be true. The plunger that contacts
    > the brake shoe is part of the wheel cylinder. If you replace the wheel
    > cylinder you would have all of the parts.
    >
    >
    > --
    >
    > -Mike-
    > mmarlowREMOVE@alltel.net
    >
    >
    >
    >




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  6. #6
    Mike Marlow
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem


    "Shep" <djsljsrn@capital.net> wrote in message
    news:1155585649_34551@sp6iad.superfeed.net...

    > Mike, the w/c does not come with pins, at least not the ones I've bought,
    > NAPA can get these for you or a dealer.


    Maybe we're talking about two different things. I've never seen an external
    pin for a wheel cylinder. I was referring to the slug that is part of the
    wheel cylinder which the top of the shoe rests against and which pushes
    against the shoe. This part is a part of the wheel cylinder.

    --

    -Mike-
    mmarlowREMOVE@alltel.net



  7. #7
    grockswo
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem


    Mike Marlow wrote:
    > "Shep" <djsljsrn@capital.net> wrote in message
    > news:1155585649_34551@sp6iad.superfeed.net...
    >
    > > Mike, the w/c does not come with pins, at least not the ones I've bought,
    > > NAPA can get these for you or a dealer.

    >
    > Maybe we're talking about two different things. I've never seen an external
    > pin for a wheel cylinder. I was referring to the slug that is part of the
    > wheel cylinder which the top of the shoe rests against and which pushes
    > against the shoe. This part is a part of the wheel cylinder.
    >
    > --
    >
    > -Mike-
    > mmarlowREMOVE@alltel.net


    I know the pins you are talking about, and you're right, they don't
    come with the new wheel cylinders. As mentioned, Napa should be able
    to get them, or the dealership, for such a small item, I'd just hit the
    dealership, they shouldn't be too expensive. I had the same trouble
    with my rear drums on my 88 3/4 ton. Mine has the smaller brakes, but
    the trouble with them is that they don't self adjust, so next brake job
    I do on it, I'm swapping to discs from http://www.tsmmfg.com/ Kits are
    reasonably priced and for being able to get rid of the hassle of
    dealing with drums, I'm sold on them. Good luck on yours.

    Gus


  8. #8
    bigrsmith
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem

    Thanks for all the reply's. I hope we are all on the same page now.
    We are talking about the pins or whatever you want to call them that
    stick out both sides of the cyclinder that push that pads. These do
    not come with the cylinder. I have checked at 3 different spots now.
    The guy at napa says he can't get them, so i will be contacting our
    local dealer this afternoon about replacements.

    thanks again!
    Ronnie Smith



    grockswo wrote:
    > Mike Marlow wrote:
    > > "Shep" <djsljsrn@capital.net> wrote in message
    > > news:1155585649_34551@sp6iad.superfeed.net...
    > >
    > > > Mike, the w/c does not come with pins, at least not the ones I've bought,
    > > > NAPA can get these for you or a dealer.

    > >
    > > Maybe we're talking about two different things. I've never seen an external
    > > pin for a wheel cylinder. I was referring to the slug that is part of the
    > > wheel cylinder which the top of the shoe rests against and which pushes
    > > against the shoe. This part is a part of the wheel cylinder.
    > >
    > > --
    > >
    > > -Mike-
    > > mmarlowREMOVE@alltel.net

    >
    > I know the pins you are talking about, and you're right, they don't
    > come with the new wheel cylinders. As mentioned, Napa should be able
    > to get them, or the dealership, for such a small item, I'd just hit the
    > dealership, they shouldn't be too expensive. I had the same trouble
    > with my rear drums on my 88 3/4 ton. Mine has the smaller brakes, but
    > the trouble with them is that they don't self adjust, so next brake job
    > I do on it, I'm swapping to discs from http://www.tsmmfg.com/ Kits are
    > reasonably priced and for being able to get rid of the hassle of
    > dealing with drums, I'm sold on them. Good luck on yours.
    >
    > Gus



  9. #9
    N8N
    Guest

    Default Re: 94 3/4 ton 4x4 rear brake problem


    Mike Marlow wrote:
    > "Shep" <djsljsrn@capital.net> wrote in message
    > news:1155585649_34551@sp6iad.superfeed.net...
    >
    > > Mike, the w/c does not come with pins, at least not the ones I've bought,
    > > NAPA can get these for you or a dealer.

    >
    > Maybe we're talking about two different things. I've never seen an external
    > pin for a wheel cylinder. I was referring to the slug that is part of the
    > wheel cylinder which the top of the shoe rests against and which pushes
    > against the shoe. This part is a part of the wheel cylinder.
    >


    I'm not familiar with the exact application the OP is working on, but
    at least older MoPars and Studebakers used a pin that was simply
    retained by the wheel cylinder boot that actuates the shoes. The
    pistons are just that, the inside is flat and the outside is cup-shaped
    to mate with the pin which has a rounded end. When you buy new wheel
    cylinders for those apps. they come without the pins, you transfer them
    over from the old wheel cylinder.

    Unfortunately, I can't find the part either searching napaonline or
    Wagner's online catalog, so you might have a trip to the dealer in your
    future.

    If I may make a suggestion, it might not be a bad idea to replace both
    rear wheel cylinders; if that pin was missing that piston should have
    blown out of the wheel cylinder a long time ago; the fact that it was
    only leaking suggests that it was also seized, and the other side may
    not be in much better shape.

    nate


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