rear brake drum removal on my 1974 chevy pickup

Discussion in 'Shiny Things' started by Sniper X, Apr 10, 2011.

  1. Sniper X

    Sniper X De Oppresso Liber

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    it is a C20, 3/4 ton with floaating axles, I have the axle out whic was easy, I have all three of the keepers off, two spanner nuts, and the tin locker between them. The drum feels loose but won't slide off. Is there something else that needs to come off before this drum will come off or do I just need to keep teetering it till it works off?
    #1
  2. Sniper X

    Sniper X De Oppresso Liber

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    It feels like it is hanging up on the shoes. Where IS the adjuster and how does it work? I don't see a rubber plug like on a regular 1/2 ton drum system.
    #2
  3. troidus

    troidus Long timer

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    Back then GM sometimes didn't knock out the adjuster plug hole at the factory. Look for a plug-shaped recess in the usual spot and see if it appears to just be tacked in place. You might have to hit it with a hammer and punch to knock it out. Another place to look is on the face of the drum, but you probably would have already found it by now if it had one.
    #3
  4. Sniper X

    Sniper X De Oppresso Liber

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    it doesn't have either. What is there at the top of the backing plate where the adjuster SHOULD be is a very large stut sticking out with a nut on it. It has the be about a half inch stud with the large but on it.
    #4
  5. Hughlysses

    Hughlysses Long timer

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    On all the drums I've worked on, the adjuster slot is at the bottom of the backing plate.
    #5
  6. Motornoggin

    Motornoggin Two-Bit Throttle Bum

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    Adjuster should be at the bottom. The stud at the top is where the pull back springs are hooked, it's big because it has a lot of tension on it.
    #6
  7. Zecatfish

    Zecatfish XTique Rider

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    Pictures worth a thousand words.
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  8. RVDan

    RVDan Long timer

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    Some of those didn't have holes to get to the adjusters.

    The bearing could be hanging up on the spindle. You'll probably need a slide hammer to get it off, and it will probably leave the bearing and seal on the spindle.
    #8
  9. Klay

    Klay dreaming adventurer

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    It's almost always because the shoes are hanging up on the drums because they've worn a channel in the drums, though.
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  10. 42

    42 Bokononist

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    Actually the ring of rust on the inside lip of the drum is usually the problem. Especially if the drums have not been removed in a long time.
    The shoes run about a quarter of an inch inside the drums. The rust builds up pretty thick.
    #10
  11. Sniper X

    Sniper X De Oppresso Liber

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    I wish it was there.
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  12. Sniper X

    Sniper X De Oppresso Liber

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    That IS what is happening.
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  13. Zecatfish

    Zecatfish XTique Rider

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    Round two then,
    Slide hammer, or a chain and your ATV and JERK the drum off, you'll end up needing a brake hardware kit typically when your done.

    I have used pry bars to pop the head of the brake nail or keeper out so I could get em off.
    Sorry about the troubles. :cry Been there and done that. They don't give you a T-Shirt either.
    #13
  14. Sniper X

    Sniper X De Oppresso Liber

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    Yeah bummer, but it'll be bitchin to have good brakes again when I am done since for some odd reason, I love this truck! A guy gave me a real bitchin exhaust set up for it too so I think whilst I am looking for a steering gear I'll pop that bitch on there too. It is Hooker headers and flowmaster mufflers on a full length pipe set up. Right now it is a tiny 1.5in bargan basement dual exhaust system on it with stock manifolds. I can actually feel it holding it back.
    #14
  15. Sniper X

    Sniper X De Oppresso Liber

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    Plus at I had planned to replace everything under there anyway parts kit drums shoes everything....
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  16. troidus

    troidus Long timer

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    Might as well get backing plates (w/adjuster knockouts) and slave cylinders while you're at it.
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  17. AkBrian

    AkBrian Long timer

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    Since this is a full floater, is this a demountable drum (drum outside of hub), or non-demountable (drum inside of hub)? Is this the Corporate axle or a Dana? I still have a old 70' with the 5400# corporate axle and non-demountable drums, but I haven't used it in years. I remember it being a hassle to get the drum off the hub, as it has the studs pressed through the drum, then the hub. I'll try and remember if there was some special trick to it.
    #17
  18. Zecatfish

    Zecatfish XTique Rider

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    That will sound good.
    I got a 79 F100 that I dropped a 351w in, AOD, with just 18" glass packs and 2.5" exhaust all the way back it has a nice sound to it too. :D The larger diameter pipes deepen the note a little.
    #18
  19. seriousracer

    seriousracer be a man dodge tree bark

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    i am not f***ng stupid,but i used too. niles mi.
    is he still working on this?
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  20. CA Stu

    CA Stu Master of air potatofication Super Moderator

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    gear puller :deal

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    BTDT
    #20