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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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 Posted: Thu Jul 07, 2011 6:34 am Post subject: Brake Adjusters |
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How far can you safely let the brake shoe adjuster screws out? These are new shoes, and I still feel like I need to bring them out more. Can't imagine what I'll have to do as the shoes wear?
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1957 Beetle
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BulliBill
Samba Member
Joined: July 09, 2004
Posts: 4572
Location: St Charles, MO
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| Posted: Thu Jul 07, 2011 6:51 am Post subject: |
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On quick glance, your work so far looks great. So your drums fit over the shoes as adjusted in this photo? If so, I suspect your drums are pretty worn, perhaps beyond the wear limits. You should have the inner diameter measured and if past the wear limit (I don't have my Bentley with the I.D. wear limit spec handy) you may need to invest in better used or new drums. Those adjusters are pretty far out already.
Bill Bowman
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Thu Jul 07, 2011 6:58 am Post subject: |
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thanks, I never did measure the drums inside. I just went by eye lol. They were nice and smooth, no ridges anywhere.
This is my first time working with a bus, so I wasn't sure if that adjustment length was normal or not.
Time to mic out a drum, the specs should be in a "without guesswork" scan on here right?
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Thu Jul 07, 2011 7:03 am Post subject: |
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From a '65 Without Guesswork. Should be the same for my '67 Drums.
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Campy
Samba Member
Joined: January 10, 2005
Posts: 4933
Location: Chico, CA
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| Posted: Thu Jul 07, 2011 11:54 am Post subject: |
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The problem with having a brake drum that is way over the legal limit is that the piston in the wheel cylinder could pop out (the O-ring seal).
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bugcollections
Samba Member
Joined: November 07, 2007
Posts: 795
Location: Texas
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| Posted: Thu Jul 07, 2011 12:17 pm Post subject: brakes |
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| With drums within specs the adjusters should be almost all the way in. I would suspect that your drums are worn beyond specs or there is something funky about those shoes. |
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Thu Jul 07, 2011 1:08 pm Post subject: Re: brakes |
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| bugcollections wrote: |
| With drums within specs the adjusters should be almost all the way in. I would suspect that your drums are worn beyond specs or there is something funky about those shoes. |
Good to know. Shoes came from BusDepot, I believe they are Canadian made?
Hope to measure some spare drums I have at home tonight!
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bobrk
Samba Member
Joined: March 07, 2002
Posts: 288
Location: Beautiful Downtown San Jose
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| Posted: Thu Jul 07, 2011 1:41 pm Post subject: |
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| Campy wrote: |
| The problem with having a brake drum that is way over the legal limit is that the piston in the wheel cylinder could pop out (the O-ring seal). |
Yes, this is true. Don't ask me how I know.
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Thu Jul 07, 2011 3:06 pm Post subject: |
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| bobrk wrote: |
| Campy wrote: |
| The problem with having a brake drum that is way over the legal limit is that the piston in the wheel cylinder could pop out (the O-ring seal). |
Yes, this is true. Don't ask me how I know. |
Did it come completely out? Is it possible to come out enough to not let fluid dump out, but perhaps take in some air? (doubtful)
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bobrk
Samba Member
Joined: March 07, 2002
Posts: 288
Location: Beautiful Downtown San Jose
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| Posted: Thu Jul 07, 2011 4:11 pm Post subject: |
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| GLHTurbo wrote: |
| bobrk wrote: |
| Campy wrote: |
| The problem with having a brake drum that is way over the legal limit is that the piston in the wheel cylinder could pop out (the O-ring seal). |
Yes, this is true. Don't ask me how I know. |
Did it come completely out? Is it possible to come out enough to not let fluid dump out, but perhaps take in some air? (doubtful) |
Mine dumped fluid. It's been a few years, so I'm hazy on the details, but my brakes were gone when I tried to use them. It was a combination of bad star adjuster clickers, worn out drums and a single circuit master cylinder. My buddy advises replacing with a dual MC, and we have all new NOS brake drums ready to go in.
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1500 single port | 1963 small nut/big brake transaxle | CSP Disc Brakes | dual circuit m/c | Deutsch Polster seats |
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Sat Jul 09, 2011 1:33 pm Post subject: |
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how can I accurately measure my drums? My dial calipers only go to 6"!
I played with a tape measure, but that's not accurate at all.
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Campy
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Joined: January 10, 2005
Posts: 4933
Location: Chico, CA
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| Posted: Sat Jul 09, 2011 1:45 pm Post subject: |
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A measuring tape will at least let you know if the drums are worn out.
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