| Rear Brake seals [message #370233] |
Sat, 30 July 2022 18:10  |
boybach
Messages: 566
Registered: December 2020
Location: Vancouver Island
Karma: 4
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Have to admit it's been forever since I dealt with drum brakes/shoes/wheel cylinders as I've been driving cars with 4 wheel discs for a long time.
Well having a GMC, drum brakes are part of the game so time for a refresher course is now. I'll be pulling the wheels and drums off next week to have a look at what's what. I'm expecting to change the shoes and while I'm in there I figure I may as well change the wheel cylinders too.
Probably change the fluid as well and luckily my pal has loaned me his Jim Hupy pressure bleeder kit so I should be good.
One thing that concerns me is that I see some chatter online about "brake seals".
What are these and where do they fit in the scheme of things? Are they just the rubber seals on the ends of the brake cylinders or some other vital part I need?
Larry
Larry - Victoria BC -
1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses
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| Re: Rear Brake seals [message #370236 is a reply to message #370233] |
Sun, 31 July 2022 09:14  |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Larry, it should be the circular metal ring with a rubber lip/seal on the inside of the ring. You press it into the frame side of the hub. When you reinstall the hub/brakes the seal goes around the spindle to keep water out of the bearings, and to keep the grease in the hub. Dave Lenzi has a tool to press the seal in place. you don’t want the seal to be pressed in completely flush with the end of the hub.
Scott
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: Rear Brake seals [message #370269 is a reply to message #370233] |
Wed, 03 August 2022 22:28 |
boybach
Messages: 566
Registered: December 2020
Location: Vancouver Island
Karma: 4
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Senior Member |
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Oh I get it now. They aren't actually BRAKE seals, but hub bearing seals. OKAY!
Larry - Victoria BC -
1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses
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| Re: Rear Brake seals [message #370284 is a reply to message #370269] |
Thu, 04 August 2022 17:57 |
blur911
Messages: 166
Registered: December 2020
Location: Kingston, Ontario
Karma: 4
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boybach wrote on Wed, 03 August 2022 22:28Oh I get it now. They aren't actually BRAKE seals, but hub bearing seals. OKAY!
Exactly, just a regular hub seal. I put one of mine together today.
I'm having problems with sealing the other end, which is a steel bearing cap. I bought a set of Dorman caps and they are way too tight, I ruined two trying to get them in before I gave up. They should be common 2.5" caps, but these Dormans are made wrong or something. Will go shopping next time I'm in town.
Burl Vibert
Kingston, Ontario
1976 GMC 26 foot, Sheridan reno, don't know original model but we call her Roxie
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| Re: Rear Brake seals [message #370287 is a reply to message #370233] |
Thu, 04 August 2022 19:50 |
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RF_Burns
Messages: 2276
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Senior Member |
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Burl,
I had the same issue last year. The Dorman's seem to be made with a steep taper so they won't stay in place. I think I found a couple at Princess Auto that worked... but had to rummage through the bin to find acceptable ones.
Seems to me I wrote down a part number that was suppose to be a good fit, but I can't find it at the moment.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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