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pdecheine
Joined: 02 Dec 2009 Posts: 29 Location: United States
1966 Catalina
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Posted: Thu Jul 17, 2014 9:24 am Post subject: 1966 Catalina Brakes |
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I just finished a complete brake job on my 66 Catalina. I installed new brake lines, shoes, and wheel cylinders. The back brakes overheated to the point the drums warped and I had them turned. I noticed the ends of the shoes were making contact but not the middle of the shoe. (the arc of the new shoes match the old ones perfectly). I think that they will eventually "wear in" I backed the adjuster way off and both drums were cool after a 15 mile drive.
On the way home from that drive the left front drum overheated. That side had self adjusted too much so I backed it off. Have I missed something? I did the brakes on this car about 15 years ago with no problems. |
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Larry Site Admin
Joined: 01 Jun 2006 Posts: 4773
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Posted: Thu Jul 17, 2014 10:06 am Post subject: Hot Brakes |
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I have never had shoes arched if the new shoes matched the old ones. Plus, like you, have always figured they wear in "naturally" any way.
There is no reason that a self-adjuster should over-adjust to the point that a shoe gets tight. Were the shoes still tight when you tried to remove the drums? It wasn't a master cylinder still applying pressure, right?
As the only thought I can come up with at the moment, did you put the corrects front vs. rear shoe in the proper places. If you check the manual (we have the '66 manual on-line), you will see that there is a "primary" and a "secondary" shoe. The lining may be larger on one of the shoes, and the linings may be positioned higher or lower on the shoe body.
I don't know if mixing these up will cause your problem, or not... will have to do some reading on it. _________________ PontiacRegistry.com... building the single largest source of Pontiac information, services, and entertainment in the world! |
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pdecheine
Joined: 02 Dec 2009 Posts: 29 Location: United States
1966 Catalina
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Posted: Thu Jul 17, 2014 10:17 am Post subject: |
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Thank you for your reply. I did use the online shop manual and thank you very, very much for providing such a great tool. The rear drums were not tight against the shoes when I removed them after they overheated. I did back the adjusters way off and that seems to have solved the problem. I did position the front shoes properly as per the shop manual. Maybe they just need time to wear in. It just seems strange to have this problem when the first brake job went flawlessly. I thought perhaps I might have missed something obvious. |
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Larry Site Admin
Joined: 01 Jun 2006 Posts: 4773
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Posted: Thu Jul 17, 2014 5:42 pm Post subject: Brakes |
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If the adjusters are working properly, they shouldn't over tighten anything.
Do some backing up and brake applying and they should find their comfortable position.
Possibly they just need to wear in a bit as you suspect.
If the pedal was to get very high and hard, then it would be an indication of a big problem (or two). If the pedal feels right, I would just check them by touch a couple times just to be sure. They may be quite warm, but not the kind of warm that makes you go >#@!*@!
Also, is all the braking nice and even with no pulling to one side or the other? And no wheel has locked up and skidded, has it?
Could just be a different liner material that is making this a bit of a pain. Remember, since the last time you did this there have probably been a lot of material changes. _________________ PontiacRegistry.com... building the single largest source of Pontiac information, services, and entertainment in the world! |
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