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Old 06-09-2019, 12:31 AM   #1
72longstepper
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Join Date: Dec 2018
Location: Carnation, WA.
Posts: 76
Redoing rear drums

Never seen brakes in this condition before. Have a quick question in regards to the wheel cylinders. Had to cut off the heads off both bolts, the one closest to the front was a flat head bolt and the other was a 7/16 hex head. Is it possible that they were the original ones??? Goes without saying that they were froze and looked like they were almost 50 years old. 1972 GMC.
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Old 06-09-2019, 11:04 PM   #2
Rick Bollinger
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Join Date: Mar 2018
Location: Colchester IL
Posts: 115
Re: Redoing rear drums

I believe mine were a 5/16 bolt with a 7/16 head kind of a odd duck. When I replaced my cylinders I rounded one off and temporarily used a allen head cap bolt. A standard 5/16 bolt has a 1/2" head and was too big it would hit the bleeder.
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