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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Drum Brake issues

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Old Nov 13, 2021 | 08:34 AM
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Drum Brake issues

1970 F100, 390 3sp. 2w/d. 4 wheel drums

Brakes have been completely rebuilt. Everything new. Turned drums before installing. The issue is that the brakes work perfectly when the brakes are still cold/cool. But when they warm up and get hot they start pulsating and pulling to the right. I just don't understand this change or what to do first. Obviously the heat expands the materials, but to this extreme?? There's a long backstory to the brakes as it is, I've played hell with these things for awhile now and I'm out of ideas. Thanks
 
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Old Nov 13, 2021 | 10:40 AM
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With new shoes it does take time for them to seat/set in to the drums.
if they are currently grabbing/pulsing when hot I would play with the adjusters for a while and see if it gets better over time.
 
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Old Nov 13, 2021 | 03:54 PM
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Could be a bad drum. If the drum is worn too thin it can warp with heat.
 
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Old Nov 13, 2021 | 07:39 PM
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They are new drums...turned before installation. I will probably try to adjust them a bit. Thanks
 
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Old Nov 15, 2021 | 08:59 AM
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Make sure to use the auto adjusters a bit too if you haven't already.
 
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Old Nov 17, 2021 | 09:31 PM
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Originally Posted by NJBone
Make sure to use the auto adjusters a bit too if you haven't already.
The auto adjusters only work (if they work at all!), when you back up and step on the brake pedal.
 
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