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| | | | Joined: Jun 2007 Posts: 39 'Bolter | | 'Bolter Joined: Jun 2007 Posts: 39 | i have a 1955 ist series 3100 p/u. it was restored in 2001. bone stock. when driving the truck, to stop or slow down, i have to push the brake pedal hard. there is no grinding. is this a sign of a master cylinder going bad? if the master cylinder is bad, should i replace it with a dual master cylinder? thanks in advance, jim | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | What procedures do you use to bleed and to adjust the brakes? | | | | | Joined: Feb 2004 Posts: 29,767 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,767 | How many wheels are actually trying to stop? It sounds like you've got a couple of wheel cylinders corroded or gummed up, or maybe some collapsed flex lines that are keeping some of the brakes from working. Jack up wheels one at a time and see if you can turn the wheel while a helper applies the brake. Unless it's a daily driver, a lot of oddball stuff can happen to a brake system in 19 years.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | A lot of the time this problem is a result of the drums being turned oversize and the shoes not being arced to match.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Dec 2014 Posts: 678 'Bolter | | 'Bolter Joined: Dec 2014 Posts: 678 | Possibly glazed shoes and drums from excessive heat at some time in its life.
Another possibility is grease or oil contamination on the shoes.
Don't randomly replace parts without first ascertaining what the actual problem is.
1951 Chevy Panel Truck
| | | | | Joined: Sep 2020 Posts: 1 Moderated | | Moderated Joined: Sep 2020 Posts: 1 | i too have master cylinder problems on my chevy c60 truck. i have not found a replacement for it as it is 2 different sizes the clutch is 1 1/8 " but the brake is 1 1/4 i can fine dual 1 1/8 and dual 1 1/4 but not the 2 together does any one know if i go with one of the single sizes will it be a problem one way or the other will the 1 1/4 overwelm the clutch or will the 1 1/8 not be enough for the brakes ??? | | |
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