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09-15-2015, 08:24 PM
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#1 |
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Registered User
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
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Soft brake on first pump
I do not understand why I have a soft brake one my first pump. I firms up quick. I bled all corners. 1979 c10. New booster. New master cylinder. New proportion inc valve. Bench bled. Did it right or so I think
__________________
Chris _______________________________ 1979 Chevy Stepside SPORT 2018 Chevy Silverado, 39 years apart  My build 2008-2016. http://m.imgur.com/a/bURrE |
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09-15-2015, 10:50 PM
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#2 |
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Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,273
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Re: Soft brake on first pump
Poorly adjusted drum brakes?
(ie: first pump pushes the shoes out to the drum, second pump builds pressure)
__________________
1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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09-16-2015, 12:42 AM
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#3 |
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Registered User
Join Date: Sep 2013
Location: Vacaville CA
Posts: 490
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Re: Soft brake on first pump
Make sure that new master cylinder has a residual valve in the circuit to the rear drums. If it's possibly a disc/disc master then it might not.
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09-16-2015, 07:26 AM
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#4 |
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Registered User
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
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Re: Soft brake on first pump
I will adjust the brakes a little more. I thought I had them out pretty good, but that makes sense. Right now Iam pushing it in and out of the garage so dont want them to be too tight
Makes sense thanks
__________________
Chris _______________________________ 1979 Chevy Stepside SPORT 2018 Chevy Silverado, 39 years apart My build 2008-2016. http://m.imgur.com/a/bURrE |
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