brake problem

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Aug 3, 2009 | 08:31 PM

wiseguy50

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Junior User

Joined: Dec 2004

Posts: 52

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From: mpls. mn.

brake problem

ok heres the deal. i have no brakes first thing in the morning. backing up or going forward. pump a few times, bingo, have brakes. go down the road, back up with slight and i mean slight incline, no brakes. pump, pump, pump, have brakes. i have power assist master cyl 7 in, installed underneath drivers side. front disc rear drum. cant find a leak. blead everything and still a problem. brakes are 3 yrs. old. problem just started this summer

Aug 3, 2009 | 08:56 PM

eman92082

Cargo Master

Joined: Apr 2007

Posts: 2,063

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From: Valley Center, California

If no leaks, I'd start with the Master Cylinder thinking that it's seeping past the piston until you pump it.

Aug 3, 2009 | 11:46 PM

Julies Cool F1

Post Fiend

Joined: May 2008

Posts: 7,641

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From: Poway, Ca.

Quote:

Originally Posted by eman92082

If no leaks, I'd start with the Master Cylinder thinking that it's seeping past the piston until you pump it.

Agree!

Brake fluid is flowing around the seals or O-rings.

Aug 4, 2009 | 08:24 AM

RicManSr

Cross-Country

Joined: Jun 2009

Posts: 93

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From: Independence, Louisiana

X's 3 yup what they said.

Aug 4, 2009 | 10:46 AM

jaye

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Joined: Aug 2000

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From: S.C.

Do you have the residule valves on the lines since you have your MC under your driver's side they are needed to keep fluid in the lines.

Aug 4, 2009 | 11:18 AM

RicManSr

Cross-Country

Joined: Jun 2009

Posts: 93

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From: Independence, Louisiana

Quote:

Originally Posted by jaye

Do you have the residule valves on the lines since you have your MC under your driver's side they are needed to keep fluid in the lines.

That wouldn't explain why they were good for the last 3 year though. Would it? No residual valve would present a problem eary on right? I could be wrong. Mine don't have them. I've been wrong before in the past, I'll be wrong again in the future.
Ricky