wheel cylinder & brake ?

[M37greenbeast]

Hello list..

Finally got around to putting the new wheel cylinders on after the master went bye bye.. so far so good.. gear head kid helped bleed it.. worked great until the right front.. NOTHING is flowing to that brake.. at all.. the lines are "decent" and I really had not planned on changing them.. so..

Suggestions?

Hook up the fluid vac to the line and suck stuff through?

Disconnect from up stream and blow it out ??

Thanks in advance..

DL

[DJ]

What condition is the rubber hose in? Try opening steel line before the rubber one to check for fluid.


DJ

[Beltfed Only]

I had the same problem and with the same wheel! I replaced the rubber hose and had know more problems.

[M37greenbeast]

rubber hoses seem flexible enough.. not new by any means but not cracking brittle.. yeah I could replace them all but as stated they are decent..

may get to disconnect the rubber from the harder line connection later.. ran out of desire to monkey with it anymore yesterday.

dl

[MSeriesRebuild]

We have found this to be the case in more than 1 incident. Sometimes wheel cylinders start to leak, rather than fix correctly, people will take the line apart at a connection & put something inside to stop up the hole so no fluid flows to that cylinder. Makes the truck appear to have decent brakes, but only on 3 wheels. Has been used for years by the folks who want to cover up issues for quick sale of a truck.

[M37greenbeast]

As to the stubbed off potential doubt it.. came from mil reserve unit.. know brakes worked to rt front.. sure take the rubber off from the hardline.. ok rigggghhhtttt.. seems to be affixed at the molucular level.

Ok ? IF one takes the front feed lines off at the master.. takes the lines off from the wheel cylinder (s).. and blows em out with compressed air... will that work or will it damage something worse?

Thanks... still stuck..

DL

[k8icu]

Sometimes brakes are just not fun....It looks like the best thing to do is start and the MC and work your way to the WC....checking each connection for fluid flow. When you find the dam in the line replace that part and then rebleed the system. Sorry I can't say fix this and you'll be golden, but sometime you just have to go with trouble shooting 101....start from the known good source and work your way to the problem.

[Lifer]

rubber hoses seem flexible enough.. not new by any means but not cracking brittle.. yeah I could replace them all but as stated they are decent..

If the rubber lines are really old, they could be swelling on the inside enough to block the wheel cylinder. I'd suggest disconnecting the line where it enters the rubber one and checking for fluid flow there. If you get brake fluid, your rubber hose is probably the culprit.

[DJ]

It seems like the concensus here is a bad rubber hose or a blockage of some sort in that area.

[steved]

If the rubber lines are really old, they could be swelling on the inside enough to block the wheel cylinder.

They do not need to be really old to cause this...I have had 90's dodge trucks with swelled rear brake hoses that would not allow the rear brakes to function...

I would disconnect the rubber hose for the steel line and make sure there isn't a goober of rust blocking the line. If not, I would replace the rubber line if it has any age to it.

If you apply heat to the fitting, you can blow the rubber line apart because it has swelled shut (don't ask me how I know this...).

[g741]

I have had a number of customers with this problem and have dealt with it myself. The rubber hoses swell up inside and while many times you can force fluid to the wheel cylinder, it will not release.

I have all of the flex hoses (three in front and one in the rear) at decent prices. Sid