Proportioning Valve Keeps Tripping?

[Rust_never_sleeps]

I actually did adjust them to the point where the wheel wont turn. Still the same. I am thinking I have a huge bubble somewhere and its possibly in the rear circuit at the prop or in the prop valve.

Gotcha. I had better luck syringe bleeding the MC/combo valve than bench bleeding, or at least felt more certain about it.
Bought a pack of these off the River :shrug:

[KyleSeal]

Originally Posted by Rust_never_sleeps

Gotcha. I had better luck syringe bleeding the MC/combo valve than bench bleeding, or at least felt more certain about it.
Bought a pack of these off the River :shrug:

Ive thought of this as well when I was bench bleeding the MC. That may be on the list after some abrupt pressure bleeding.

[72c20customcamper]

When the light goes on do the rear brakes still actuate? The proportion valve when tripped will stop the fluid from going to that circuit. I would let the light come on and try to bleed the rear brakes no fluid the circuit is tripped if you get fluid then it may be the switch .

[kwmech]

See post number 5

[KyleSeal]

Originally Posted by kwmech

See post number 5

Heres that picture. I had to get it at home last night so I could post it here today. I consulted the people who sell these and they say rear is rear and front is front.

[kwmech]

Originally Posted by KyleSeal

Heres that picture. I had to get it at home last night so I could post it here today. I consulted the people who sell these and they say rear is rear and front is front.

That's what I was getting after, 1/2 vs 3/4 have swapped lines back and forth regarding the placement of the residual valves.

[KyleSeal]

Originally Posted by 72c20customcamper

When the light goes on do the rear brakes still actuate? The proportion valve when tripped will stop the fluid from going to that circuit. I would let the light come on and try to bleed the rear brakes no fluid the circuit is tripped if you get fluid then it may be the switch .

From what I can hear, they still actuate. I am doing this alone so I use my phone camera to see whats going on. With the switch in, it will only send the shuttle valve backwards a small amount, and still let fluid out. When I take the switch out, it will close them entirely. At this point, I have ordered a pressure bleeder to see if I can force some sort of hidden air pockets out.

[72c20customcamper]

Originally Posted by KyleSeal

From what I can hear, they still actuate. I am doing this alone so I use my phone camera to see whats going on. With the switch in, it will only send the shuttle valve backwards a small amount, and still let fluid out. When I take the switch out, it will close them entirely. At this point, I have ordered a pressure bleeder to see if I can force some sort of hidden air pockets out.

Did you change the rear cylinders? May not be correct size for the system

[KyleSeal]

Originally Posted by 72c20customcamper

Did you change the rear cylinders? May not be correct size for the system

I had changed them out years ago, when I did the brakes in the rear and they operated at that time fine. That was years ago and when it was on the drum drum setup. But I couldnt imagine an issue there - as a lot of people do the disc drum conversion and I havent seen it notated that they touched the rear brakes at all.

[72c20customcamper]

Originally Posted by KyleSeal

I had changed them out years ago, when I did the brakes in the rear and they operated at that time fine. That was years ago and when it was on the drum drum setup. But I couldnt imagine an issue there - as a lot of people do the disc drum conversion and I havent seen it notated that they touched the rear brakes at all.

I would talk to the tech guy . The master may not be correct for your rear brake cylinder. Most places sell generic masters mostly for cars . If your rears are to large there may be a pressure differential between the disc and drum brake for a fraction of a second causing it to believe there is a leak in the rear circuit.

Maybe change out the portioning valve it could be defective.