Topic: Can't get rear breaks!

[12 valveR]

I can not get my rear breaks to bleed out I have tried a couple of times. The way I have done it is start with longest run of break line from master cylinder so drivers rear then passenger rear then passenger front then driver front. I can't get all the air out of the lines could a bad booster cause this? The front work good but don't want to go wheeling on just front breaks any help would be great and thank you.

[Dingman.]

Did you try bleeding the lspv?

[Rocksurfer]

If you don't know what it is, it is that valve with the long arm attached to the rear axle.

[12 valveR [OP]]

I took the line off at the axle where it t's off to both sides and had no air in the lines at that part then went and tried to do each side. I'm not sure if that was the correct way to do it?

[Rocksurfer]

There should be a bleeder valve.

[OOPS]

You have to bleed the LSPV last, there should be a bleeder on it!!

"I'm not sure if that was the correct way to do it?"

By doing that all you did was put more air into the LSPV!!!

[12 valveR [OP]]

I don't see how that let more air in its before the t where I unhooked the lines? So how should I do it or the correct way my breaks go out to where my fronts don't work either?

[Rocksurfer]

How are you bleeding the brakes? Longest line to the shortest.

"...This is from the FSM and it works great..."
1. Drivers side rear
2. Passenger side rear
3. Passenger side front
4. Drivers side front
5. LSPV (Load sensing proportioning valve)(if you still have it)

[OOPS]

If you look at the LSPV you will see three lines going to it, two in the front, and one in the rear. The one in the rear feeds the rear brakes. One of the lines on the front comes from the MC, the other is a return line the goes to a “T” for the front brake system. It is a bias line that changes the bias on the front brakes as the valve works up and down. That is why the front brakes still get air in them if you do not bleed the LSPV. The reason you do it last is the LSPV is the seconded highest component in the system and air travels up, hence the reason you bleed it last.

[12 valveR [OP]]

I will try this tomorrow thanks for the help I will let you guys know what I find out and thanks again.

[12 valveR [OP]]

My master cylinder and both rear wheel cylinders where leaking. Got those replaced now breaks are working good. Hope they keep working.

[Rocksurfer]

[BoG-ToY]

maybe you shouldnt break your brakes?