Allright, need a brake expert here because my mechanic buddy and I are getting are ass kicked.
Managed to round up a new/used proportional valve and M/C off another local 78 FJ40 that is down for a re-build right now. Brakes worked fine off of that rig before they tore it down.
Installed the different proportional valve first this morning and bled out the brakes. The vacume bleeder actually sucked down the rear reseviour unlike the one I we tried the first time before taking it apart, so we thought that was a good thing. Got everything bled out and the pedal still goes to the floor. It gets presure on the second stroke, but right to the floor the first time every time.
We adjusted there rear drums so that they were locking up the rear tires standing still, just to make sure the pads were all the way out....same thing?
Installed the different M/C off that other 40, repeated all of the above steps and then some in the bleeding department..........Same thing, got nothing on the first stroke, right to the floor. Can get it on the second and hard on the third, seems like it might have gotten a little worse with that different M/C.
We are extremely confident that the air is bled out of the lines, hell we did a dozen times now. Proportional valve came off a working 40, so did that other M/C. Adjusted the rear pads right into the drums to confirm that they were hitting the drums.
Keep in mind, I had front brakes a few days ago when we hadn't bled out the rear yet. I believe at that time the proportional valve I had on was plugged or stuck, so no fluid was getting to the rear. We belive that if we were to plug the rear line right now we would get the pedal back in the front brakes?
Just rambling here....any ideas? Same set up on my 40, worked fine for years, no problems ever like this?
Thanks, Matt