Can not bleed brakes (one side).

[rfmaster]

As the title says I can not bleed front passenger side on my 75 C20. Over the last couple of months I've noticed that truck pulls to the left when brakes are applied. Since I drive my truck sparingly (on weekends) I thought that my caliper seals is gone and caliper is leaking. Got some re-mfg calipers from Napa and new pads for both sides (kept brake hoses since it looks like it is a PITA to R&R without a lift) for this straight forward refresh brake job. Surprisingly, both caliper seals were dry. Swapping calipers was a simple 10 minute job, but bleeding brakes turned into an 2 hour adventure. I started with passenger side - could not get a drop of fluid with my vacuum MitiVac. Driver side bleeds without a hitch - fluid was draining as it should be. I tried priming right side caliper with brake fluid - MitiVac promptly sucked it dry. Disconnecting brake hose at caliper and applying brakes couple of times resulted in no brake fluid - Master cylinder was full!

I feel a bit dumb founded - what I am missing??? Do I have cracked right side brake line? Caliper hoses appear in good shape and dry (it there a trick way to R&R hoses?)

Need some advise here - please. (The job will have to wait until next weekend - it is 96+ here!)


//RF

[LONGHAIR]

It is most likely the rubber line. They can collapse internally, which blocks the fliud flow and you can't tell it from the outside.

[swampfox]

I had the same problem on a 86 1 ton and it was the rubber brake line.

[joe231]

Originally Posted by LONGHAIR

It is most likely the rubber line. They can collapse internally, which blocks the fliud flow and you can't tell it from the outside.

Originally Posted by swampfox

I had the same problem on a 86 1 ton and it was the rubber brake line.

bad hose

[rfmaster]

Originally Posted by LONGHAIR

It is most likely the rubber line. They can collapse internally, which blocks the fliud flow and you can't tell it from the outside.

Originally Posted by swampfox

I had the same problem on a 86 1 ton and it was the rubber brake line.

Originally Posted by joe231

bad hose

Gentlemen - thank you kindly. It looks like I have to R&R caliper hoses (which I purchased ahead of time) in my near future. Now - FSM shows that there is in frame (inside the u-channel) retaining nut and hard line screws into caliper hose. Reaching in there is a bit cramp and (probably) full of dirt and grime. I guess there is no easy way getting there - Crows foot may make it easier????

//RF

[dman1982]

the other day on my truck the bleeder was full of crap and i had to clean it out.

[lilpoindexter]

I used a crow foot to try to remove my hard lines at the frame...I also doused them with PB blaster...they came off, but they looked beat, and the nut was rounded a little, so i changed them anyway. I put russel braided flex lines on mine, and i wasnt getting as much fluid from the pass side, as the driver side, so i took the bleeder out, and fluid shot out...I guess the bleeder might have some crap in it, but they bled ok.
By the way, I used the russel speed bleeders, and they kicked ass.