H-boost dragging front brakes

[KRAWLER]

Hydroboost setup is dragging front brakes. Using wild horses front disc conversion with proportioning valve. also using the angled 76-77 bracket with h-boost setup. I adjusted the linkage in the pedal to give it a little slack, fixed it temporarily, got hot again coming home today.Any ideas?

 

[mac77]

I have heard of the soft brake lines crimping the internal steel braided part of the line. This will act as a check valve allowing fluid in and not allowing it to return.

 

[Broncobowsher]

Too much preload on the master cylinder rod will cause the brakes to drag. Master cylinder bottoms the rod out before the ports open enough.

 

[Deano]

Here is a idea to check. In between the master cyl and the hydro boost is a rod that may have a adjustment if so back it off 1/2 turn and see if that might help.

 

[KRAWLER]

Deano, did that worked great for about 2 weeks, now dragging again.Broncobowsher, what you recommend?

 

[904Bronco]

Might need a spacer between MC and Hyd bst unit... When attaching MC does it compress the rod that sticks out from HB? Mine did when using the 80Camero MC, I made a spacer out of 1/8 " aluminum to solve the problem.

Doug

 

[ransil]

Might need a spacer between MC and Hyd bst unit... When attaching MC does it compress the rod that sticks out from HB? Mine did when using the 80Camero MC, I made a spacer out of 1/8 " aluminum to solve the problem.

Doug

I used 2 washers for spacers

 

[dmsbronco]

When you installed the calipers, had you lubed all the parts that could have been lubed... contact points of pads touching calipers, the rods holding caliper to bracketry. I also had the same issue without hydroboost.

 

[KRAWLER]

Thats a good point by both. I will place and spacer and lube everything and try again

 

[PaveBronco]

Are you using a dual return res?

 

[bronconut73]

Are you using a dual return res?

Hmmmm....maybe the "uncommon but dreaded" T line adapter flow issue.

 

[KRAWLER]

Ah crap, bronconut, fill me in. I am using a T return

 

[Desert Thrasher]

I had the same issue when I first got my HB going. Broncobowsher is probably right, you need a spacer between the MC and HB. Like someone said above, 1/8" is what I needed. Try some washers first and if it fixes it then make a spacer.