Brakes mystery

[davidh190]

Hi guys,

 

So I replaced the drums, rotors, brake shoes and pads, and the wheel cylinders. The brake pedal was sinking in so I replaced the master cylinder. It kept doing that so I replaced that cylinder along with the power brake booster. Although the brake pedal feels much better, when I've been driving around for a while, I feel the brake pedal goes down a little too much. Am I going crazy or is there something else I should check? Here's a pic of my truck.

 

 

Sent from my iPhone using Tapatalk

[HOrnbrod]

Couple of things to check:

 

Did you re-adjust your rear brake shoes with the star wheel so they just barely drag when rotating the wheel?

Did you check the booster vacuum check valve?

[cruiser54]

Excellent points^^. 

[mikekaz1]

If its a booster issue, wouldnt it get harder rather then softer?

 

Soft/sinking is normally a fluid loss or air bubble. How much did you bleed when replacing everything?

[davidh190]

Couple of things to check:

 

Did you re-adjust your rear brake shoes with the star wheel so they just barely drag when rotating the wheel?

Did you check the booster vacuum check valve?

No sir, but I will check that out tomorrow.

 

 

Sent from my iPhone using Tapatalk

[FrankTheDog]

Did you follow the proper procedure to bleed the rear brakes with the proportioning valve?

It is outlined somewhere on this site.

[big66440]

If you have the original single diaphragm booster the pedal is naturally a bit "mushy" and does seem to go lower than the average vehicle from what I can remember, that was part of the reason I went with the 95-96 XJ dual diaphragm set up.