Thread: Brake troubles

Tweet

More testing today. The e-brake arm on the caliper is only moving 1/4 to 3/8 when brake is set.
I removed the brake pad from piston side and moved the E-arm 3/8 to 7/16" dozens of times and no piston advancement, moved out but right back in when arm was released .
Moved the arm a full stroke 1 -1.5" and piston did advance. Whats this mean ? I wish I knew . Still can't understand the lack of stopping power when stepping on the brakes, only .015" gap between pad and rotor when brakes are off/at rest.
Does one side of the Master cyl.affect the other, I've been trying to work just one side of the cyl. so the front doesn't give me false high hard pedal. mumm ?

Originally Posted by Navy7797

I removed the brake pad from piston side and moved the E-arm 3/8 to 7/16" dozens of times and no piston advancement, moved out but right back in when arm was released .

Navy, a little confusing here, you said no piston advancement but then it moved out and back in? Just trying to figure out if its "#2 - The sprag will seize on the inside of the piston and will never work again" or what. I still say swap a front & rear caliper which would check your master cylinder as well as valving, about 15-20 minutes should tell something then. Just really curious at this point.

Originally Posted by Matthyj

Navy, a little confusing here, you said no piston advancement but then it moved out and back in? Just trying to figure out if its "#2 - The sprag will seize on the inside of the piston and will never work again" or what. I still say swap a front & rear caliper which would check your master cylinder as well as valving, about 15-20 minutes should tell something then. Just really curious at this point.

I thought that might be confusing. When the e-brake is applied it pushes the piston out but retracts without adjusting the brake when released. The sprag seems to only work with a full throw of the e-arm on the caliper, that can only happen when the caliper is off the rotor or a pad is removed.