1978 Pickup: Brakes redone, but now pedal two-step behavior
Posted: Sat Mar 20, 2010 8:26 am
Along with a lot of other wheel work, I had a mechanic completely go over the brakes on the '78 pickup. I know, I know, I should have done this work myself, but I've been too busy and I liked the idea of getting a lot of work done at once in a couple of days. Luxurious, I know. And everything is great except this brake issue:
Problem: The brake pedal stops at the normal place, down a few centimeters, and the bus begins to stop. Then, every time, after a few seconds, the brake pedal drops another few centimeters, to a second position. The bus continues to stop normally.
What is causing this two-step behavior?
Is it dangerous (should I stop driving)?
Background:
The brake system on this bus has no vacuum booster and never did, FWIW.
The brake work done by the mechanic includes:
- new hoses all around
- new cylinders and pads on the rear drums
- new rotors and pads on the front discs
- adjustment of emergency brake
- replace fluid and bleed, or course
Problem: The brake pedal stops at the normal place, down a few centimeters, and the bus begins to stop. Then, every time, after a few seconds, the brake pedal drops another few centimeters, to a second position. The bus continues to stop normally.
What is causing this two-step behavior?
Is it dangerous (should I stop driving)?
Background:
The brake system on this bus has no vacuum booster and never did, FWIW.
The brake work done by the mechanic includes:
- new hoses all around
- new cylinders and pads on the rear drums
- new rotors and pads on the front discs
- adjustment of emergency brake
- replace fluid and bleed, or course