P30 Brake Lockup - Solved
I have a 1988 Pace Arrow on a P30 chassis with 4-wheel disk brakes. Recently, the brakes have been getting pretty mushy and brake fluid has been disappearing regularly with no external signs of leaks....
Forum Discussion
Rustydog
Brake hoses are 5 years old or less. Also, both front brakes are locking, but not the rear, pointing to something in common with just both front brakes. I still have to ask how a single brake hose failure could lock up both front brakes.
Cajunfisherman
This isn't a vacuum boost system, it's a Hydraboost which uses power steering pressure.
This weekend, I'm going to drill a tiny pressure relief hole in the old MC cover and install it on the new MC to test my theory that the fluid is boiling, expanding and pressurizing the front fluid reservoir. If the scientific method doesn't yield any results, then I'll begin blindly replacing things like brake hoses, but I really don't like that approach.
Brake hoses are 5 years old or less. Also, both front brakes are locking, but not the rear, pointing to something in common with just both front brakes. I still have to ask how a single brake hose failure could lock up both front brakes.
Cajunfisherman
This isn't a vacuum boost system, it's a Hydraboost which uses power steering pressure.
This weekend, I'm going to drill a tiny pressure relief hole in the old MC cover and install it on the new MC to test my theory that the fluid is boiling, expanding and pressurizing the front fluid reservoir. If the scientific method doesn't yield any results, then I'll begin blindly replacing things like brake hoses, but I really don't like that approach.
