custom cabby
Well-known member
Here we go...
What I have:
'59 F100, rear drum/front power disc conversion from '71 Lincoln including booster and master cylinder and block, late '70's Ford rotors & new mid '80's Chevy calipers. Newer brake lines.
Problem I have:
When truck is not running, pedal is somewhat stiff but doesn't build up pressure with more pumps. When running, the pedal goes all the way down and finally stiffens when about .5" away from floor, at the same time you hear a lot of air in the pedal movement. When truck is in gear, it barely stops from a roll.
What I have done:
Bled the brakes from pass. rear wheel, to rear driver, to front pass., to front driver. All flowing good and without air. No visible leaks anywhere.
What I'm thinking:
If the master cylinder was bad and leaking around the seal, I would notice fluid loss either in the cab or the outside firewall and there is none. On the other hand I'm not sure what I would encounter if the booster was bad.
Opinions welcome.
What I have:
'59 F100, rear drum/front power disc conversion from '71 Lincoln including booster and master cylinder and block, late '70's Ford rotors & new mid '80's Chevy calipers. Newer brake lines.
Problem I have:
When truck is not running, pedal is somewhat stiff but doesn't build up pressure with more pumps. When running, the pedal goes all the way down and finally stiffens when about .5" away from floor, at the same time you hear a lot of air in the pedal movement. When truck is in gear, it barely stops from a roll.
What I have done:
Bled the brakes from pass. rear wheel, to rear driver, to front pass., to front driver. All flowing good and without air. No visible leaks anywhere.
What I'm thinking:
If the master cylinder was bad and leaking around the seal, I would notice fluid loss either in the cab or the outside firewall and there is none. On the other hand I'm not sure what I would encounter if the booster was bad.
Opinions welcome.
