Good pedal without air assist, not with air assist

[hughscpa]

I have done my searches and can't quite find an answer. I just recently had the brakes fixed and I had a couple bad wheel cylinders. Now I have great pedal when I have no air pressure but the pedal goes to the floor when the air is working. I can still get them to lock up when the air is on but the pedal is on the floor. I don't like that at all. Any ideas?

 

[doghead]

Did you vacuum bleed, pedal pump bleed or pressure bleed?

Pressure bleeding works great with dot5.

 

[doghead]

Did you do anything besides changing a couple wheel cylinders?

 

[doghead]

And did you start with bleeding the master cylinder, then the airpack, then the wheel cylinders?

 

[hughscpa]

Just the wheel cylinders and shoes all around. Pedal pump bleed on the brakes

 

[doghead]

Did you adjust the shoes as the TM call for? use feeler gauges?

 

[hughscpa]

Probably not. would that cause such a big difference in pedal travel?

 

[doghead]

Yes

 

[gimpyrobb]

Adjust the brake pads first, then you can adjust the peddle.

 

[hughscpa]

Okay, thanks, I will give it a try and let you know. It will probably be after the Holidays. You guys are truly amazing. Have a safe and joyful holiday season!!

 

[bigmike]

Borrow or build yourself a power bleeder. It's the best way to bleed the entire system. Also, as posted above, follow the protocol for bleeding.

 

[M813rc]

It is important for you to do the bleeding in the order Doghead suggested in post #4.

Cheers

 

[hughscpa]

Will do. I just went through the TM's for the info and printed it out.