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| | | Forums66 Topics128,087 Posts1,055,974 Members48,430 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Mar 2008 Posts: 127 Shop Shark | | Shop Shark Joined: Mar 2008 Posts: 127 | My 57 6400 has Air over Hydraulic brakes. I redid the wheel cylinders, two on each side on the back and one on each side on the front.
I'm trying to bleed the air out of the lines and cylinder but not being to successful. Is there a trick to this?
I'm doing it the same way I would do a full hydraulic system. By having someone press the brake pedal and then bleeding one cylinder at a time.
Last edited by rautru; 12/05/2013 9:23 PM.
Glory Bound...
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy rautru, I just checked my 57 maintenance manual, the only difference mentioned with the "Air-Pak" is to bleed the "Air- Pak"number one (highest) bleed screw first and then number two (on the output tube) bleed screw, then bleed the remaining wheel cylinders as you normally would, hope that helps | | | | | Joined: Mar 2008 Posts: 127 Shop Shark | | Shop Shark Joined: Mar 2008 Posts: 127 | Had them power bled, turns out the master cylinder is shot.
Thanks for the info though.
Glory Bound...
| | | | | Joined: Aug 2005 Posts: 1,186 Shop Shark | | Shop Shark Joined: Aug 2005 Posts: 1,186 | I recently did my '55 1st 6400. I fought with this also until I retracted my rear shoes all the way so there was very little space left in the rear cylinders then used my power bleeder to get the last of the air out. This made a HUGE difference.
Bruce | | |
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