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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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| | | | Joined: Nov 2019 Posts: 18 'Bolter | | 'Bolter Joined: Nov 2019 Posts: 18 | All the shops I trust are behind on their work so it's 1-2 months to get my truck in for the brakes. I just got new 22.5 radials mounted on single pc budd wheels and now I am ready to get the truck able to stop. The truck has a 6.0 LS and 4L80E. I have the master cylinder and wheel cylinders and brake lines. The current issue is that the fluid just stays in the master cylinder, doesn't run down into the lines. Pedal goes to the floor and I have zero braking. What could be the issue. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If the plunger in the master doesn’t go back far enough to get a charge of fluid, nothing will happen, I presume you mean ‘new’ lines.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Mar 2004 Posts: 6,223 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,223 | Did you bench bleed the MC? Are you following the shop manual on how to bleed the brake system? Do you get fluid out of the wheel cylinder bleeders when bleeding the system? Do you still have the Hydrovac Booster in place? Have you adjusted the brake shoes? Mike B  | | | | | Joined: Dec 2018 Posts: 2,450 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 2,450 | JApache That master cylinder should squirt out a powerful stream of fluid,get it in your vice with a line going right back into it. Get it to recirculate there,put it on the truck engine not running. I then put aclear hose on a drilled thru bleeder bring it around the truck and let it squirt into the master cylinder. You can clear the air out then !! Not much mess or loss that way. You can see what your getting,if dirty let it go on the ground and add more. then follow shop manuel directions engine off for all of that. | | |
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