• After trying to bleed brakes and getting fluid at all wheels. The rear calipers don’t move at all. Is there something I am missing that would stop these from moving? I just received the axle with these brakes from a local shop that built the axle for me and need advice.
• 1985 CJ7 – Chevy 350
• Stock front Disc brakes
• 8” Dual Diaphragm Power brake booster unit.
• Master cylinder, 1” bore
• Stock proportioning valve
• New Rear Disc Brakes (Calipers/Discs/Pads from 1998 Ford Explorer)
• Ford 8.8 axle cut to width.
• Braided lines from Calipers to Steel lines then to rear brake hose.
Rear disc conversions seem to be hit and miss. Some have no problems, some have nothing but. Could be you need a residual valve. Might want to search the forum. There are several rear disc threads that might have a solution for you.
'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.
The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her. :-D
The residual valve is actually inside the master cylinder. It simply maintains a set amount of pressure in the rear brake system (IIRC, it's about 10lbs for a typical drum brake). The residual valve is there to help apply some pressure to counter the rear brake shoe springs when they retract. It minimizes the distance the shoes need to travel before they engage in the drum. That helps keep a nice firm brake pedal with "comfortable" travel.
On a typical rear disk setup, the brake pads don't have any sort of spring system trying to retract them.. usual residual valve for a disk setup is about 2lbs.
I'd verify that your getting pressure in the rear line coming out of the master cylinder. If so, next point of blockage would be the proportioning valve. Maybe crack the rear line coming out of the proportioning valve while someone depresses the brake pedal. If you have pressure at the proportioning valve, next stop is back at the rear axle lines and calipers.
Also, if you let the master cylinder go dry, you may have to bench bleed it to get good pressure/flow from it again.
'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..
After trying to bleed brakes and getting fluid at all wheels. The rear calipers dont move at all. Is there something I am missing that would stop these from moving? I just received the axle with these brakes from a local shop that built the axle for me and need advice.
1985 CJ7 Chevy 350
Stock front Disc brakes
8 Dual Diaphragm Power brake booster unit.
Master cylinder, 1 bore
Stock proportioning valve
New Rear Disc Brakes (Calipers/Discs/Pads from 1998 Ford Explorer)
Ford 8.8 axle cut to width.
Braided lines from Calipers to Steel lines then to rear brake hose.