1961 Dodge Custom no power on brakes

Tiny
BENDIG
  • MEMBER
  • 1961 DODGE CUSTOM
  • 4.4L
  • V8
  • RWD
  • AUTOMATIC
  • 102,000 MILES
Hello,
I'm writing from Germany and here I have a 1955 Dodge custom royal in a very good condition. The year in the required field is wrong, must be 1955 but isn't available, so I hope you can help me, too.
The repair-shop replaced on the front axle to disc-brakes with all needed components. On rear-axle remains the old drum-brakes. But we didn't replace the mounted brake-booster, but installed a new 2 circuits-master-cylinder 1" bore-size and a proportioning-valve (no combination valve) plus a residual-valve for the rear-axle.
In fact, the system doesn't work well, because there is no sufficient brake-pressure. For a better location of the problem the mechanic blocked the brake-lines on rear-side. In this case the pressure on the disc seems ok. As well turned around with blocking the lines to the front. But not together. Now the mechanic mentioned to me to replace MC + booster + prop. Valve to a assembled kit which is offered by many supplier from Internet with the advantage of good balanced parts. As we (mechanic and me, customer) are having no experience to chose a proper kit, I'd like to ask you for a recommendation what kit do we need, mc with x" bore-size, pedal-system, etc. Or may be you have a brand for a kit. All is well-come. On the other hand we would like to understand what went wrong.

Thanks for a nice replay. If you will need more information don't hesitate requiring pics and others.

Best regards,
Jörg
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Tuesday, November 3rd, 2015 AT 1:34 PM

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Tiny
HMAC300
  • EXPERT
Why don't you contact a brake company like Raybestos, Wagner Lockheed, or maybe Borg warner. For the drum brakes you can just get a master cylinder that had drum brakes in rear so you can get rid of the residual valve. Maybe Brembo brakes as well. You will have to tell them what you have like how large the caliper piston/s are and whether it's a single piston, dual or more. Also rear brake shoe size as well as caliper size so they can give you a better idea of what to work with. You might also consider an adjustable pro portioning valve as that is what is used on a lot of street rods/high performance cars here in U.S. With your current setup make sure the back brakes are adjusted properly as it may be not adjusted right. They need drag on them when you adjust them with tire on. Oh also give the brake manufacturer the size of the wheel cylinders and if there are two per wheel or not as some Chrysler products back then had that. You might also try power bleeding the system if you haven't already. Sequence should be RIGHT REAR, LEFT REAR, RIGHT FRONT, LEFT FRONT. Also master should have been bench bled, if not there may be air between master/proportioning valve so you can crack a line there.
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Tuesday, November 3rd, 2015 AT 3:34 PM

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