hey all, so seems like this has been all about brakes for me the past month. rebuilt and now I got to install the master cylinder in my 56 dodge truck (holy ****, woulda been easier to pull the motor!). it's been waiting on ramps for almost a week. now my kids 56 coronets front p***enger wheel has locked up. goes in reverse fine but when we put it in drive it LOCKS hard. pulled off the drum and put a rebuild kit in the cylinders. when doing so it seems the shoes have pushed out to the point of locking on the hub. -even with no line connected. tried adjusting with the eccentric posts but nothing. I cant figure out what in the hell would make the wheel lock up out of the blue. haven't touched the brake shoes so I know its not an issue with leading vs trailing shoes getting mixed... its got me stumped! thanks for any input.
Hi.. its all together properly? there is a adjustment for those.. it just toes in the top or bottom.. the Dodge Duel fronts are difficult.. It took me sometime to make it work.. if it locked up.. chances are a Broken spring..
yeah, played around w/the adjustments, no luck. wherever I put them it still wants to push out against the drum. I know its not a broken spring cause I had it apart to do the cylinder kit.. got me stumped. especially cause it just happened out of the blue one day after rolling around no prob.
You guys and your new mopars...my 40 never did that...who'm I kidding! As I recall the push rods off of the twin wheel cylinders can get swapped and sometimes one is longer than the other...switching could lead to over or under amount of push for the shoes...add to that that some shoe manufacturers might have used thicker material if you swapped shoes...as for the twin or major and minor brake adjustments, one needs to fully turn the nuts all the way back in then adjust the majors close, then the minors to tweek and center, then repete as needed. Yeah, it's an art with the lockheed brakes...makes me like the more modern self adjusting bendix brakes!
This makes me rethink something that happened to mine...the MC wasn't adjusted right...the pedal rod didn't have enough free play and the MC couldn't bleed off all of the brake pressure, continued stopping did nothing but increase the pedal height and lock up the brakes on me...let it sit and the pressure eventyally bled off[10-15 min]. Maybe your bleed hole in the MC is now plugged up alot or alittle and doing the same thing?
definitely will check that! combo of that with the shoes not being adjusted properly locks em down perhaps? its really weird that it has no problem with reverse though. that may be where one of the shoes catch on the lip when it's put in drive..
The backing plate may be grooved from where the shoes ride. The new thicker shoes get stuck in the old groove and lockup. Weld up the grooves and grind smooth. Lubriplate works nice when done.
The Jalopy Journal
