I just fitted a new Master cylinder fromAlretta (last year!) and a brake booster (NAPA/UAP) for my '73 rm300 Brave. I followed the Dodge chassis service manual and all went well until I tried to reconnect the push rod pivot bolt to the booster and the brake link arm. There is nothing about setting the bolt and I cannot remember where the locking nut was when I removed it - duh!
I managed to line both the bolt and the hole in the link but the push rod bolt was screwed almost all the way in. The return spring was also difficult to fit - I had to stretch it about an inch to locate in the securing hole.
I bled the master cylinder on the bench and bolted to the booster. The booster has a push rod which fits into the master cylinder. I'm pretty sure the push rod went into the hole.
I have not run the motor or connected the vacuum pipe. The pedal moves, but not much. The brake arm bump stop is about !" from the arm. There does not seem to be any adjustment in the brake linkages except for the brake light switch bracket which has a nut and bolt detent.
Should I now unscrew the push rod until it is about mid way or will this cause problems.
Should i reconnect the vacuum pipe and run the motor and test the pedal movement?
It's all very confusing lying upside down under the wheel arch with each bit of guk which falls, always lands in my eyes - must be some law of winnebago nature.
Thanks and keep smiling,