Dumb question about brake cylinder push rod
 

A new buddy has a problem with hydraulics on a 36. He has brakes, but only when the pedal gets about 3 inches from floor, or less. Shoes are adjusted properly. Brake and clutch pedal are positioned correctly, Will a longer adjusting rod give him more pedal? I flunked arithmetic and all other higher math courses. LOL

Re: Dumb question about brake cylinder push rod
 

The push rod should be right at the M/C piston but not pushing on it. If it is pushing on it even a little, the M/C will not vent and will build up pressure.
He may need to lengthen the arm that was added to the bottom of the brake pedal to get more travel. He may need a M/C with a bigger bore to move more fluid. He needs to see if his linkage is right for the cylinder he has. I push them all the way in and measure the stroke. I depress the pedal to see if I can get that much stroke.

Re: Dumb question about brake cylinder push rod
 

I think it has a lot to do with achieving the correct pedal ratio. Like how long or short the Clevis is and where it is positioned to the pedal. And what Andy said.

Re: Dumb question about brake cylinder push rod
 

The question is when the brake pedal is 3" from the floor, where is the master cyl. piston?
If the piston has moved significantly then the problem is not the length of the rod but more likely to be problems with brake shoe adjustment or bleeding problems.

Re: Dumb question about brake cylinder push rod
 

Do the shoes have full contact with the drums. adjust the front shoe up until there is slight drag and then the rear, slight drag. If this increases the pedal height some of the problem is the arc of the shoes do not match the drums. You can run the shoes with slight drag they will slowly arc themselves in if they are a close fit to start.
Andy is correct about the adjustment of the MC actuating rod. So changing to a longer rod is not the answer, the correct final adjustment is.

Re: Dumb question about brake cylinder push rod
 

Do you still have 39 master cylinder 1 line stock pedal. or have dual line MC.