Front disc brakes locking up, 72 Duster

[RustyRatRod]

I adjusted the push rod length very slightly and tested it without lockup. I'll drive it again for a longer distance to confirm.

I've gotten great feedback and I really appreciate everyone's comments.

Hopefully it's solved but I will report back if there are any issues.

Thanks to all.

Yes. That probably did it. The industry has gotten sloppy with tolerances. I had the same issue after a master cylinder replacement on my Ford truck.

 

[67Dart273]

Wrong M/C having a residual check valve in the front line.

You can remove them or easily rupture them with a small nail. Those WILL NOT create anything close to lockup

 

[Swinger 340]

Als

If your hoses are old, they can collapse and cause that.

Also, if they are a pin slid, check for binding. Possible, a little lube will correct the problem. If the pins are ruff, you may have to replace them. I have had both issues in the pass on my toys.