The Ford Barn - View Single Post - '40 Disk/Drum brakes, no rear brake problem

Mart · 03-19-2020, 03:16 PM

My guess would be that the master cylinder is not big enough. The original cylinder is 1-1/16 not 1-1/8 as stated. but 7/8 is very small. by the time you've pushed the front pads onto the disc, there's no fluid left to push the rear brake cylinders out and get them working properly.

Try adjusting the rear brakes up until they are dragging, almost enough so you can't turn the wheel. Then see if you can bleed it enough so you can feel the brake going tight.

I'd be looking for at least a 1" cylinder.

Mart.

03-19-2020, 03:16 PM	#4
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,755	Re: '40 Disk/Drum brakes, no rear brake problem My guess would be that the master cylinder is not big enough. The original cylinder is 1-1/16 not 1-1/8 as stated. but 7/8 is very small. by the time you've pushed the front pads onto the disc, there's no fluid left to push the rear brake cylinders out and get them working properly. Try adjusting the rear brakes up until they are dragging, almost enough so you can't turn the wheel. Then see if you can bleed it enough so you can feel the brake going tight. I'd be looking for at least a 1" cylinder. Mart.