Brake Mounting Hole Pattern for Demco # DMSB24428M Hydraulic Brake Assembly

Updated 07/28/2015 | Published 07/27/2015

Question:

What are the distances between the top two holes and the distance between the top and bottom holes of the DMSB24428M to connect to flange ? On my trailer it is 4inch and 3.

asked by: Ron

Helpful Expert Reply:

The Demco # DMSB24428M hydraulic brake assembly uses an oddball bolt pattern that's laid out in a rectangle, rather than a square like what's usually found. When correctly aligned so the brake cylinder is at the top, the bottom holes measure 3.25 inches apart, center to center. The top holes are 2.40 inches apart from the bottom holes, again measured center to center. You can see this dimension in the photo I've edited for you.

To clarify, the brake assembly you're wanting to replace is hydraulic and has 4 holes, is that correct? One row of holes is 4 inches apart and the other is 3?

Is there any markings, or brand name, part number, etc on the brake assembly?

expert reply by: Mike L