# HYDRAULIC BRAKES: PRINCIPLES OF OPERATION, PART 1 (DRUM BRAKES)

Department of Defense PIN 700293 HYDRAULIC BRAKES: PRINCIPLES OF OPERATION, PART 1 (DRUM BRAKES) THIS PROGRAM DEMONSTRATES THE BASIC PRINCIPLES OF HYDRAULIC BRAKE SYSTEM OPERATION. USING THE M151 WHEELED VEHICLE DRUM BRAKE SYSTEM, THE FOLLOWING MAJOR COMPONENTS ARE IDENTIFIED AND SHOWN IN OPERATION: MASTER BRAKE CYLINDER, WHEEL CYLINDERS, BRAKE SHOES AND ASSEMBLY AND BRAKE DRUM.

- Kind: Educational
- Year: 1983
- By: Department of Defense
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/gov.dod.dimoc.700293)
- Licence or status: [CC0 1.0](http://creativecommons.org/publicdomain/zero/1.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

Not offered: its uploader or archive marks it public domain, and nothing the site holds bears that out (its record gives no year, or a year from 1978 on, which no US term has left), so where it is free is not known. Unclear is not offered.