Caterpillar Tractor Co.

Richard E Frauenhoff

Rodger L Moring

A brake assembly comprises a housing having a piston assembly reciprocally mounted thereon to selectively release the normally 'on' brake assembly upon pressurization of an actuating chamber defined therein. The piston assembly comprises an annular piston having an opening formed therethrough to communicate with the actuating chamber. An annular pressure plate is releasably attached to the piston by a plurality of circumferentially disposed bolts. A cover plate is detachably mounted on an outboard side of the piston to normally cover and seal the opening formed therethrough and to further cover at least one of the bolts whereby the cover must be detached from the piston prior to releasing the bolt covered thereby.

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Montgomery, IL, United States of America

Richard E Frauenhoff