TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 201 of 894

MOTOR TRUCK SERVICE MANUAL

BRAKES-AIR

ROCKWELL-STANDARD

STOPMASTER BRAKES

The Stopmaster Brake is a wedge actuated brake.

The brake power unit forces a wedge between two rollers and two plungers.

This causes the plungers to spread apart and

push the brake shoes against the brake drum.

There are several variations of Stopmaster Brakes in use.

Some have two power units per brake and others only one.

Where two power units are used, there may be a Fail-Safe unit on one or both.

The brake support may be either a cast

spider or a stamped backing plate.

On the cast spiders, the plunger housings may be either integral or bolted on.

Brake

shoe adjustment may be either automatic or manual.

Other minor variations are also in use.

The various basic Stopmaster Brakes are identified as model RDA, with letters denoting the following:

R-Stopmaster

Brake, Wedge Actuated; D-Double Actuated; A-Air operated;