9U1739 is Caterpillar’s 94-tooth brake outer plate used as the outer member of Cat’s service brake in final-drive assemblies. Cataloged as 9U-1739: 94 Tooth Service Brake Outer Plate in the Final Drive Plates category, this part serves as the outer plate for the service brake and coordinates with the inner brake components to transfer braking torque. Raybestos Powertrain lists 9U1739 Plate-Outer for wheel dozer and wheel loader brake applications and describes it as a replacement outer plate assembly.
