SCREEN AS 3808484 - Caterpillar

Illustration 1 g00883008
The torque limiter is designed in order to prevent damage to the rotor transmission when overloading occurs. The torque limiter is located in the drive line of the power train, that is located in front of the rotor axle. When the rotor comes in contact with a fixed object, the torque limiter will slip. This prevents shock loading from being transmitted back to the transmission. Under normal conditions, a load spike does not affect the cutting operation of the machine.Note: The engine will stall in 1.5 seconds, if the rotor stalls due to an object that has become fixed in the hood.
Illustration 2 g00884409
OptionalCross-Sectional View of the Torque Limiter (1) Spring (2) Plate (3) Hub (4) Adapter (5) Surface (6) Indicator pinHub (3) is bolted to the rotor axle. Adapter (4) is bolted to the output shaft of the rotor transmission. Hub (3) and adapter (4) are held together with two plates (2) between the two. Pressure from the springs will hold hub (3), and adapter (4) together. The correct torque will then be obtained. This allows slipping under severe load without damaging the power train of the rotor. The torque limiter withstands a torque of 6552 N m (4833 lb ft) before any slipping may occur.As pin (6) extends past surface (5), the torque limiter needs to be rebuilt.
Illustration 3 g00897664
StandardCross-Sectional View of Shear Disc (7) Shear boltThe shear disc is designed in order to protect the rotor drive components under a heavy load. Ensure that 7X-0319 Shear Bolt (7) is used with this shear disc.Note: Do not tighten shear bolt (7) against plate (8). This is illustrated in the illustration below with dimension (9). Failure to heed these instructions will cause the shear bolt not to shear and damage may result to the rotor drive components.
Illustration 4 g00897669
Cross-Sectional View of Shear Bolt Section (7) 7X-0319 Shear Bolt (8) Plate (9) Dimension from plate to shear bolt