SPIDER AS-FAN 6I1365 - Caterpillar

Power Flow
Illustration 1 g00462700
Steering clutch and brake (1) Clutch retainer (2) Clutch plates and friction discs (3) Output hub (4) Clutch piston (5) Retainer for brake (6) Brake plates and friction discs (7) Brake piston (8) Spring (9) Brake housing (10) Chamber (brake pressure) (11) Outer axle shaft (12) Inner axle shaft (13) Input hub (14) Chamber (clutch pressure)The steering clutch and brake components transfer power from the bevel gear to the final drives.The steering clutches contain these main components: clutch retainer (1), clutch plates and friction discs (2), clutch piston (4) and output hub (3) .The steering clutches are engaged by pressure oil which is sent from the steering and brake control valve to chamber (14) .The brakes contain these main components: retainer (5), brake plates and friction discs (6), brake piston (7), disc spring (8) and brake housing (9) .The brakes are engaged by spring (8). The brakes are released by pressure oil which is sent from the steering and brake control valve to chamber (10) .Power from the bevel gear is sent through inner axle shaft (12) to input hub (13). Input hub (13) is connected to output hub (3) by clutch plates and friction discs (2). Output hub (3) is connected to outer axle shaft (11) by splines. Outer axle shaft (11) is connected to the final drive.Steering Clutch and Brake Operation
When you steer the machine to the right the steering clutch that is on the right side of the machine is disengaged. When one steering clutch is disengaged, the inner axle shaft (12) is not connected to outer axle shaft (11) on that side. Also, the right brake can engage in order to prevent the outer axle shaft from rotating. During forward operation, the machine turns to the right since the left track rotates and the right track does not rotate.When you steer the machine to the left the steering clutch that is on the left side of the machine is disengaged. When one steering clutch is disengaged, inner axle shaft (12) is not connected to outer axle shaft (11) on that side. Also, the left brake can engage in order to prevent the outer axle shaft from rotating. During forward operation, the machine turns to the left since the right track rotates and the left track does not rotate.Straight Movement
During straight movement of the machine, pressure oil is sent through internal passages to chambers (10) and (14). This pressure oil holds the brakes in the released position and the steering clutches in the engaged position.Then, when power from the bevel gear is sent through inner axle shafts (12) to input hubs (13), output hubs (3) turn outer axle shafts (11). Gradual Turn
The oil pressure that is sent to chamber (14) decreases to 0 kPa (0 psi) after the steering control lever is moved and resistance is felt. Then, the steering clutch is released. Input hub (13) rotates, but no power is transferred to outer axle shaft (11) on one side of the machine.