Auto 4WD Power Flow
Power is delivered from the transmission (1) to the input shaft (2). The input shaft (2) is splined to the rear output shaft (7). To deliver the power to the rear propeller shaft (9), the power is constant through the rear output shaft (7). When power is required for the front propeller shaft (11), a command is sent to the encoder motor (13). The encoder motor (13) rotates the shift detent lever (12), which is cam shaped. The cam action moves the clutch lever (3). The clutch lever (3) pivots on the clutch lever pivot studs, and moves toward the clutch apply plate to engage the clutch. As more pressure is applied to the clutch apply plate, the clutch discs are compressed.
Using the inner clutch discs, which are engaged with the clutch hub (4), and the outer clutch discs, which are engaged with clutch housing (5), the power flow is delivered to the clutch housing (5). The clutch hub (4) is splined to the rear output shaft (7). The clutch housing (5) rotates on a needle bearing on the rear output shaft (7). The chain drive sprocket (6) is splined to the clutch housing (5). The power flows from the drive sprocket (6), through the chain (9), to the chain driven sprocket. The chain driven sprocket is splined to the front output shaft (10). The power flow is delivered to the front propshaft (11) through the front output shaft (10).