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| Illustration 1 | g00301529 |
Components of the Rear Drive and Steering Axle (1) Axle shaft. (2) Carrier. (3) Stationary brake plates. (4) Friction discs. (5) Springs. (6) Pins. (7) Differential. (8) Side gears. (9) Spider. (10) Pinions. (11) Clutch packs. (12) Brake Housing. (13) Brake piston. (14) Guide pins. (15) Flange. (16) Pinion gear. (17) Differential ring gear. | |
Power from the transmission output shaft is transferred to the rear axle by the drive shaft and universal joints. The power enters the rear axle through the flange (15). The flange (15) is attached to the pinion gear (16). The pinion gear (16) rotates in the axle with two opposing tapered roller bearings. Power is transferred from the pinion gear (16) to the differential ring gear (17). The differential ring gear (17) is bolted to the differential (7) .
Power is transferred through the differential (7) by the pinions (10), spider (9), the clutch packs (11), and the side gears (8). Refer to Systems Operation, "Differential" for more information about the differential. The side gears (8) are splined to the axle shafts (1). The components to the left and to the right of the differential (7) operate identically.
The rear axle contains the service brakes. The brake plates (3) are splined to the brake housing (12). The friction discs (4) are splined to the carrier (2). The carrier (2) is splined to the axle shaft (1). When the brakes are applied, the brake pistons (13) push the brake plates (3) against the friction discs (4). This causes friction. The friction causes the wheels to turn at a slower rate or stop. The brake piston (13) is held in place by the pins (6) and (14). When the brake pedal is released, the springs (5) on the pins (6) force the brake piston (13) away from the brake plates (3). This releases the brakes on the axle.
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| Illustration 2 | g00304504 |
Components of the Rear Drive and Steering Axle (1) Axle shaft. (18) Tie rods. (19) Hydraulic steering cylinder. (20) Sun gear and shaft. (21) Carrier. (22) Planetary gears. (23) Ring gear. (24) Flange. (25) Housing. (26) Upper pin. (27) Universal joint. (28) Lower pin. (29) Nut. | |
The power is transferred through the axle shaft (1) and the universal joint (27) to the final drive. The final drive causes the last speed reduction and the last torque increase in the drive train. The final drive consists of the following components: the sun gear (20), the carrier (21), the planetary gears (22), and the ring gear (23). The sun gear (20) is splined to the universal joint (27) and the axle shaft (1). The ring gear (23) is splined to the housing (25) and held in place by the nut (29). Three planetary gears (22) are mounted in the carrier (21). The carrier (21) is bolted to the flange (24). The flange (24) rotates on the housing (25) with two opposing tapered roller bearings.
The power is transferred through the sun gear (20) to the planetary gears (22). The planetary gears (22) revolve around the inside of the ring gear (23). The movement of the planetary gears (22) around the ring gear (23) causes the carrier (21) and flange (24) to rotate. Power is transferred from the flange (24) to the wheel.
The hydraulic steering cylinder (19) is connected to the housings (25) through two adjustable tie rods (18). The housings (25) rotate on the axle with opposing tapered roller bearings. The tapered roller bearings are located in the upper pin (26) and the lower pin (28).