Copyright Goodheart-Willcox Co., Inc. 577 Chapter 17 ∣ Final Drives B C D Flange mount for outside dual wheel Flange mount for inside dual wheel A Sun gear Axle shaft Planetary carrier Stationary ring gear Drive hub Differential housing Figure 17-6. A quarry truck can be equipped with outboard single-reduction planetary final drives. A—The differential side gear delivers power to the planetary sun gear. The ring gear is held stationary, and the planetary carrier drives the wheel. B—These final drives were salvaged from a Caterpillar 771D quarry truck to be used in another truck. C—This final drive is being rebuilt to be reinstalled in a 769C quarry truck. D—The single planetary gear set from a 769C quarry truck’s final drive. Goodheart-Willcox Publisher Goodheart-Willcox Publisher Goodheart-Willcox Publisher Goodheart-Willcox Publisher Raba 694 Axle Outboard Double-Reduction Planetary Case IH Steiger tractors have used different axle brands, including Allis Chalmers, Clark, Dana, Massey, Raba, Rockwell, Steiger, and ZF. The Raba 694 axle is found in the 9350, 9370, and 9380 Steiger tractors. The axle uses double-reduction outboard planetary final drives. The differential side gear delivers power to the first stage planetary sun gear. The ring gear is attached to the wheel drive hub and acts like a held member. The first stage