670C - GRADER, MOTOR 0250 Axle Shaft, Bearings, Reduction Gears Parts group 0250 Axle Shaft, Bearings, Reduction Gears 0250 Axle Shaft, Bearings, Reduction Gears . TANDEM CHAIN AND WHEEL AXLE Tandem Drive and Planetary HFWD FIRST STAGE PINION, CARRIER AND HOUSING (RIGHT SIDE ILLUSTRATED) HFWD HUB, BRAKE PISTON HOUSING AND SECOND STAGE PINION (RIGHT SIDE ILLUSTRATED)