Technical Description

Description The axle assembly has a spiral bevel type ring gear and pinion with further reduction provided by a planetary gear set.

Primary Reduction The spiral bevel pinion and ring gear transmit power through the center differential pinions, side gears and planetary gear sets to the axle shafts. The spiral bevel differential assembly is mounted on tapered roller bearings, which are adjusted by the positioning of the two threaded adjusting nuts mounted in the differential carrier and cap assembly. The tapered roller pinion bearing preload is adjusted and maintained by a precision ground and hardened spacer positioned between the pinion nut and shaft shoulder.

Secondary Reduction In the trumpet arm is a self-centering sun gear that drives four planetary gears. These gears in turn mesh with and react against a rigidly mounted internal gear. The planet gears rotate on roller bearings mounted and retained in the planet carrier, which in turn drives the axle shaft. Positive lubrication keeps all moving parts bathed in lubricant to reduce friction, heat and wear.

Internal Liquid Cooled Brakes The multiplate liquid cooled brakes are located between the differential carrier and the trumpet arm. Reaction discs are tanged to the trumpet interior; friction discs are splined to the sun gear shaft. The hydraulically activated piston is mounted in the differential carrier. Brake torque is produced by applying hydraulic pressure to the piston, which applies axial force to the brake friction and reaction discs, generating torque at the sun gear shaft. When hydraulic pressure is released springs push the piston back releasing the brake.