Power Train Systems Operation7
Systems Operation
Drive Axle
The planetary axles incorporate a single reduction
carrier/differential assembly with hypoid gearing. The
final reduction is of planetary spur designed gearing
built into the wheel hubs.
The axles have only cast housings.
The Planetary Axles permit the hypoid gearing of the
carrier and the axle shafts to carry only a nominal
torsional load. At the same time, they provide the
highest practical numerical gear reduction at the
wheels.
•
The hypoid pinion and differential assembly of the
first reduction are supported by tapered roller
bearings.
•
The pinion bearing preload is adjusted and
maintained by a hardened precision spacer
between the inner and outer bearings.
•
The differential tapered bearing preload is adjusted
and maintained by the positioning of the threaded
adjusting rings in the carrier leg and cap bores.
•
The teeth of the floating sun gear mesh with teeth
of the planetary spur gears.
•
The planetary gears rotate on planetary shafts
which are mounted on a spider. The planetary gear
teeth in turn mesh with teeth of the floating ring
gear.
•
Power is transmitted by the hypoid gear set in the
carrier to the axle shafts and the sun gear of the
final reduction, through the revolving planetary
gears, and into the planetary spider which drives
the wheel hub.
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