FD-30001, FD-30500, FD-30600, FD-36500, FD-37500, RD-30500,
RD-30600, RD-36500 and RD-37500 Series Drive Axles
The axle assembly is a full-floating spiral bevel type with
Following is a list of axles covered in this manual and the
further reduction provided by planetary gear set within the
applicatron of these axles
The spiral bevel pinion and ring gear transmit power
through the center differential pinions and side gears or
through a No SPlN differential to the axle shaft. The spiral
bevel differential assembly is mounted on tapered roller
bearings which are adjusted by positioning of the two
threaded adjusting nuts mounted in the differential carrier
and cap assembly. The tapered roller pinion bearing pre-
load is adjusted and maintained by a hardened and pre-
cision ground spacer positioned between inner and outer
bearings. Spacer is selected at assembly.
In the wheel hub, a self-centering sun gear is spline fitted to
the axle shaft and drives three planetary pinion gears.
These gears in turn mesh with and react against a rigidly
mounted internal ring gear. The planet gears rotate on
needle roller bearings mounted on hardened and ground
pins located in the planet carrier which in turn drives the
wheel hub, Positive lubrication keeps all moving parts
bathed in lubricant to reduce friction, heat and wear.
Brake assemblies are actuated by hardened and ground
cam shafts which in turn are actuated by air chambers
mounted externally on the axle. Air pressure is provided
to the air chambers from the air system of the vehicle when
Proper lubrication is necessary to assure long periods of
foot pressure is applied to the brake treadle valve mounted
trouble-free operation. Not only is it important that the re-
on the floorboard of the operator's compartment.
quired lubrication schedule be maintained, but also that
the proper type of lubricant be used. The following are the
Manually operated parking brakes are supplied on some
models. These consist of a brake drum, mounted on the
only lubricants recommended for use in these axles. Con-
companion flange, which encompasses a mechanically
sult applicable Operators Manual for machine model in-
volved for capacities and lubrication schedules.
operated brake shoe and lining assembly.