Assembly Of The Drive Shaft; Bearing; Unbalance; Maintenance - Unimog U500 Mounting Manuallines

Body and Implement Mounting Guidelines U500 North America

5.11.4 Assembly of the drive shaft

Optimization of synchronization
All original (vehicle-side) drive shafts have been statically and
dynamically balanced in order to avoid vibrations.
They are marked accordingly.
Each drive line assembly is comprised of several universal-
joints and shafts. The synchronization of each driveline is sub-
ject to optimization (compensation of the differences in angular
velocity of the universal-joints between input and output). This
synchronization optimization is coordinated exactly to the
phasing of the joints and the overall length of the driveline.
Early in design the specified universal-joint offset must be
considered in order to compensate for irregularities due to
slight differences in the joint angles of the drive shafts.
Important Note: During assembly of a drive shaft or a
driveline, the marks at the universal-
joints, yokes and splines must be
aligned.
Depending on the design of the drive
shaft, one of the two marks can be lo-
cated underneath the rubber sleeve.
Noises and vibrations
Noises and vibrations may occur:
•
If the speed of an implement is too high or too low
•
Due to vibrations originating from the implement/body
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•
If the load is too high or too low
•
Due to worn-out universal-joint shafts or bearing
mountings
•
Due to drive shafts that are incorrectly assembled fol-
lowing repair as a result of the marks not being noted
or the absence of the marks

5.11.5 Bearing

The bearings of the input and output shafts are radial and axial
heavily loaded due to statically and dynamically forces and
torques. Therefore the bearings must be adequate designed.

5.11.6 Unbalance

After each repair the drive shaft must be new balanced.

5.11.7 Maintenance

When using non maintenance-free drive shafts, easily acces-
sible lubrication service points should be considered. Mainte-
nance-free drive shafts have one-time grease ex factory and
needn't be serviced. Inspection and maintenance instructions
of the manufacturer, depending on the operating conditions
must be considered. Only authorized dealers may repair fail-
ures or damages on the drive shafts using original spare parts.
Mechanical drive of implements
August 2005