Oerlikon Torque-Hub CW18 Series, Service Manual

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8
Planetary Final Drive Service Manual
Roll and Leak Test
Torque-Hub
® units should always be roll and leak tested before
disassembly (if possible) and after assembly to make sure
the unit’s
gears, bearings and seals are working properly. The following
information briefly outlines what to look for when performing these
tests.
The Roll Test
The purpose of the roll test is to determine if the unit’s gears are
rotating consistently, easily
and properly. It should be able to rotate
the gears in the unit applying constant force to the roll checker. If
more drag is felt in the gears only at certain points, then the gears
are not rolling consistently and easily and should be examined for
improper installation or defects. Some gear packages roll with more
difficulty than others. Do not be concerned if the gears in the unit
seem to roll hard as long as they roll with
consistency . Rotate the
gearbox both clockwise and counterclockwise the same number of
turns as the ratio of the unit. The gearbox ratio is the same number
as the last three numbers
on the ID tag.
Model Code Roll Test Tool
CW18Ax1xxx T184729
CW18Dx1xxx T184729
CW18Dx2xxx T180149
CW18Dx4xxx T180149
CW18Dx8xxx T180149