DANA Spicer Torque-Hub C017A1, Руководство по обслуживанию, Страница: 7 / 44

7
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. Install Roll and Leak Test
fixture into coupling and onto spindle. Install an SAE J1926-1 #6 (9/16-
18) O-
ring fitting into the “Park” port on the spindle. Release the Park
brake by applying 1500 psi to this port. Apply constant rotational force
to the input of the gearbox. 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 six revolutions.
Model Code Roll Test Tool
C017A1 T-226231