MTS Series 247 Actuators User Manual
Page 33
Spiral Washers
Series 247 Actuators
Installation
33
Do not exceed the maximum HPS output pressure or apply a force greater
than the capacity of any component in the force train.
Exceeding the tensile load capacity of any element in the force train can
cause equipment damage and/or personal injury.
It is necessary to temporarily exceed the tensile load capacity to achieve the
requirements of
in this procedure. This is accomplished by increasing the
output pressure of the HPS. Contact MTS Systems Corporation.
11. Turn on the system hydraulic pressure.
Note
Be sure all components in the force train can accommodate the required
tensile load.
12. Apply a static tensile load 10 to 20% higher than the maximum load to be
applied during testing.
If your test requires the maximum tensile load of the force train, you will
need to adjust the output pressure of the HPS to reach the required tensile
load.
13. Using the spanner wrenches, rotate the spiral washers in opposite directions
to tighten them. The opening between the washers must not exceed an arc of
30° from the closed position (see the figure on the previous page).
If more than a 30° arc is created, remove the tensile load from the specimen.
Then remove the specimen and the connector stud. Examine the connector
stud for any signs of thread wear. If wear is noticed, replace the stud and
repeat
through