MTS Series 201 Actuators - Manual (Page 34)

Series 201 Actuator Product Information 34
Removing Accessories with Spiral Washers
2. Install the actuator in a suitable fixture that can withstand a tensile load 10%
to 20% greater than the maximum load to be applied during testing.
3. Select force control at the system controller.
4. Apply system hydraulic pressure according to applicable system procedures.
Do not exceed the maximum HPU output pressure or apply a force greater
than any force train component capacity.
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. This is
accomplished by increasing the output pressure of the HPU. For more
information, contact MTS Systems Corporation.
Note Be sure all components in the force train can accommodate the required
tensile load.
5. Apply a static tensile load 10%–20% higher than the maximum load to be
applied during testing.
6. Use the spanner wrenches to rotate the spiral washers to reduce their
combined thickness to a minimum.
7. Reduce tensile load to zero and remove hydraulic pressure. Ensure that all
residual pressure (including accumulator pressure) has bled off.
8. Remove force train components (such as load cell, swivel rod end, or
fixtures) from the actuator.
WARNING