MTS Series 244 Actuators - Manual (Page 51)

Description Item
Upper End Cap 3
Actuator Rod 4
Spiral Washers 5
Connector Studs 6
Swivel Head 7
Installing Fixtures with Spiral Washers
This procedure requires two spanner wrenches and assumes that you are familiar with all operating aspects
of your system.
Multiple Fixtures With Different Ratings
Sometimes you may have multiple fixtures in the force train that have different force ratings. When installing
the fixtures pretensioned with spiral washers, install the fixtures with the lowest force rating first. Then install
any other fixtures from the lowest to the highest force rating.
1. Ensure that system hydraulic pressure has been reduced to zero before proceeding. To do this, turn off
the hydraulic power unit and exercise the actuator until it stops moving.
2. Clean the connector studs and the internal threads of the force train element(s). Inspect the thread mating
surfaces for signs of contamination or corrosion. All damaged threads should be repaired or the component
replaced.
3. Apply a thin layer of Molykote G paste, or equivalent, to all thread mating surfaces.
4. When installing a load cell, place a small piece of compliant material inside the load cell to keep the stud
from contacting the bottom of the hole (see the figure called “Force Train Components”).
5. Slowly turn the connector stud into an element of the force train (for example, the actuator rod). The
connector stud should turn freely. If any resistance is encountered, disassemble and correct the problem
before proceeding.
Series 244 Actuators Product Information 51
Installation