MTS Series 646 Hydraulic Collet Grips - Manual (Page 37)

Series 646 Hydraulic Collet Grips Installation 37
Note Although it is possible for the grips to be installed by one person, MTS
recommends using two people to lift, handle, and position the grips.
1. Set up the load unit.
A. Turn on the system hydraulic pressure.
B. Adjust the actuator and crosshead position as necessary to allow
adequate room to install the grips.
C. Turn the hydraulic pressure off. Ensure that system hydraulic pressure
has been reduced to zero before proceeding.
D. Clean and lubricate the mounting studs. Clean the mounting studs with
alcohol or similar degreasing solvent. Then lubricate them with
Molykote G·n paste.
E. If needed, install a threaded insert into the actuator rod and the force
transducer.
2. Mount the lower grip to the actuator piston rod using the appropriate
attachment kit.
A. Place a small piece of compliant material (such as styrofoam), to act as
a spacer, inside the connector stud hole of the grip.
B. Thread the mounting stud into the lower grip. The mounting stud
should turn freely. If any resistance is encountered, disassemble and
correct the problem before proceeding.
C. Add any required shims, spacers, or spiral washers to the stud.
Note When installing spiral washers, place them together with the spiral
surfaces facing each other. Rotate the washers until they are fully closed
(minimum thickness).