MTS Series 647 Hydraulic Wedge Grips - Manual (Page 44)

You might need to insert the double swivel eyebolts into the threaded holes on the grip chamber. Attach
a lifting device to the double swivel eyebolts and position the grip on top of the lower grip.
Important:
NO STANDARD EYEBOLTS should be used to lift the grip.
d) With the connector stud facing up, add any required shims, spacers, or spiral washers to the stud.
e) Turn on hydraulic pressure and slowly raise the lower grip until the stud on the upper grip just makes
contact with the force transducer. Reposition the grip as necessary for proper thread alignment.
f) Slowly screw the grip into the force transducer until it is snug.
4. Align the grip wedge openings.
Check the alignment between the upper and lower grips.
Align the lower grip as necessary for the desired hose connection and wedge opening orientation. If the
actuator rod cannot be rotated, remove the lower grip and install one or more shim washers between the
spiral washers and the lower element of the force train. Reinstall the grip.
Align the upper grip wedge opening with the lower grip wedge opening. If proper alignment is not possible,
remove the upper grip and install one or more shim washers between the spiral washers and the upper
element of the force train. Reinstall the grip.
5. Connect the hydraulics.
Turn the hydraulic pressure off. 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.
Using the provided hydraulic hoses, make connections between the pressure and release ports on the
grip and the pressure and release ports on the load unit or the external hydraulic grip supply. See your
load unit product manual or hydraulic grip control manual for their port locations.
6. Tighten the grips.
See the appropriate procedure and preload the connector stud and return to this procedure when done.
7. Install the wedges.
See the appropriate procedure to install wedges into the grips.
Install Axial-Torsional Grips
About the Installation of Axial-Torsional Grips
Grip installation in a load unit force train involves attaching one grip onto the end of the actuator rod and one
grip to the force transducer or crosshead. The grips are mounted to the load unit with conductor studs.
The following figure shows the components used for most installations.
44 Series 647 Hydraulic Wedge Grips Reference Manual
Installation