MTS Series 647 Hydraulic Wedge Grips - Manual (Page 46)

• Lubricant.
• Appropriately sized double swivel eyebolts, adequately sized wood blocks and plywood sheet (or equivalent),
and an appropriately sized lifting device.
Important:
NO STANDARD EYEBOLTS should be used to lift the grip.
Install Axial-Torsional Grip
If you are installing the grip on an axial-torsional force transducer, perform the force transducer alignment
procedure before proceeding (see the appropriate load unit product manual).
The following procedure assumes that the actuator is mounted in the base of the load unit and the force
transducer is mounted to the crosshead. If you have a load unit with the actuator mounted to the crosshead,
make the appropriate changes to the following procedure.
For an assembly reference, see Axial-Torsional Grip Installation Components on page 45.
Note:
Although it is possible for the grips to be installed by one person, we recommend using two people to
lift, handle, and position the grips.
1.
Warning:
Grip installation is dangerous because it occurs within the crush zone of the force train while
full hydraulic pressure is applied and actuator movement is required during the installation.
Unexpected actuator movement can cause personal injury and damage to the equipment.
Take every precaution to avoid unexpected actuator movement while installing the grips.
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) Select rotation control and adjust the actuator to the mid-rotation position.
d) Turn the hydraulic pressure off.
e) 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.
f) Clean and lubricate all of the surfaces that will contact each other (screw threads, spacers, and so
forth)
g) Clean the surfaces with alcohol or similar decreasing solvent. Lubricate the parts with Molykote G-n
paste.
2. Mount the lower grip to the actuator piston rod using the actuator-to-grip coupling.
46 Series 647 Hydraulic Wedge Grips Reference Manual
Installation