MTS Series 646 Hydraulic Collet Grips - Manual (Page 41)

Series 646 Hydraulic Collet Grips Installation 41
Required equipment
Equipment and materials required to install the grips include:
• Molykote G·n paste lubricant
• Each grip model/load unit combination has a unique attachment kit. The
appropriate attachment kit includes an installation drawing that shows what
components should be installed.
• Adequately sized wood blocks or plywood sheet (or equivalent).
• A lifting device and appropriately sized double swivel eyebolts as needed.
Axial Torsional Grip Installation Procedure
The following procedure assumes 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.
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 positions 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. Ensure that system hydraulic pressure
has been reduced to zero before proceeding.
E. Clean and lubricate all of the surfaces that will contact each other
(screw threads, spacers, and so forth). Clean the surfaces with alcohol
or similar degreasing solvent. Then lubricate the surfaces with
Molykote G•n paste.
2. Mount the lower grip.
Mount the lower grip to the actuator piston rod using the actuator-to-grip
coupling.
A. Remove the socket head cap screws from the lower coupling and place
the screws and coupling halves within easy reach and oriented properly
for installation on the grips.
B. Position the lower grip to align it with the connecting threads on the
actuator and stabilize the grip.
• Place appropriately sized wood blocks across the load unit base plate,
on opposite sides of the actuator piston rod.
• For heavy grips, insert the double swivel eyebolts into the threaded
holes provided on the grip chamber. Attach a lifting device to the
double swivel eyebolts and carefully raise the grip.