MTS Series 646 Hydraulic Collet Grips User Manual
Page 38
Series 646 Hydraulic Collet Grips
38
Installation
D.
Position the lower grip to align it with the actuator rod. You might need
to stabilize the grip over the actuator.
•
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.
Important
NO STANDARD EYEBOLTS should be used to lift the grip.
E.
Turn on hydraulic pressure and raise the actuator rod until it just makes
contact with the connector stud. Reposition the grip, as necessary, to
center the stud over the actuator rod.
F.
Slowly screw the grip into the actuator rod, raising the actuator rod as
you go, until it is snug.
The connector stud should turn freely. If any resistance is encountered,
disassemble and correct the problem before proceeding.
G.
Turn the hydraulic pressure off. Ensure that system hydraulic pressure
has been reduced to zero before proceeding.
3. Mount the upper grip to the force transducer on the crosshead.
Note
Ensure that the force transducer is properly aligned with the actuator
(see your load unit manual).
A.
Place a small piece of compliant material (such as a piece of
styrofoam), to act as a spacer, inside the connector stud hole of the grip.
B.
Thread the mounting stud into the upper grip.
C.
Place a wooden spacer (a wood block or piece of plywood) on top of
the lower grip. The wooden spacer should be large enough to cover the
diameter of the grip.
The upper grips are very top heavy and will have a tendency to tip over
when lifted by the double swivel eyebolts.
Dropped grips can cause injury to personnel and damage to equipment.
Never attempt to control the grip by holding onto the double swivel eyebolts. Use
the connector stud to help control the grip balance.
Note
You will need help to balance the upper grip on the wooden spacer on
the lower grip. You will need to construct a proper support or have
someone available to help balance the upper grip on the lower grip.
D.
Carefully position the grip on top of the wooden spacer on the lower
grip. Ensure that the stud is facing up.
E.
Add any required shims, spacer, or spiral washers to the stud.
WARNING