MTS Series 647 Hydraulic Wedge Grips - Manual (Page 59)

d) 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.
e) 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.
f) 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.
4.
Warning:
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 eyebolts. Use the connector stud to help
control the grip balance.
Mount the upper grip to the force transducer on the crosshead using the appropriate stud, shims, spacer,
or spiral washers.
Note:
Ensure that the force transducer is aligned (see your load unit manual).
a) Thread the stud into the upper grip. The connector stud should turn freely. If any resistance is
encountered, disassemble and correct the problem before proceeding.
b) 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.
Series 647 Hydraulic Wedge Grips Reference Manual 59
Installation