MTS Series 647 Hydraulic Wedge Grips - Manual (Page 69)

a) Thread the stud into the lower extension rod. The connector stud should turn freely. If any resistance
is encountered, disassemble and correct the problem before proceeding.
b) Add any required shims, spacer, or spiral washers to the stud. The attachment kit drawing shows what
components (such as shims, spiral washers, and so forth) should be installed.
Note:
Ensure that you stabilize the wedge assembly while you install it.
c) Position the lower grip to align it with the connecting stud.
• 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.
d) Turn on hydraulic pressure and raise the actuator rod until the extension rod just makes contact with
the connector stud. Reposition the grip, as necessary, to center the stud over the extension rod.
e) Slowly screw the grip into the actuator rod, raising the actuator rod as you go, until it is snug. 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 properly aligned (see your load unit manual).
a) Thread the stud into the upper grip. The connector stud should 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.
c) Insert the double swivel eyebolts into the threaded holes provided on the grip chamber.
Series 647 Hydraulic Wedge Grips Reference Manual 69
Installation