MTS Series 647 Hydraulic Wedge Grips - Manual (Page 57)

Assembled
Weight Hydraulic
Chamber Piston
Extension Cylinder Wedge
Chamber Location Model
64 kg (142 lb) 16 kg (34 lb) 12 kg (26 lb) 5 kg (11 lb) 24 kg (52 lb) bottom
131 kg (288
lb) 37 kg (82 lb)
37kg (82 lb)
17 kg (37 lb)
24 kg (53 lb)
5 kg (11 lb)
7 kg (16 lb)
72 kg (158 lb)
72 kg (158 lb)
top
bottom
647.25
141 kg (310
lb)
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.
For an assembly reference, see Axial-Torsional Grip Installation Components on page 45.
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.
Warning:
The grips and their components can be heavy, which can make handling them awkward.
Dropping a grip or one of its components can cause injury to personnel and damage to
equipment.
Ensure that you take appropriate precautions while moving and positioning the grips and their
components.
Set up the load unit.
a) Turn on the system hydraulic pressure.
b) Position the actuator and crosshead as necessary to allow adequate room to install the grips.
c) Turn the hydraulic pressure off.
d) 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.
2. Disassemble the grips.
a) Place both grips on a clean work surface near the load unit.
Note the difference in length. The longer grip is the lower grip and the shorter grip is the upper grip.
Lay both grips on their side and block, as necessary, to prevent them rolling while being worked on.
Series 647 Hydraulic Wedge Grips Reference Manual 57
Installation