MTS Model 685.53 Grip Control Module - Manual (Page 11)

Installation Procedure
Model 685.53 Grip Control Module Installation 11
Installation Procedure
Installing a Model 685.53 Hydraulic Grip Control module consists of installing
the control panel and manifold in the load unit and making the hydraulic hose
connections to the upper and lower grips. The following procedure assumes that
the grips to be controlled by the hydraulic grip supply have been properly
installed on a load unit.
Never leave a crosshead unlocked.
It can drift slowly down when hydraulic pressure is turned off and damage
any test fixtures, grips, and specimen in its path.
Unlock the crosshead only to reposition it. Always lock the crosshead after
you have repositioned it.
1. Lock the crosshead on the load unit.
If the load unit has manual locks, tighten the crosshead clamping bolts
according to the sequence and torque settings specified in the load unit
product information manual.
If the load unit has hydraulic locks, use the Crosshead Lift/Lock
Controls to clamp the crosshead to its current position.
Wait 30 seconds for the locks to fully clamp the columns.
2. Turn off the load unit hydraulic pressure.
If you have a separate hydraulic service manifold, turn its hydraulic pressure
off also.
3. Switch off electrical power at the test controller.
Wait two minutes for pressure to fall to zero before opening any fittings.
4. Access the control panel.
A. Lift the baseplate cover to access the four screws securing the control
panel to the base.
Do not remove the control panel screws without restraining the possible
movement of the control panel.
The control panel is hinged. Unless restrained, the control panel will drop
when the screws that secure the control panel to the base are removed. The
control panel is heavy; when the last screw is removed, the control panel
will drop. possibly causing equipment damage.
When removing the screws that secure the control panel to the base, restrain the
panel to keep it from falling in an uncontrolled manner. When all screws are
removed, you can grasp the control panel and let it swing down in a controlled
fashion.
WARNING
CAUTION