MTS Series 646 Hydraulic Collet Grips - Manual (Page 39)

Series 646 Hydraulic Collet Grips Installation 39
F. Turn on hydraulic pressure and slowly raise the lower grip until the
stud on the upper grip just makes contact with the force transducer.
Reposition the grip, as necessary, for proper thread alignment.
G. Slowly screw the grip into the force transducer until it is snug.
4. Align the grips.
Once the grips are lightly tightened, check the alignment between the upper
and lower grips.
The rotational alignment is critical when you use collets for flat specimens.
Otherwise the rotational alignment is only needed to get the hydraulic
connections in a convenient location and precise alignment is not required.
Align the lower grip as necessary for the desired hydraulic hose
connections. If the actuator rod cannot be rotated, remove the lower grip and
install one or more shim washers or adjust the spiral washers. Reinstall the
grip (go back to Step 2).
Align the upper grip opening with the lower grip. If proper alignment is not
possible, remove the upper grip and install one or more shim washers or
adjust the spiral washers. Reinstall the grip (go back to Step 3).
5. Install the collets.
6. Connect the hydraulics.
Turn the hydraulic pressure off. Ensure that system hydraulic pressure has
been reduced to zero before proceeding.
Using the provided hydraulic hoses, make connections between the pressure
and release ports on the grip and the pressure and release ports on the
external hydraulic grip supply. See your hydraulic grip supply manual for
the port locations.
7. Tighten the grips.
See “Preloading the Spiral Washers” to preload the connector stud and
return to this procedure when done.
8. If applicable, install the cooling kit.
Use provided magnets to attach water cooling manifold to a convenient
location on the load frame.
Make the connections between the grips and the manifold for the optional
water cooling kit as shown in the water cooling section.