Manually Clamp The Crosshead - MTS Systems Landmark 370 Series Product Information

Operation

Manually Clamp the Crosshead

Warning:
The crosshead is very heavy.
A dropping crosshead can crush hands, damage grips, and smash specimens.
Observe the following precautions to reduce the possibility of unexpected crosshead movement:
Ensure that the crosshead is locked.
The overhead crane and lifting chains must be able to support the weight of the crosshead.
Center the crane directly over the load unit.
Remove any slack in the lifting chains before unlocking the crosshead.
Completely loosen all crosshead locking bolts before attempting to move the crosshead.
Keep the columns clean and dry. The crosshead cannot be securely clamped to greasy or
damp columns.
Caution:
The crosshead can slowly drift down the columns if the locks are turned off and when hydraulic
pressure is turned off.
The crosshead can 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 and never leave the crosshead unlocked.
The manual clamping procedure is a four step process. The four steps allow the crosshead to be
clamped evenly.
Before clamping the crosshead in place, you must have determined the proper crosshead position and
moved the crosshead to that position.
Tighten the crosshead clamping bolts according to the torque settings shown in the Crosshead
Clamping Bolts Torque Values table found in the next section.
1. Torque the crosshead bolts to the value in Step 1.
2. Torque the crosshead bolts to the value in Step 2.
3. Torque the crosshead bolts to the value in Step 3.
70 MTS Landmark™ Tabletop Load Units - Product Information