MTS Landmark Tabletop - Manual (Page 85)

Warning:
Over time, repeated cycling and stress pressures on the cap screws can cause cap screw failure.
The cap screw can become a projectile, resulting in equipment damage and personal injury.
After 5 years or 5500 duty cycles, contact MTS for replacement of the hydraulic crosshead lock
cap screws.
1. Turn on electrical power at the controller. Do not turn on hydraulic pressure yet.
2. If the crosshead is already at a comfortable working level with no specimen installed, proceed to Step 3.
If not, position the crosshead to a comfortable working level.
a) Reset any active interlocks at the test controller.
b) Turn on high hydraulic pressure.
c) If there is a specimen in the load unit, remove it.
d) Move the crosshead to a comfortable working height.
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.
3. Use the Lock Control to lock the crosshead. Then torque the manual crosshead locking bolts in the order
shown in the following illustration.
Crosshead Fastener Torque Values
Description Item
136 N·m (100 lbf·ft) 1
MTS Landmark™ Tabletop Load Units Product Information 85
Maintenance