Load Unit: Position The Crosshead Manually - MTS Systems 318 Series Product Information

318 Load Unit: Position the Crosshead Manually

66 Operation
4. 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.
This procedure describes how to position a crosshead for a load unit with no
hydraulic crosshead lifts or locks.
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 (see the Crosshead Weight table below).
• 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.
The following procedure describes using an overhead crane to position the
crosshead. You may use any device that can lift the weight of the load unit.
Model 318.10 Model 318.25
57 kg (125 lb) 102 kg (225 lb)
1. Center the overhead crane directly over the load unit.
2. Attach the lifting chains to the lifting rings. Remove any slack in the lifting
chains while keeping chain tension to a minimum.
WARNING
Model 318.50
193 kg (425 lb)
318 Load Unit