MTS Criterion 60 - Manual - Manual (Page 91)

MTS Criterion™ Series 60 Product Manual Decommissioning 91
Decommissioning
The decommissioning process is performed when the system is going to be
moved or taken out of service. Disassembly is required when performing either
of these tasks.
To decommission the system:
1. Remove specimen and fixtures. Large grips should be removed if the load
frame is going to be tipped over.
2. Move the actuator piston rod down to its lowest position. Retract or open the
small piston on both grips to its lowest position.
3. Adjust the lower crosshead to keep 60-80 mm distance between the lower
crosshead jaw and the upper crosshead jaw. Insert supporting wooden
blocks between the lower crosshead and the test table.
4. Turn off the pump and open the ball relief valve. Allow time for pressure to
bleed off.
5. Isolate the system from electrical power.
When the system electronics, control software, and the system PC are powered
down, turn off the system’s main electrical supply and disconnect the main power
cable.
The system pressure does not drop immediately to zero when the HPO is
turned off .
Residual hydraulic pressure can produce a high pressure spray that can
hurt you.
Do not start this procedure unless the system has been isolated from hydraulic
pressure for at least 20 minutes. Always be cautious when you loosen any
hydraulic connection or remove bolts or screws from any hydraulic component.
Always allow fluid pressure to dissipate slowly until completely vented before
continuing to loosen. Always wear gloves and appropriate eye protection.
6. Remove all hydraulic hoses on the crossheads and the actuator.
The system does not have hydraulic reservoirs that must be drained.
However, each hose and hard line will potentially have trapped oil in it.
When removing the hydraulic components, ensure that you have drain pans
and towels available that are sufficient to handle the drain volume of the
item you are disconnecting. Use safe practices when removing hydraulic
components and allow any trapped or latent pressure to dissipate safely
through a loosened connection before removing the component. Cap each
hose, port, and hardline component.
WARNING