MTS Criterion Series 60 - Manual (Page 138)

Decommissioning Procedure
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 the 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 (2.36-3.15 in.) 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.
Warning :
The system pressure does not drop immediately to zero when the HPU 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. Cap each hose, port, and hard-line
component.
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.
7. Dispose of all hydraulic fluid in accordance with all local codes regarding hazardous materials handling
and disposal.
Follow internal safety policies for safe disposal of parts of the machine. For oils and greases that are
used on the machine, see the MSDS.
138 | MTS Criterion ™ Series 60
Decommissioning