Maintenance
90 MTS Landmark™ Tabletop Load Units - Product Information
Other Maintenance Tasks
The following table lists the recommended interval for each of these procedures.
What to Do When to Do It
Make daily inspections Before the start of each day’s testing.
Clean the load unit columns. When the columns become greasy or dirty.
Prevent rust Depends on the operating environment; more often in
humid environments.
Maintain airmount pressures When the load unit sits unevenly.
Adjust the hydraulic locks When the crosshead sticks or moves jerkily on the
column.
Lubricate the crosshead locking
bolts
Whenever they begin to be hard to tighten or sticky
when loosened.
When the bolts begin to loosen or tighten stiffly (manual
locking crossheads only).
Align the force transducer After actuator or force transducer installation; when a
better alignment between the two is desired.
Check the accumulators’
precharge pressures
Adjust if necessary
At least once a month; more often as required by
operating conditions.
Clean exposed actuator piston
rod
Weekly; more often as required by operating conditions.
Change the HSM filter When the indicator is in bypass position or when
hydraulic fluid is changed.
Change the filter in the
servovalve
When servovalve performance has deteriorated.
Adjust mechanical null in the
servovalve
After the valve balancing procedure (electrical
compensation) has been completed and the results are
judged unsatisfactory.
Perform sensor calibration Calibration intervals depend on system requirements
and are typically performed during scheduled
maintenance by MTS trained personnel. Sensors can
include LVDT, load cell, and extensometer.
Load Unit Maintenance Intervals
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