Daily Inspections - MTS Systems Landmark 370 Series Operation

Maintenance
What to Do
Lubricate the crosshead
locking bolts
Align the force
transducer
Check the
accumulators'
precharge pressures.
Adjust if necessary
Clean exposed actuator
piston rod
Change HSM filter
Perform 252
Servovalve
maintenance: change
filter
Perform 252
Servovalve
maintenance: adjust
mechanical null
Perform sensor
calibration

Daily Inspections

Before the start of each day's testing, do a quick inspection of the load unit. Following are typical things
that should be checked daily:
Ensure that there are no leaks from lifts or locks.
l
Check the drip pan and ensure that there are no leaks from the actuator, hydraulic service
l
manifold, servovalve, or accumulators.
Ensure that electrical connections are tight, with no frayed or poorly routed cables.
l
Ensure that hoses are routed properly, not wearing, and the fittings are not leaking.
l
120
Load Unit Maintenance Intervals (continued)
When to Do It
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).
After actuator or force transducer installation; when a better alignment
between the two is desired.
At least once a month; more often as required by operating conditions.
Weekly; more often as required by operating conditions.
When the indicator is in bypass position or when hydraulic fluid is
changed.
When servovalve performance has deteriorated.
After the valve balancing procedure (electrical compensation) has been
completed and the results are judged unsatisfactory.
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.
Landmark™ Test System Operation