MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 62)

Model 505G2.20 - 505G2.30 SilentFlo™ HPU 62
Sampling the Hydraulic Fluid
Maintenance
4. Unscrew the filter housing and remove it from the HPU. Be careful not to
spill any hydraulic fluid.
5. Remove the disposable element from the manifold. Discard any fluid
contained in the filter housing and the filter element.
6. Wipe out any remaining sludge in the filter housing with a lint-free cloth.
7. Inspect the O-rings in the manifold for any sign of deterioration. If
necessary, replace the defective O-ring(s).
8. Insert a new filter element (MTS part number 010-053-349) in the housing
and screw the housing onto the manifold.
9. Turn on the HPU and switch to high-pressure mode. Inspect the seal
between the housing and the manifold for any signs of leakage. If leakage
occurs, repeat this procedure (without replacing the filter element). If
leakage persists, contact MTS Systems Corporation.
10. If you are changing the filter because the dirty filter indicator tripped, run
the HPU for two to four hours to remove contaminants. Then take a fluid
sample and have it analyzed.
Continue to clean the fluid if it does not meet an ISO cleanliness level of 13/
9 or better.
11. Press the Reset button on the HPU control panel to reset any interlocks and
turn off the Dirty Filter indicator.
Sampling the Hydraulic Fluid
This section describes how to check the quality of the hydraulic fluid. Review the
following hints before obtaining your sample:
• Avoid contamination.
– Keep the sample bottle in the storage box of the hydraulic fluid
sampling kit until it is needed.
– Do not remove the cap from the bottle until immediately before taking
the sample.
– Do not set the cap down on a dirty surface or in an area where airborne
dust can settle.
• For additional information on hydraulic fluid care, see the Hydraulic Fluid
Care Guide (part number 050-000-536) found in the documentation package
inside the electrical control box.
• Hold the hose valve assembly still when taking a sample.
• Do not let the hose sample assembly line touch the mouth of the bottle or go
into the bottle.
Prerequisite
You will need a hydraulic fluid sampling kit (part number 055-589-601).