MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 99)

Sampling the Hydraulic Fluid
Model 505.60 - 505.180 SilentFlo™ HPU Maintenance 99
C. Look inside the housing for signs of serious contamination such as
pieces of grit, rubber particles, and metal shards. Correct the cause of
this contamination before operating your system again.
4. Install the new elements.
A. Insert two clean elements, with the plastic union between them, into the
filter housing.
B. Insert the spring plate and spring.
C. Screw down the filter cap. Take care not to damage its O-ring and
backup ring. Torque the filter cap to the value stated on its label.
5. Operate the pump at low pressure for 5 minutes to remove air from the filter
housing. Check for leaks before going to high pressure operation.
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 sample line in the bottle or let it touch the mouth of the bottle.
Prerequisite
You will need a hydraulic fluid sampling kit (MTS part number
055-589-601) and a fluid analysis kit (MTS part number 011-860-301) or a clean,
180 ml sample bottle.
Hose Valve Assembly for Fluid Sampling
Procedure
Take a fluid sample from the reservoir to get a visual indication of the fluid level
and relative contamination. Clean hydraulic fluid is clear and has an amber color.
If the composition of the fluid appears to have changed, obtain a sample of the
hydraulic fluid from the sample port and check the fluid qualities.
Needle Valve
Adapter