MTS Model 512-14 Hydraulic Power Unit - Manual (Page 32)

512.14 Hydraulic Power Unit 32
Sampling the Hydraulic Fluid
Maintenance
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) 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.
1. Operate the HPU until the hydraulic fluid is at normal operating temperature
(about 30 minutes).
2. Close the needle valve. Connect the hose valve assembly to the sample port
located on the hydraulic manifold.
3. Open the needle valve on the hose valve assembly and flush 1 liter (1 quart)
of hydraulic fluid though the sampling assembly. This fluid can be directed
to a waste container or back into the HPU reservoir.
Needle Valve
Adapter