MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 63)

Sampling the Hydraulic Fluid
Model 505G2.20 - 505G2.30 SilentFlo™ HPU Maintenance 63
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.
Control Manifold
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 control manifold.
3. Open the needle valve 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.
4. Obtain a sample of the hydraulic fluid after flushing the valve hose
assembly.
A. Without closing the valve, quickly place the sample bottle into the fluid
stream (keep the sample bottle sealed until the sample is to be taken).
B. Fill the sample bottle (175 mL/6 oz) with fluid.
C. Close the valve on the hose valve assembly and cap the sample bottle.
5. Check the fluid qualities of the sample by comparing it to a small jar of
clean hydraulic fluid. Clean hydraulic fluid has an amber color.
Consult the “Appearance of Hydraulic Fluid Sample” table for unacceptable
fluid qualities.
Filler Cap
Sample Port
Control Manifold
Fluid Level
Sight Gage
Needle Valve
Hose Valve
Assembly