MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 100)

Model 505.60 - 505.180 SilentFlo™ HPU 100
Sampling the Hydraulic Fluid
Maintenance
1. Operate the HPU until the hydraulic fluid is at normal operating temperature
(about 30 minutes).
2. Open the bottom side panel to access the control manifold.
3. Close the needle valve. Connect the hose valve assembly to the sample port
located on the control manifold.
Location of Sample Port on Control Manifold
4. 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.
5. 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.
6. 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 table, “Appearance of Hydraulic Fluid Sample” for indicators of
unacceptable fluid qualities.
7. If there still is any uncertainty regarding fluid quality, obtain another sample
of the fluid and have it analyzed. The fluid tests should include chemical
analysis, particle count, and viscosity checks. Most oil companies have
facilities for performing these tests, or consult MTS Systems Corporation.
Open panel to access manifold
Control Manifold
Needle
Valve
Sample
Port
Hose Valve Assembly