Sampling the hydraulic fluid – MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-180 User Manual
Page 86
1. Turn off the HPU. Ensure that the hydraulic pressure is at zero before proceeding. Wait until all pressure
gages read zero before starting the next step.
2. Remove the dirty filter element.
a) Use a 7/8 inch socket or wrench to unscrew the filter cap.
b) Remove the spring, spring plate, and two dirty filter elements.
c) Save the plastic union that commons the two filter elements. Discard the dirty elements, following
applicable environmental guidelines.
Warning:
When working with hydraulic components, hydraulic fluid can spill and collect on floors or
work platforms.
Floors or work platforms with spilled hydraulic fluid are very slippery. Injury or death can result
from personnel falling on slippery surfaces.
Do not allow personnel to stand on or walk through hydraulic fluid. Place warning signs around
the spill area to alert personnel of the hazard. Clean and dry the spill promptly.
3. Clean and inspect the filter housing.
a) Clean and inspect the filter cap O-ring and backup ring. Replace them if necessary.
b) Lubricate the O-ring with clean hydraulic fluid.
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.
86 Series 505G2 SilentFlo™ Hydraulic Power Unit Product Information
Maintenance