MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-30 - Manual (Page 62)

Model 505.20 - 505.30 SilentFlo™ HPU 62
Replacing the Return Line Filter
Maintenance
2. Open the top of the HPU with a 8-mm (5/16-inch) allen wrench.
Return Line Filter Component Identification
3. Check the output pressure gage. Be sure the pressure is at zero before
proceeding.
Note You can remove the filter from the top of the HPU if you are careful. If
you want easier access to the filter, you can remove the front panel. The
front panel is secured to the HPU with screws along each side and the
bottom of the panel.
4. Unscrew the filter housing and remove it from the HPU. Be careful not to
spill any hydraulic fluid.
5. Remove the disposable element from the manifold. Discard any fluid
contained in the filter housing and the filter element.
6. Wipe out any remaining sludge in the filter housing with a lint-free cloth.
7. Inspect the O-rings in the manifold for any sign of deterioration. If
necessary, replace the defective O-ring(s).
8. Insert a new filter element (MTS part number 010-053-349) in the housing
and screw the housing onto the manifold.
9. Turn on the HPU and switch to high-pressure mode. Inspect the seal
between the housing and the manifold for any signs of leakage. If leakage
occurs, repeat this procedure (without replacing the filter element). If
leakage persists, contact MTS Systems Corporation.
10. If you are changing the filter because the dirty filter indicator tripped, run
the HPU for two to four hours to remove contaminants. Then take a fluid
sample and have it analyzed.
Continue to clean the fluid if it does not meet an ISO cleanliness level of 13/
9 or better.
Output
Pressure
Gage
Filter
Housing