MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 70)

Model 505G2.20 - 505G2.30 SilentFlo™ HPU 70
Replacing the Pressure Line Filter Element
Accessories
6. Mount the filter assembly to the support with the 3/8-16 UNC screws, nuts
and washers.
7. Use the filter assembly to determine where the filter support should be
installed. Mount the filter support to the base of the HPU with the four 3/8 x
1-1/2 inch lag screws and washers.
8. Connect the high pressure hose between the filter assembly and the high
pressure output port.
9. Turn on the hydraulic pressure and check for leaks.
Replacing the Pressure Line Filter Element
The optional high pressure filter element should be replaced for the following
reasons:
• When the dirty-filter indicator lights
• Whenever the hydraulic fluid is changed
• The filter manufacturer’s recommended maximum interval has passed
(1000 hours or 6 months)
Prerequisite
You will need a filter element (MTS part number 011-970-652) or a filter kit
(MTS part number 100-078-098).
Procedure
To change the filter element:
Note The dirty-filter indicator may light when the HPU is first started due to low
hydraulic fluid temperature. When the HPU is at normal operating
temperature, recheck the indicator to determine if the element actually
needs replacement.
1. Turn off the HPU.
2. Open the top of the HPU with an 8-mm (5/16-inch) allen wrench.
3. Check the output pressure gage. Ensure that the pressure is at zero before
proceeding.
4. Unscrew the filter bowl. The filter element and filter bowl can be removed
as one assembly. Be careful not to spill any hydraulic fluid.
5. Remove the disposable element from the bowl. Discard any fluid contained
in the filter bowl.
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 into the bowl and reinstall the bowl assembly.
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.