Replacing the return-line filter, About clamp-style housing filter replacement, Required equipment – MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-180 User Manual
Page 80: Procedure
2. Turn off the water flow to the HPU (this prevents the heat exchanger from working).
3. Monitor the temperature on the Main Display on the user interface. When the hydraulic fluid temperature
exceeds 55°C (131°F), HPU Run Status should flash between Faulted and Over Temp. If Over Temp
does not display, replace the low level assembly.
4. Turn on the water flow to the HPU.
5. Press the Reset button to clear the interlock and turn the indicator off.
Replacing the Return-line Filter
The standard fine filter for the Model 505.60/.90 and Model 505.120/.180 HPUs is a return-line filter. The
HPU will have one of two filter housing designs. The filter housing design is distinguished by the method used
to secure the cover. Either a clamp holds the cover to the head assembly or cap screws secure filter cap.
There is also an optional high pressure filter that can exist on any particular unit.
About Clamp-Style Housing Filter Replacement
The return-line filter element of the HPU should be replaced for the following reasons:
•
When the dirty-filter detector trips
•
Whenever the hydraulic fluid is changed
•
The filter manufacturer’s recommended maximum interval (1000 hours or 6 months)
Required equipment
•
Filter element (MTS part number 100-015-519)
•
O-rings (MTS part number 100-030-032 and 100-030-053)
OR
•
MTS Filter Element Seal Kit part number (100-030-199)
Procedure
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. Ensure that the hydraulic pressure is at zero before proceeding.
80 Series 505G2 SilentFlo™ Hydraulic Power Unit Product Information
Maintenance