Instruction Manual

Replacing the Return Line Filter

Model 505G2.07/.11 SilentFlo™ HPU

Replacing the Return Line Filter

The filter element of the HPU should be replaced for the following reasons:

• When the dirty-filter indicator lights

• Whenever the hydraulic fluid is changed

• The maximum interval recommended by the filter manufacturer has passed

(1000 hours or 6 months)

Prerequisite You will need a filter element (MTS part number 100-009-495) or a filter kit

(MTS part number 100-030-195).

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.

Return Line Filter Component Identification

3. Check the output pressure gage. Ensure that the pressure is at zero before

proceeding.

4. Unscrew the filter cover. The filter element, bypass assembly, 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.

Output

Pressure

Gage

Filter

Assembly