MTS Model 512-04 Hydraulic Power Unit - Manual (Page 30)

Model 512.04 Hydraulic Power Unit 30 Maintenance
Changing the Filter
Change the filter whenever the filter change gage’s needle stays in the
yellow or red zone with the hydraulic fluid at operating temperature.
Also, change the filter whenever you change the hydraulic fluid.
Special equipment needed–
• Oil filter wrench
• 3–micron oil filter (part number 119515-21)
1. Press STOP to turn the hydraulic power unit (HPU) off.
2. Use an oil filter wrench to loosen the old filter. Screw the filter
counterclockwise to remove it.
3. Wet the new filter’s gasket with clean hydraulic fluid.
4. Screw the filter clockwise to install it. Turn the new filter until its
gasket touches its sealing surface. Than hand tighten the filter 1/2
turn.
NOTE Tightening the filter with a wrench will not make it seal better, but it
will make it harder to remove the next time.
5. Start the pump in low to purge the air from the hydraulic lines and
components.
6. Set the HPU’s output to HIGH PRESS. Let the HPU run a few minutes
and check for leaks.
CCW
Change Filter