MTS Hydraulic Service Manifold Model 293-12B - Manual (Page 49)

Warning :
Pilot pressure is always present as long as pressure is available from the HPU. Turning HSM
pressure on and off, or changing between low and high output pressure, does not affect the
pilot pressure output.
If residual hydraulic pressure exists, unexpected high-pressure fluid discharge and actuator
motion can result when removing the filter. This can cause injury to persons or damage to
equipment or both.
Ensure that the HPU is turned off and the output pressure is zero before replacing the pilot
pressure filter.
1. Turn the HPU off or remove hydraulic pressure from the hydraulic input of the HSM.
2.
Caution :
Do not remove the old filter element before you remove all contaminated fluid from around
the base of the element.
Failure to remove the contaminated fluid can cause erratic system operation due to
subsequent contamination of the system servovalve(s).
Ensure that the area around the base of the filter element is free of contaminated fluid
before you remove the element.
Place a drain pan under the filter bowl. To remove the filter housing, manually turn it clockwise as
viewed from above. Dispose of any fluid in the bowl in a suitable container.
3.
Caution :
Do not re-use a dirty filter element.
A dirty filter element can cause damage to the system equipment.
Ensure that a new element is installed.
Remove the filter element from the head and discard it.
4. Wipe the filter base dry with a clean, lint-free cloth.
5. Check the filter housing for signs of contamination (particles adhering to the inside of the bowl). If
contamination is present, check the system for wear or loss of seal integrity.
6. Clean and inspect the O-ring seal and replace if necessary. Lubricate the seal with a small amount of
clean hydraulic fluid.
7. Slide the new element onto the filter head center post and tighten the housing clockwise until it is
hand-tight.
8. Reset the pilot filter indicator by pressing it down.
Series 293 Hydraulic Service Manifold Product Information | 49
Maintenance