Hydraulic Oil - Wittke STARLIGHT Maintenance Manual

Figure 7-24 Removing filter element
5.
Inspect the O-rings (on filter and on cover plate) and the housing for damage. Replace as
necessary.
Figure 7-25 Seal on cover plate
6.
Moisten sealing surfaces (with oil) on the filter housing and cover plate.
7.
Install the element into the housing, carefully locating the element onto the spigot.
8.
Replace the cover plate.
9. Engage the hydraulic system and check for leaks.

Hydraulic Oil

Factory filled oil is tested for cleanliness. Hydraulic oil is the lifeblood of the system. Particles in the
oil will devastate any hydraulic system over time. Therefore, regular oil changes will most likely
extend the life of components and equipment.
Oil should be changed when it becomes oxidized, when it has a significant change in color and/or
becomes milky or cloudy. Laboratory analysis is an effective method of obtaining accurate
information on the cleanliness of hydraulic oil.
Hydraulic System 105