1. Element very dirty.
Change element more
frequently to achieve
reasonable system hygiene. |
2. Element soft and spongy
indicating water.
If the element is changed it
will remove all the water
and re-claim the oil
completely. |
3. Element dirty and stocking
torn.
Indicates overdue element
change. Change element more
frequently. |
4. Element and oil golden.
Indicates ISO 14/11, or
better system hygiene.
Change element at normal
interval. |