
6. Install a new filter hand tight until the seal of the filter contacts the base. Note the position of the
index marks on the filter in relation to a fixed point on the filter base.
Note: There are rotation index marks on the filter that are spaced 90 degrees or 1/4 of a turn away
from each other. When you tighten the filter, use the rotation index marks as a guide.
7. Tighten the filter according to the instructions that are printed on the filter. Use the index marks as a
guide.
Note: You may need to use a Caterpillar strap wrench, or another suitable tool, in order to turn the
filter to the amount that is required for final installation. Make sure that the installation tool does not
damage the filter.
8. Maintain the hydraulic oil level to the middle of the sight gauge. Refer to Operation and Maintenance
Manual, "Hydraulic System Oil Level - Check". Do not overfill the hydraulic tank.
9. Inspect the gasket on the hydraulic tank filler cap for damage. Replace the hydraulic tank filler cap, if
necessary. Install the hydraulic tank filler cap.
10. Close the engine access door.
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