FILTER-CAB AIR 5050158 - Caterpillar

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Pull the hood release lever (1) in order to open the engine access door (2) on the top of the machine.
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Remove the hydraulic tank filler cap that is located under the access panel on the top of the engine compartment.
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The hydraulic oil filter is located on the left side of the machine.
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Remove the filter element with a strap type wrench.
Clean the filter element mounting base. Remove any part of the filter element gasket that remains on the filter element mounting base.
Apply a light coat of oil to the gasket of the new filter element.
Install the new filter element by hand. When the gasket contacts the filter element mounting base, tighten the filter element for an additional three quarters of a turn.
Remove the hydraulic tank breather. Replace the old breather with a new breather.
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Maintain the hydraulic oil level in the sight gauge between the "MIN" mark and the "MAX" mark. Add oil, if necessary.
Inspect the gasket on the hydraulic tank filler cap for damage. Replace the gasket, if necessary.
Install the hydraulic tank filler cap.
Close the access door.