ELECTRICAL GP 5263890 - Caterpillar

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Open the right engine access door and the left engine access door in order to change the hydraulic oil.
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The drain plug for the hydraulic tank is located behind the engine access door on the left side of the machine. Remove the drain plug (1). Drain the hydraulic oil into a suitable container. Dispose of the used oil in a proper manner.
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The location for the air cleaner assembly
Install the drain plug (1) for the hydraulic oil tank.
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Remove hose (3) .
Remove strainer (2). Clean the strainer in a nonflammable solvent. Dry the strainer with pressure air.
Install strainer (2) .
Install hose (3) .
Install the air cleaner assembly.
Replace the hydraulic oil filter. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil Filter - Replace" for more information.
Refill the hydraulic tank with clean, filtered hydraulic oil. Refer to the Operation and Maintenance Manual, "Refill Capacities and Lubricant Viscosities".
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Add the oil through the filler tube. Clean the cap and install the cap (4) .
Maintain the oil level to the mark on the sight gauge (5) .