FRAME AS-UPPER 2868463 - Caterpillar

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Operate the machine for a few minutes in order to warm the hydraulic system oil.Park the machine on level ground. Engage the parking brake and stop the engine.
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Relieve the hydraulic tank pressure by pushing on top of breaker relief valve (1) before removing the oil filler cap.
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Remove oil filler cap (3) slowly to relieve any remaining pressure.
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Note: Hand tighten the NPT pipe nipple. Do not use tools.
Remove hydraulic tank drain plug (6) . Install a 1 inch NPT pipe nipple, 88 mm (3.50 inch) long, in the bottom of the tank, to open the internal drain valve. Drain the oil into a suitable container.
Remove the pipe nipple. Clean the drain plug and install the drain plug.
Change the hydraulic system pilot oil filters.ReferenceFor the correct procedure, refer to the Operation and Maintenance Manual, "Hydraulic System Oil Filter (Pilot) - Replace" for the machine that is being serviced.
Remove the strainer from the hydraulic oil filler tube.
Wash the oil filler cap and the strainer in clean, nonflammable solvent. Allow the oil filler cap and the strainer to dry.
Inspect the oil filler cap gasket. Use a new gasket if the used gasket is damaged. Install the strainer in the filler tube.
Fill the hydraulic tank with clean oil.ReferenceFor information on lubricants and refill capacities, refer to the Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the machine that is being serviced.
When the dump body is fully raised ensure the hydraulic oil level is in the "SAFE START BODY RAISED" range of lower sight gauge (5) .
Start the engine and run the engine at low idle. Check for leaks.
For machines equipped with a dump body check the oil level with the body fully lowered. For machines equipped with an ejector body check the oil level with the ejector plate fully retracted and the tailgate fully raised. With the oil cold maintain the hydraulic oil level to the "FULL COLD" mark in sight gauge (2) . With the oil at operating temperature, maintain the hydraulic oil level to the "FULL WARM" mark in sight gauge (2) . Add more oil, if necessary through filler tube (4) .Note: The oil must be free of bubbles. If bubbles are present in the oil, air is entering the hydraulic system. Inspect the hydraulic suction line hoses and the hose clamps.
Stop the engine.
If necessary, tighten any loose clamps or any loose connections. Replace any damaged hoses.