2570D, 2670D Wheel Feller Buncher Caterpillar

Selection of the Oil Change Interval

Your machine may be able to use an extended interval for the hydraulic oil. The hydraulic oil is in the system that is not integral to the service brakes, the clutches, the final drives, or the differentials. The standard change interval is listed in the Operation and Maintenance Manual, "Maintenance Interval Schedule". The oil should be monitored during intervals of 500 hours. The extended interval can be used if the following criteria are met.

HYDO Advanced 10

Cat HYDO Advanced 10 is the preferred oil for use in most Cat machine hydraulic systems when ambient temperature is between −20 °C (−4 °F) and 40 °C (104 °F). Cat HYDO Advanced 10 has an SAE viscosity grade of 10W. Cat HYDO Advanced 10 has a 50% increase in the standard oil drain interval (up to 3000 hours) for machine hydraulic systems over second and third choice oils when you follow the maintenance interval schedule for oil filter changes and for oil sampling that is stated in the Operation and Maintenance Manual. 6000-hour oil drain intervals are possible when using S·O·S Services oil analysis. When you switch to Cat HYDO Advanced 10, cross contamination with the previous oil should be kept to less than 10%. Consult your Cat dealer for details about the benefits from the improved performance designed into Cat HYDO Advanced 10.

Oil Filters

Cat oil filters are recommended. The interval for changing the oil filter is listed in the Operation and Maintenance Manual, "Maintenance Interval Schedule".

Note: A warning for the hydraulic filter bypass will be shown on the graphical display, if the hydraulic oil filter needs to be replaced prior to the service interval.

Oil

An extended 6000-hour interval for changing the oil is specific to HYDO Advanced 10.

An extended 4000-hour interval for changing the oil is for the following oil types.

• Cat Hydraulic Oil (HYDO)

• Cat Transmission and Drive Train Oil (TDTO)

• Cat TDTO-TMS

• Cat Diesel Engine Oil

• Cat Biodegradable Hydraulic Oils (HEES)

• Cat Multipurpose Tractor Oil (MTO)

• Heavy-duty diesel engine oils with a minimum zinc content of 900 ppm

If Cat oils cannot be used, use heavy-duty oils with the following classification: Cat ECF-1, API CG-4, API CF and TO-4. These oils must have a minimum zinc additive of 0.09 percent (900 ppm).

Note: Industrial hydraulic oils are not recommended in Cat hydraulic systems.

Other References

Reference: Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations"

Reference: Special Publication, SEBU5898, "Cold-Weather Recommendations for All Caterpillar Machines"

Reference: Special Publication, PEDP7035, "Optimizing Oil Change Intervals"

Reference: Special Publication, PEDP7036, "S·O·S Fluid Analysis"

Reference: Special Publication, PEDP7076, "Understanding the S·O·S Oil Analysis Tests"

Monitoring the Condition of the Oil

The oil should be monitored during intervals of 500 hours. Cat standard SOS Fluids Analysis or an equivalent oil sampling program should be used.

The current guidelines for cleanliness of the oil should be observed. Refer to "Measured Data".

If an oil sampling program is not available, the standard 3000-hour oil change interval should be used.

Measured Data

The following information should be monitored through sampling of the oil:

• Significant changes in wear metals should be monitored. These metals include iron, copper, chromium, lead, aluminum, and tin.

• Significant changes in the following additives should be monitored: zinc, calcium, magnesium, and phosphorus.

• Contaminants should not be present. These contaminants include fuel and antifreeze. Water content should be .5 percent or less.

• The silicon level should not exceed 15 ppm for new oil. The particle counts should be monitored.

• The recommended level of cleanliness for Cat machines that are operated in the field is ISO 18/15 or cleaner. The cleanliness should be monitored by particle count analysis. The levels of contamination should not exceed the normal by more than two ISO codes. Action should be taken to determine the cause of the contamination. The system should be returned to the original levels of contamination.

• There should not be significant changes in sodium, silicon, copper, and potassium.

• The allowable level of oxidation is 40 percent (0.12 Abs units).

• The kinematic viscosity of 100 °C (212 °F) oil should not exceed a change of more than 2 cSt from new oil.

Procedure for changing the Hydraulic Oil

1. Operate the machine to warm the hydraulic oil.

2. Park the machine on level ground. Lower the implement to the ground. Engage the parking brake and stop the engine.
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   Personal injury or death could result when the access plate is unscrewed from the machine. Be careful when removing the bolts from the access plate. When all of the bolts are removed, the access plate will swing away from the machine. Position yourself out of the path of the access plate or use two people when removing the access plate.

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3. The hydraulic tank is located in the rear frame of the machine. Access the breaker relief valve through the cover panel (1).
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4. Press the button on the hydraulic tank breaker relief valve (2) to release the pressure in the hydraulic system. Allow the pressure to escape completely before you proceed.
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5. Open the rear lower access door.

6. Locate hydraulic oil drain hose and drain valve (3).

7. Open valve to drain hydraulic oil tank.

8. Drain the hydraulic oil into a suitable container.
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   NOTICE
   Never start the engine while the hydraulic oil tank is being drained or while the hydraulic oil tank is empty. Excessive wear and damage to the hydraulic components can occur.

9. Install the drain hose plug .
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10. Change the hydraulic oil filters (4 and 5).

    Reference: Refer to Operation and Maintenance Manual, "Hydraulic System Oil Filter - Replace" for the correct procedure.

11. Remove cab guard. Clean area around hydraulic oil fill tube (6).
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    Illustration 6	g06096624

12. Connect hydraulic fill hose (stored in the right-hand rear door) . Place the filler hose in the hydraulic oil. Open diesel fuel fill door, access hydraulic oil fill pump.

    Reference: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the correct type of oil and for the correct amount of oil.

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    Illustration 7	g06096687

13. Access hydraulic oil fill pump switch (7) in the diesel fill compartment to fill the hydraulic tank. Fill the hydraulic tank with clean oil. Make sure that the oil level is at the "FULL" mark on the sight gauge.

14. Start the engine and run the engine for at least 10 seconds. Then, stop the engine and add hydraulic oil to the tank until the oil level is at the "FULL" mark on the sight gauge.

15. Start the engine and run the engine at low idle. Cycle the implements so that all hydraulic systems are filled with oil.

    Note: If the alert message for a low oil level comes on, stop the engine and immediately add oil to the hydraulic tank. The oil level should not be below the suction ports in the hydraulic tank while the engine is running.

16. Stop the engine. Top off the hydraulic tank so that the oil level is at the "FULL" mark on the sight gauge.

    Note: The oil must be free of air bubbles. If air bubbles are present in the hydraulic oil, air is entering the hydraulic system. Inspect the hydraulic suction line and the hose clamps.

17. Remove the filler hose from the hydraulic oil and clean the filler hose. Replace the filler hose to storage location. Replace cab guard.

18. If necessary, tighten any loose clamps or any loose connections. Replace any damaged hoses.