CARRIER AS-DIFFERENTIAL 1049406 - Caterpillar

Cat HYDO Advanced 10 Oil Change Interval
The standard Cat HYDO Advanced 10 oil change interval is every 3000 service hours or 18 months.A 6000 service hour or 3 year maintenance interval for hydraulic oil (change) is available. The extended interval requires S O S monitoring of the hydraulic oil. The interval for S O S monitoring is every 500 hours. The maintenance interval for the hydraulic oil filter is not changed.Procedure to Change the Hydraulic Oil
Take extreme care to insure the cleanliness of the hydraulic oil. Keep the hydraulic oil clean in order to extend the component life and assure the maximum performance.
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Remove the hydraulic tank cap.
Wash the hydraulic tank cap in clean, nonflammable solvent.
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The drain plug is located on the bottom of the hydraulic oil tank. Remove the drain plug. Drain the fluid into a suitable container. Note: Dispose of the used oil in a proper manner. Refer to the Operation and Maintenance Manual, "General Hazard Information" for information that pertains to containing fluid spillage.
Replace the drain plug.
Refill the hydraulic tank with clean, filtered hydraulic oil. Refer to the Operation and Maintenance Manual, " Capacities (Refill) and Lubricant Viscosities".
Add the oil through the filler tube.
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Observe the level of the hydraulic oil in the sight glass. Maintain the oil level within the sight glass. When the oil is at ambient temperature, the oil should be visible within the bottom of the sight glass.