Usage:
950G (4BS),
950G (2JS),
950G (6NS),
950G (8DS),
950G (3JW),
950G (5FW),
950G (8JW),
950G (5MW),
950G (4BS),
962G (5AS),
962G (3BS),
962G (9BS),
962G (5RS),
962G (4PW),
962G (7BW),
962G (6EW),
962G (6HW) Wheel Loaders;
IT62G (6PS),
IT62G (6PS) Integrated Toolcarriers
Reference: Service Manual Module, SEBU7018-02, Operation and Maintenance Manual, 950G Wheel Loader, 962G Wheel Loader, and IT62G Integrated Toolcarrier; Page 204, "Hydraulic System Oil - Change".
A new procedure is being used to change the hydraulic oil. This procedure prevents the hydraulic oil level from descending below the suction ports.
NOTE: The following procedure should be used for all models.
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Care must be taken to ensure that fluids are contained during performance of inspection, testing, adjusting and repair of the machine. 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 Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.
Dispose of all fluids according to local regulations and mandates.
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1. Operate the machine in order to warm the hydraulic oil.
2. Park the machine on level ground. Lower the bucket to the ground and apply slight downward pressure. Engage the parking brake and stop the engine.
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Never start the engine in order to purge the system of oil or any other reason while the hydraulic tank is being drained. Excessive wear and damage to the hydraulic components can occur.
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3. The hydraulic tank is located on the right side of the machine. Press the button on the breaker relief valve in order to relieve any pressure. The breaker relief valve is located on the top of the hydraulic tank.
4. Remove the drain plug from the bottom of the hydraulic oil tank. Wash the drain plug in a clean, nonflammable solvent.
5. Install a 6B-3156 Pipe Nipple in order to unseat the drain valve. Allow the oil to drain into a suitable container.
6. Remove the pipe nipple in order to close the drain valve. Install the drain plug.
7. Change the hydraulic system filter.
Reference: For additional information on changing the hydraulic system filter, refer to the Service Manual module, Operation and Maintenance Manual, "Hydraulic System Oil Filter - Replace" for the machine that is being serviced.
8. Fill the hydraulic tank. Make sure that the oil level is at the "Full" mark on the sight gauge.
Reference: For additional information on the correct type of oil and the correct amount of oil, refer to the Service Manual module, Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the machine that is being serviced.
9. Start the engine and run the engine at low idle for 10 to 15 seconds. After 10 to 15 seconds stop the engine.
10. Add hydraulic oil to the hydraulic oil tank until the level is at the "Full" mark on the sight gauge. Install the hydraulic tank filler cap.
11. Start the engine and run the engine at low idle. Cycle the implements so that all of the hydraulic systems are filled with oil.
NOTE: If the alert indicator for a low oil level comes on, stop the engine immediately. If the fill process is followed correctly, the alert indicator for a low oil level should never come on.
12. Add oil to the hydraulic tank until the level is at the "Full" mark on the sight gauge. Install the hydraulic tank filler cap.
13. After cycling all of the hydraulic components, stop the engine.
14. Add hydraulic oil to the hydraulic oil tank until the level is at the "Full" mark on the sight gauge.
15. If necessary, tighten any loose clamps or any loose connections. Replace any damaged hoses.
16. Inspect the gasket on the hydraulic tank filler cap for damage. Replace the gasket, if necessary. Install the filler cap.