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Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin. |
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
The standard Cat HYDO Advanced oil provides a 100% increase in the standard hydraulic oil change interval for Motor Grader hydraulic systems (4000 hours or 2 years versus 2000 hours or 1 year) over second and third choice oils - when following the maintenance interval schedule for oil filter changes and for oil sampling that is stated in the Operation and Maintenance Manual for your particular machine. 6000 hour or 3 year oil drain intervals are possible when using S·O·S Services oil analysis. Contact your Cat dealer for details.
Note: Non-Hydo Advanced hydraulic oils have a hydraulic oil change interval of 2000 hours or 1 year. By performing S·O·S oil analysis, the hydraulic oil change interval may be extended to 4000 Service Hours or 2 Years.
Note: S·O·S oil analysis must be performed at every 500 hours or 3 months to extend the hydraulic oil change interval. The results from the S·O·S oil analysis will determine if the hydraulic oil change interval may be extended. If S·O·S oil analysis is not available, the hydraulic oil change interval must remain at the minimum change interval determined by the type of hydraulic oil used. Refer to the Operation and Maintenance Manual, "S·O·S Information" for more information.
Operate the machine until the oil is warm.
Park the machine on a level surface with the front wheel straight ahead. Lower all attachments to the ground. Apply a slight downward pressure to the attachments. Center the articulation of the machine and install the frame lock pin. The frame lock pin must move freely in the frame. Move the front wheels to vertical and install the wheel lean bolt. Engage the parking brake. Stop the engine.
The hydraulic system oil tank is positioned behind the operator station at the center of the machine.
- Slowly remove hydraulic oil filler cap (1).
- Remote drain plug (3) is positioned on the left side of the machine, below the cab. Drain the oil into a suitable container.
- Replace the filter for the hydraulic system oil. See Operation and Maintenance Manual, "Hydraulic System Oil Filter - Replace" in the Maintenance Interval Schedule.
- Remove the filler screen from the filler tube in the hydraulic oil tank. Wash the filler screen in clean nonflammable solvent. Allow the filler screen to dry.
- Clean the drain plug and install the drain plug.
- Install the filler screen.
- Fill the hydraulic system oil tank. See Operation and Maintenance Manual, "Capacities (Refill)".
- Inspect the filler cap gasket. If the filler cap gasket is damaged, replace the filler cap gasket.
- Install the hydraulic oil filler cap.
- Start the engine. Run the engine for a few minutes.
- Maintain the oil level above the "MIN" mark on sight gauge (2). If necessary, add oil through the filler tube.
Note: The oil must be free from bubbles. If there are bubbles in the oil, then air is entering the hydraulic system. Inspect the suction hoses and inspect the clamps.
- Stop the engine.
- If necessary, tighten any loose clamps and tighten any loose connections. Replace any damaged hoses.
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| Illustration 1 | g06249967 |
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(1) Filler Cap
(2) Sight Gauge | |
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| Illustration 2 | g06249965 |