AD30 Underground Articulated Truck Hydraulic Tank Screen - Clean Caterpillar


Hydraulic Tank Screen - Clean
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------ WARNING! ------

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.

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NOTICE

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, "AVSpare Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on AVSpare products.

Dispose of all fluids according to local regulations and mandates.


There is one suction screen in the hydraulic tank. There is one return screen in the hydraulic tank. Clean both screens whenever there is a failure of the brake system, hoist system or another hydraulic component that uses oil from the hydraulic tank. Clean the screens in order to remove the debris.




    Illustration 1g00992944

  1. Relieve the hydraulic tank pressure by pushing on top of breaker relief valve (1) before removing the oil filler cap.



    Illustration 2g01126166

  1. Remove oil filler cap (3) slowly to relieve any remaining pressure.



    Illustration 3g00992947

    Note: Hand tighten the NPT pipe nipple. Do not use tools.

  1. 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.



    Illustration 4g00993358

  1. Remove return tube (8) , bolt (9) and cover (7) .

  1. Remove the valve and return screen assembly.

  1. Wash the valve and return screen assembly in clean, nonflammable solvent.

  1. Install the valve and return screen, cover (7) , return tube (8) and bolt (9) .



    Illustration 5g00993359

  1. Remove suction tube (10) .

  1. Remove the suction screen from the hydraulic tank.

  1. Wash the suction screen in clean, nonflammable solvent.

  1. Install the clean suction screen, the suction tube and the retaining bolts.



    Illustration 6g01126197

  1. Remove guard (11) .

  1. Remove front cover (12) from the hydraulic tank.

  1. Clean the debris from the bottom of the hydraulic tank.

  1. Clean the cover for the front of the hydraulic tank in clean, nonflammable solvent. Clean the sealant from the cover sealing surfaces. Install new sealant.

  1. Install cover (12) to the front of the tank.

  1. Install guard (11) .

  1. Fill the hydraulic tank with clean oil.

    Reference: For 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.

  1. 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) .

  1. Start the engine and run the engine at low idle. Check for leaks.

  1. 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 tubes and the hose clamps.

  1. Stop the engine.

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

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