Pruebas y Ajustes 924G and 924GZ Wheel Loaders Hydraulic System

Pilot System Pressure - Test SMCS - 5050-032-PS

Cerrar SIS

Pantalla anteriorProducto: WHEEL LOADER Modelo: 924G WHEEL LOADER 3PZ Configuracin: 924G 924Gz Wheel Loader 3PZ00001-UP (MACHINE) POWERED BY 3056 Engine

Nmero de medio -RENR3511-03 Fecha de publicacin -01/03/2007 Fecha de actualizacin -09/03/2007

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Table 1Required Tools

Quantity Part Number Description 2 8T-0856 6000 kPa (870 psi) Pressure Gauge 2 177-7860 Hose Assembly 4 6V-4143 Coupler Assembly 2 6V-3989 Nipple

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

Dispose of all fluids according to local regulations and mandates.

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1. Remove the access panel on the right side of the machine.

1. Install a 8T-0856 Pressure Gauge on a 177-7860 Hose Assembly . Install the other end of the hose to the test port (2) for the steering pressure in the pressure reducing valve. Note: Prior to testing the pilot system pressure, make sure that the standby pressure of the steering pump is within the specification. The maximum standby pressure of the steering pump is 4300 170 kPa (625 25 psi).

2. Install a 8T-0856 Pressure Gauge on a 177-7860 Hose Assembly . 3. Install the other end of the hose assembly on the test port for the pilot pressure (1) .

Illustration 1 g00623972

Illustration 2 g00623709Pressure reducing valve

(1) Test port for the pilot oil pressure in the pressure reducing valve. (2) Test port for the steering pressure in the pressure reducing valve. (3) Relief valve.

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4. Start the engine and run the engine at high idle. With the oil at normal operating temperature, the pressure reading must be 2600 170 kPa (375.0 25.0 psi).

5. If the pressure reading is correct, stop the engine and remove the test equipment from pressure tap (1) . If the pressure reading is not correct, stop the engine. Perform the following procedure:

a. Loosen the locknut on the relief valve (3) . Turn the stem on the relief valve clockwise in order to increase the pressure. Turn the stem on the relief valve counterclockwise in order to decrease the pressure.

6. If the pressure reading is correct, stop the engine and remove the test equipment from the pressure tap (1) .

Copyright 1993 - 2011 Caterpillar Inc. Todos los derechos reservados. Red privada para licenciados del SIS.

Fri Sep 9 21:56:24 EST 2011

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