Test Val Salida CT D8T

Pruebas y Ajustes D8T Track-Type Tractor Power Train

Relief Valve (Torque Converter Outlet) Pressure - Test and Adjust SMCS - 3133-036

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Producto: TRACK-TYPE TRACTOR Modelo: D8T TRACK-TYPE TRACTOR J8B Configuración: D8T Track-Type Tractor J8B00001-UP (MACHINE) POWEREDBY C-15 Engine

Número de medio -RENR7526-05 Fecha de publicación -01/02/2008 Fecha de actualización -29/02/2008

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Hydraulic oil pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can result if this pressure is not released before any service is done on the hydraulic systems. In order to prevent possible injury, release the hydraulic system pressure before working on any fitting, hose, or hydraulic component.

Lower all attachments to the ground before service is started. If the hydraulic system must be serviced, tested, or adjusted with the attachment in the raised position, the attachments and lift cylinders must be supported properly.

Always move the machine to a location away from the travel of other

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Introduction The torque converter outlet relief valve maintains a minimum pressure in the torque converter.

The following test procedure will verify whether the pressure setting is within the specified limits. The pressure setting may be adjusted by adding or removing shims.

Required Tools

machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made.

NOTICECare must be taken to ensure that fluids are contained during performance of inspection, maintenance, 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.

Dispose of all fluids according to local regulations and mandates.



Illustration 1 g01089423Tooling (A)



Illustration 2 g01089425Tooling (B) ( 6V-7830 Pressure Gauge (Tetragauge))

Table 1

Required Tools

Tooling Item Part Number Description Qty

A

A1 8T-0854 Pressure Gauge 1000 kPa (145 psi)

1

A2 6V-3989 Fitting 1

A3 6V-4143 Coupler 2

A4 177-7861 Hose As 41370 kPa (6000 psi)

1

B

B1 8T-0862 Pressure Gauge 500 kPa (72 psi)

1


1


1



Test Procedure 1. Move the machine to a smooth horizontal location.

2. Lower all of the implements.

3. Remove floorplate (1) from the machine.

B4 1U-5757 Hose As 41500 kPa (6020 psi)

1

B5 4S-6399 Connector 1

B6 6V-4144 Coupler 1

Illustration 3 g01103989



4. Attach tooling (A or B) to pressure tap (2) ("N").

5. Start the engine. Warm the power train oil to a temperature of 84° ± 8°C (183° ± 14°F).

Illustration 4 g01089981(2) Pressure Tap ("N")



6. Engage the service brakes by fully depressing the brake pedal.

7. Disengage the parking brake.

8. Upshift the transmission to THIRD SPEED FORWARD.

9. Operate the engine at HIGH IDLE. Make sure that the steering control lever is in the NEUTRAL position.

10. Check the pressure at THIRD SPEED FORWARD STALL. The pressure at tooling (A or B) should be 450 ± 70 kPa (65 ± 10 psi).

ReferenceSee Specifications, Systems Operation/Testing and Adjusting, "Pressure Charts" in this module.

11. If the pressure at tooling (A or B) is not within the specified limits, perform the following adjustment procedure.

Adjustment Procedure

Illustration 5 g01261895

(3) Torque Converter Outlet Relief Valve



1. Locate torque converter outlet relief valve (3). The torque converter outlet relief valve is located on torque divider (4). The torque divider is located behind the engine between the flywheel housing and the main drive shaft.

2. Remove bolts and washers (6). Remove cover (5) in order to get to shim (7) .

3. Add one shim (7) in order to increase the pressure setting or remove one shim (7) in order to decrease the pressure setting. One shim changes the pressure setting by 9.5 kPa (1.4 psi).

ReferenceRefer to the procedures in Disassembly and Assembly, "Torque Converter Outlet Relief Valve".

4. Reassemble the torque converter outlet relief valve.

(4) Torque Divider

Illustration 6 g01261902(5) Cover

(6) Bolts and Washers

(7) Shim



5. Perform Step 5 through Step 10 in "Test Procedure" in order to check the pressure at tooling (A or B) .

6. If the pressure at tooling (A or B) is within the specified limits, the test is complete.

Copyright 1993 - 2008 Caterpillar Inc. Todos los derechos reservados. Red privada para licenciados del SIS.

Wed Mar 26 18:00:15 UTC-0300 2008



Test Val Salida CT D8T

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