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BUCKET AS.-GP 2389700 - Caterpillar



2389700 BUCKET AS.-GP Caterpillar parts BUCKET
Rating:
71
Alternative (cross code) number:
CA2389700
238-9700
2389700
Caterpillar 2389700 BUCKET AS.-GP

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Illustration 1 g01279726
Fan drive pump
(1) Current adjustment screw
(2) Pressure and flow compensator valve
(3) Displacement solenoid
(4) High-pressure cutoff valve Pressure and flow compensator valve (2) is mounted to the case of the fan drive pump. The fan drive pump is mounted to the steering pump. The steering pump is mounted to the pump drive. The pump drive is located on the inside of the right frame rail near the torque converter.The fan will overspeed if all of the following conditions exist:
the engine is operating at high idle.
the setting of high-pressure cutoff valve (4) is too high.
displacement solenoid (3) is disconnected.A fan overspeed error occurs at approximately 895 rpm.If problems are suspected, the first step is checking the override pressure for the pump. Make sure that the override pressure is correct. The following procedure should be performed before running any of the fan tests at full speed to ensure that fan overspeed does not occur.Note: Maximum pressures may need to be set differently at high altitudes to avoid possible fan overspeed and damage.
Pressure and Flow Compensator Valve
Illustration 2 g01279733
(1) Current adjustment screw
(3) Displacement solenoid
(4) High-pressure cutoff valve
(5) Adjustment screw for the high-pressure cutoff valve Note: There is no procedure for adjusting current adjustment screw (1) at this time.Note: There are two methods that can be used to view fan speeds:
Use the Caterpillar Electronic Technician (ET) service tool and view the data with the VIMS display window.
Use the Cat ET service tool and a laptop computer that is installed with VIMS-PC software.
Install the Cat ET service tool onto a laptop computer and connect the laptop computer to the machine in order to override the fan speed. For more information on the use of the Cat ET service tool, refer to the Special Instruction.
Start the engine.
Use the following procedure in order to configure a group of parameters within Cat ET service tool, that will be monitored.
On the Cat ET screen, select Datalink. From the ECM list, choose the Brake ECM.
From the Status Group, create a new group that is called Fan Test.
The following parameters should be inserted into the Fan Test from the Brake ECM: Desired Engine Fan Speed, Engine Fan Speed and Engine Speed.
With cold temperatures, no service brakes and the engine at low idle, the fan drive pump will be at minimum displacement. The fan speed and the fan drive pump pressure should be less than 3445 kPa (500 psi). At high idle, the fan drive pump pressure will also be less than 3445 kPa (500 psi).
The following procedure will be used to override the fan speed. During the test, the fan speed will be overridden at 400 rpm, 600 rpm, and 817 rpm. Note: When the engine speed is changed from low idle to high idle, the fan drive pump will produce a hydraulic pressure spike while the fan begins to rotate. The fan drive pump pressure will begin to even out.
On the Cat ET screen, select Diagnostics. Select Override Parameters.
Select "Desired Engine Cooling Fan Speed Override" and change the value


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