Testing the Flow Rate of the Gear Pump (Cooling Fan)
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Do not operate or work on this work tool unless you have read and understand the instructions and warnings in the Operation And Maintenance Manual for both the work tool and the host machine. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility. |
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Introduction
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| Illustration 1 | g00977619 |
The flow test for the gear pump (cooling fan) will measure the volume that is moved by the pump. The hydraulic flow rate will help to determine if the pump is operating within the intended parameters. If the pump output is less than normal, the performance of the cooling fan will be affected.
Required Tools
Hydraulic test procedures may be performed using either one of the following test equipment:
- Caterpillar DataView
- Standard Flow meter
Caterpillar DataView Tool
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| Illustration 2 | g00920192 |
Caterpillar DataView Caterpillar DataView is a PC based diagnostic tool. The Caterpillar DataView accepts a maximum of nine standard Caterpillar sensors for measurements on the machine. The signal is transmitted to a personal computer and the information is displayed. | |
The following table provides a list of the required tools if Caterpillar DataView is used in order to perform the following test procedure. Caterpillar DataView is not shown in the following test procedure.
| Required Tools | |
| Part Number and Description | Quantity |
| 131-5051 DataView Tool Gp | 1 |
| 4C-9436 Pressure Sensor | 1 |
| 131-5056 Auto ID Cable | 1 |
Standard Tools
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| Illustration 3 | g00944801 |
Flow meter and Hose | |
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| Illustration 4 | g00944838 |
Cap and Plug | |
The following table provides a list of the required tools if traditional hand held tools are used in order to perform the following test procedure. These tools will be used in order to perform the following test procedure. The flow meter may vary in volume. There are two of the various flow meters that are listed below. The 8T-0454 Flow Meter Gp will be used for the following test.
| Required Tools | |||
| Tooling | Item | Part Number and Description | Quantity |
| A | A1 | 8T-0454 Flow Meter Gp 0 to 190 L/min (0 to 50 US gpm) |
1 |
| B | B1 | 122-6891 Hydraulic Hose | 1 |
| C | C1 | 6V-9512 Face Seal Plug | 1 |
| D | D1 | 6V-9832 Cap As | 1 |
Test Procedure
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Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system. |
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Perform the following procedure before you perform the test procedure that follows:
- Park the machine on a level area that is clear from all equipment and material.
- Verify that the service brake system and the parking brake system are in good working order.
- Block the drive wheels in both directions.
- Apply the parking brake.
- Ensure that the propel lever is in the NEUTRAL position. Ensure that the parking brake is in the ON position.
- Locate the gear motor (cooling fan) on the right side of the machine.
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| Illustration 5 | g00944963 |
Note: This test will access the supply line from the pump at the location of the gear motor.
- Disconnect supply line (2) from gear motor (1). The supply line provides hydraulic flow to the cooling fan motor.
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| Illustration 6 | g00944953 |
- Use 6V-9512 Face Seal Plug (C1) and 6V-9832 Cap As (D1) in order to cap gear motor (1) and plug supply line (2) temporarily.
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| Illustration 7 | g00944838 |
Cap and Plug | |
Note: The cap and the plug are used in order to reduce leakage during this test. If the flow meter is readily available, these additional parts may not be needed for the test.
- Install 8T-0454 Flow Meter Gp (A1). Attach 122-6891 Hydraulic Hose (B1) to the end of the flow meter. Attach the other end of 122-6891 Hydraulic Hose (B1) to the port for supply line (2) on gear motor (1). Attach supply line (2) to the other end of the flow meter. Ensure that all of the connections are secure. Secure the flow meter to the machine.
- Start the engine. Run the engine at high idle.
- Locate fan control valve (3). Loosen EDC coil (4) and remove EDC coil (4) from fan control valve (3). This will allow the fan control valve to open fully.
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| Illustration 8 | g00950645 |
- The flow meter should have a reading of 62 ± 4 L/min (16.3 ± 1 US gpm). If the readings are not within these limits, refer to the troubleshooting section for a possible solution.
- Stop the engine.
- Disconnect the tooling. Secure EDC coil (4) to fan control valve (3). Secure supply line (2) to cooling gear motor (1). Ensure that all of the connections are secure.