993K Wheel Loader Electrohydraulic System Caterpillar

This test helps determine if the engine is producing the correct power output. This stall test is used in many diagnostic procedures. Low stall speeds indicate a possible problem with engine performance. The stall speed should be corrected before the performance of the hydraulic system can be properly tested.

Note: The service brakes must be applied when the tests are performed. Make sure that the service brakes and the parking brake are fully operational before you perform any tests.

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Personal injury or death can result from machine movement. When tests and adjustments are made to the transmission or the torque converter, the parking brake must be disengaged. To prevent movement of the machine and personal injury perform the procedure that follows.

1. Move the machine to a level area.

2. Engage the parking brake.

3. Shift the transmission to the NEUTRAL position.

4. Start the engine. Warm the transmission oil to a normal operating temperature of 95° ± 20°C (203° ± 36°F).

5. Place the work tool flat on the ground.
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   Illustration 1	g01446898

6. Select "Service" from the "Home Menu" on the Advisor display.
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   Illustration 2	g01446900

7. Select "Service Modes" from the "Service" menu.
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   Illustration 3	g01446899

8. Select "Implement" from the "Service Modes" menu.
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   Illustration 4	g01446897

9. Select "Stall Checks" from the "Implement" menu.
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   Illustration 5	g01446896

10. Select "Raise Dbl Stall Spd" from the "Stall Checks" menu.

11. Follow the steps that are displayed on the screen in order to complete the test.
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    NOTICE
    To ensure that the transmission oil does not overheat do not keep the torque converter in the stall condition for more than 30 seconds. After the torque converter stall test allow the transmission oil to cool before stopping the engine.

12. After the test is completed, allow the engine coolant and the transmission oil to cool. Stop the engine.

The stall speed should be 1446 ± 50 rpm.