NIPPLE 4F0440 - Caterpillar

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.
Move the machine to a level area.
Engage the parking brake.
Shift the transmission to the NEUTRAL position.
Start the engine. Warm the transmission oil to a normal operating temperature of 95° 20°C (203° 36°F).
Place the work tool flat on the ground.
Connect Cat® Electronic Technician (Cat® ET) data cable to the data port.
Follow the steps that are displayed on the Cat® ET screen to complete the test.
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.
After the test is completed, allow the engine coolant and the transmission oil to cool. Stop the engine.The torque converter stall speed for 986K should be 1850 10 rpm.If the torque converter stall speed is above the specified range, the engine power output could be too high. The torque converter could also have excess slippage.If the torque converter stall speed is below the specified range, the engine may not be developing full power. There may also be an excessive parasitic load on the engine.