VALVE GP-CONTROL 3192158 - Caterpillar

Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
The service brakes must be applied when tests are performed. Make sure that the service brakes are fully operational before you perform any tests. Make sure that the transmission oil is at the normal operating temperature when tests are performed.
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.Note: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.
Move the STIC transmission direction control switch to the NEUTRAL position.
Lower the work tool to the ground.
Engage the parking brake.
Place blocks in front of the wheels and behind the wheels.
Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear sight of the operator.
Apply the service brakes and start the engine.Note: To ensure that the transmission oil does not overheat, do not keep the torque converter in a full stall condition for more than 30 seconds.
Place the transmission in THIRD SPEED.
Disengage the parking brake.
Move the STIC transmission direction control switch to the FORWARD position.
Increase the engine speed to high idle.
Allow the engine rpm to stabilize. Then, observe the engine speed with the Vital Information Management System (VIMS).Reference: For additional information on observing the engine speed with the Vital Information Management System (VIMS), refer to the Operation and Maintenance Manual, SEBU7145, "994D Wheel Loader", "Parameters (VIMS Monitoring System)".
The correct stall speed is 1545 65 rpm.
After the torque converter is stalled, move the STIC transmission direction control switch to the NEUTRAL position. Operate the engine at 900 rpm to 1200 rpm in order to cool the oil.Stall speeds that are low indicate either incorrect engine performance or incorrect torque converter performance. Stall speeds that are high indicate incorrect transmission performance or incorrect performance of the torque converter. If you must repeat the test, keep the transmission in neutral and wait for two minutes between tests.Reference: For additional information about the Vital Information Management System (VIMS), refer to the Service Manual, SENR6059, "Vital Information Management System (VIMS)".Reference: For additional information about troubleshooting the transmission and the torque converter, refer to the Service Manual module Testing and Adjusting, RENR2506, " 994D Wheel Loader Power Train".