PLATE 2486415 - Caterpillar

Machine Preparation
Move the machine to a smooth horizontal location. Move away from working machines and personnel. Lower the work tool and/or attachments to the ground.
Allow only one operator on the machine. Keep all personnel away from the machine or in the view of the operator.
Engage the parking brake.Performance Test
Stall Test
The amount of oil flow that is produced by a pump will increase with the speed of the pump. First, verify that the pump is operating at the rated speed in order to test the performance of a pump. Perform the torque converter stall test in order to verify that a pump is operating at rated speed.
Shift the transmission to the NEUTRAL position.
Start the engine. Warm the transmission oil to normal operating temperature of approximately 75 °C (167.0 °F).
Lower the work tool and/or attachments to the ground.
Fully depress the right side service brake pedal. Hold the brake pedal in the depressed position for the duration of the test.
Release the parking brake.
To make sure that the transmission oil does not overheat, do not keep the torque converter in a stall condition for more than 30 seconds. After the torque converter stall test, reduce engine speed to low idle, move the transmission control to neutral and increase the engine speed to approximately 1500 rpm to cool the oil.
Place the transmission in FOURTH SPEED.
Move the transmission direction control to the FORWARD position.
Increase the engine speed to high idle.
Allow the engine speed to stabilize. Record the engine rpm.
Reduce the engine speed to low idle.
Shift the transmission to the NEUTRAL position.The correct stall speed in fourth speed forward is 2278 62 rpm.Low stall speeds indicate a possible problem with engine performance . The stall speed should be corrected before the performance of the implement pump can be properly tested.Implement Cycle Time
The speed of the implements is affected by the amount of oil flow that is produced by the implement pump. Check the implement cycle times in order to determine if there may be a problem with the implement pump.ReferenceRefer to the Service Manual module Troubleshooting, KENR7621, "Operational Checks (Hydraulic System)" for the test for the implement cycle times.ReferenceRefer to the Service Manual module Troubleshooting, KENR7621 for information on troubleshooting the hydraulic system.