RETAINER 1062048 - Caterpillar

Before you perform these procedures, refer to the Service Manual module Troubleshooting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.The following operational checks can be used for the following items:
find leakage in the system.
determine whether the pilot operated hydraulic controls are functioning correctly.
determine whether the pumps or motors are functioning correctly.
determine whether the whole work tool system is functioning correctly.In order for the hydraulic system to function properly, each component in the system must be set to the correct specifications. Some components must be set prior to the testing of other components. A component that is not set properly will have an impact on other components in the system.Note: The oil in the hydraulic system must be between 54 °C (130 °F) and 82 °C (180 °F). In order to increase the oil temperature, start the engine and operate all the cylinders for at least five cycles.Implement Cycle Times
Prepare the machine for troubleshooting. Refer to the Service Manual module Troubleshooting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.Lift Cylinder
Ensure that the transmission direction and speed control is in the NEUTRAL position. Start the engine and run the engine at high idle.
Operate the lift cylinder through at least five lift cycles. This will ensure that there is warm oil in the lift cylinders.
Position the work tool so that the bottom of the bucket is flat on the ground. Ensure that the engine is at high idle. Maintain high idle for the duration of the test.
Raise the work tool from the full LOWER position. Record the time from the full LOWER position to the full RAISE position.
Tilt the work tool to the full TILT BACK position.
Lower the bucket from the full RAISE position. Record the time from the full RAISE position to the full LOWER position.
Raise the work tool to the full RAISE position. Move the pilot valve to the FLOAT position. Record the time from the full RAISE position to the full LOWER position.
Table 1
CYCLE TIME FOR THE LIFT CYLINDERS WITH RATED LOAD
938H WHEEL LOADER    
Machine Function     Cycle Time    
Raise     6.1 0.4 seconds    
Power Down     3.8 0.5 seconds    
Float     2.1 0.5 seconds    
Table 2
CYCLE TIME FOR THE LIFT CYLINDERS WITH RATED LOAD
IT38H INTEGRATED TOOLCARRIER    
Machine Function     Cycle Time    
Raise     6.1 0.4 seconds    
Power Down     3.2 0.5 seconds    
Float     2.8 0.5 seconds    If the speeds are not correct, refer to the Testing and Adjusting, "Hydraulic System Troubleshooting".Tilt Cylinder
Ensure that the transmission direction and speed control is in the NEUTRAL position.
Start the engine and run the engine at high idle.
Operate the tilt cylinders through at least five cycles. This will ensure that there is warm oil in the tilt cylinders.
Tilt the work tool to the full TILT BACK position. Raise the work tool to the full RAISE position.
Tilt the work tool from the full TILT BACK position to the