349E Excavator Hydraulic System Operational Checks Caterpillar

The operational checks can be used to find leakage in the system and components that are not functioning correctly. The speed of rod movement or the torque on a motor can be used to check the condition of the cylinders, motors, and the pumps.

Perform the following operational checks in order to troubleshoot problems concerning the hydraulic circuits and components on the machine.

The following operational checks should be performed under the following conditions:

• Engine Speed Dial "10"

• AEC switch OFF

• High Power (HP) Mode or Standard Power (STD) Mode

Note: Due to country-specific fuel consumption criteria, your machine may not be equipped with all of the power mode settings.

Note: The following operational checks should be performed with the hydraulic oil temperature at 55° ± 5°C (131° ± 9°F)

• Testing and Adjusting, "Engine Performance - Test (Engine Speed)"

• Testing and Adjusting, "Travel on Level Ground - Test"

• Testing and Adjusting, "Travel on Level Ground - Test (Optional Test)"

• Testing and Adjusting, "Automatic Travel Speed Control - Test"

• Testing and Adjusting, "Machine Drift on a Slope - Check"

• Testing and Adjusting, "Swing Speed and Overswing on Level Ground - Check"

• Testing and Adjusting, "Swing Speed and Swing Drift on a Slope - Check"

• Testing and Adjusting, "Cylinder Drift - Check (Empty Bucket)"

• Testing and Adjusting, "Cylinder Drift - Check (Loaded Bucket)"

• Testing and Adjusting, "Cylinder Speed - Check"

The specifications that are listed in tables for the operational checks are calculated average values. The values will vary due to the configuration of the machine and engine speed. Table 1 contains the machine configurations that were used in order to obtain these specifications.

Reference: Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for the specifications for engine speed.