The “machine system” refers to the arrangement of valves and hydraulic lines on the excavator. The systems that are covered by this manual are described…

This procedure is used to enter the service mode of the operator monitor. Illustration 1 g00991623 Illustration 1 is the default screen of the monitor.…

Table 1 Tool Control System Identification Chart for 320C to 330C     Tool Control System     Number of Control Valves     Slide…

This calibration is used to memorize the power shift pressure for the proportional reducing valve. Be sure to perform this calibration when the proportional reducing…

This function allows the current to the proportional reducing valve to change at a specific rate. This function is used to confirm the activation of…

Illustration 1 g01009662 “Check For Over Current Of Proportional Reducing Valve” Illustration 2 g01009713 Illustration 3 g01009710 “Check For +B Short Of Proportional Reducing Valve”…

Two preliminary temporary adjustment procedures must be performed: A temporary setting of the main relief valve pressure is required. A temporary line relief setting of…

A visual inspection of the system is the first step in order to troubleshoot a problem. Shut off the engine and lower all implements to…

Hydraulic oil pressure can remain in the hydraulic systems after the engine and pump have been stopped. Serious injury can be caused if this pressure…

Solenoid Valves (One-Way Flow) Illustration 1 g00777012 Solenoid valves for one-way flow (electronic check valves) There are two one-way solenoid valves. Both solenoids receive power…