OPERATIONAL PERFORMANCE TEST / Component Test Measurement: 1. Select the following switch positions: Engine Control Dial Work Mode Fast Idle Digging Mode 2. First, slowly operate the bucket, arm and boom control levers to the stroke end and relieve each function. 3. As for the swing function, secure the upperstruc- ture so it is immovable. Slowly operate the swing lever and relieve the swing function. 4. As for the travel function, secure the tracks against an immovable object. Slowly operate the travel levers and relieve the travel function. 5.
With the power digging switch pushed, slowly op- erate the bucket, arm and boom control levers to the stroke ends and relieve each function within eight seconds. Evaluation: Refer to the Performance Standard in Group T4-2. NOTE: If the measure pressures for all functions are lower than the specified range, the probable cause is a decrease of main relief valve setting pressure. If relief pressure of a particular function is lower, the probable cause is other than main relief valve. T4-5-10 Power Mode Switch Auto-Idle Switch P Mode OFF