OPERATIONAL PERFORMANCE TEST / Component Test Measurement: 1. Select the following switch positions: Engine Control Dial Work Mode Fast Idle Digging Mode 2. Slowly operate the bucket, arm or boom control levers to the stroke ends and relieve each func- tion. 3. Read pressures on the pressure gauge at this time. 4. Perform the measurement for the bucket, arm and boom in that order. 5. Repeat the measurement three times and calcu- late the average value for each. Evaluation: 1. Performance of the overload relief valves are normal if the measured main relief pressures are within the specified value range. Refer to the Performance Standard in Group T4-2.
T157-05-04-005 T4-5-16 Power Mode Switch Auto-Idle Switch P Mode OFF