OPERATIONAL PERFORMANCE TEST / Excavator Test COMBINED OPERATION OF BOOM RAISE / ARM ROLL-IN FUNCTION CHECK Summary: 1. Check boom raise and arm roll-in movement and speeds while operating both functions simultaneously. 2. Check if the cylinders do not hesitate while oper- ating the cylinder with the engine running at fast idle. Preparation: 1. Retract the arm cylinder fully and extend the bucket cylinder so that the bucket teeth and arm mounting pin are on a straight line. Adjust the boom cylinder so that the bucket tooth tip height is 0.5 m (1 ft 8 in) above the ground. (The bucket must be empty.) 2. Maintain the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). Measurement: 1.
Select the switch positions as follows. Arm Mounting Pin 0.5 m T107-06-03-006 2. Raise the boom and roll the arm in full stroke at the same time. 3. Measure the time required for the arm to reach the stroke end. (The bucket must be empty.) 4. Repeat the measurement three times and calcu- late the average value. Evaluation: Refer to T4-2 Operational Performance Standard in Group T4-2. Remedy: Refer to Troubleshooting B in Group T5-6. T1V1-04-04-001 T4-4-24 Engine Control Dial Power Mode Switch Auto-Idle Switch Work Mode Fast Idle P Mode OFF Digging Mode