OPERATIONAL PERFORMANCE TEST / Excavator Test MISTRACK CHECK Summary: 1. Allow the machine to travel 20 m (65.6 ft). Measure the maximum tread deviation from the tread chord line drawn between the travel start and end points and check the performance of travel device systems (from main pump to travel motor). 2. If measured on a concrete surface, the tread deviation has a trend to decrease. Preparation: 1. Adjust the track sag of both tracks equally. 2. Provide a flat, solid test yard 20 m (65.6 ft) in length, with extra length of 3 to 5 m (9.8 to 16 ft) on both ends for machine acceleration and deceleration. Measurement: 1. Measure at both slow and fast travel speeds of the machine. 2.
Select the following switch positions: Travel Mode Switch Work Mode Slow Mode Digging Mode Fast Mode Digging Mode 3. Start traveling the machine in the acceleration zone with the travel levers at full stroke. 4. Measure the maximum distance between a straight 20 m (65.6 ft) tread chord line and the tread made by the machine. 5. After measuring the tracking in forward travel, turn the upperstructure 180 ° and measure in reverse travel. 6. Repeat the measurement three times and calculate the average values. Evaluation: Refer to the Operational Performance Standard in Group T4-2. Remedy: Refer to the Troubleshooting B in Group T5-6. Maximum Distance Acceleration Zone:
3 to 5 m 20 m T105-06-03-022 3. With the arm and bucket fully extended, hold the bucket 0.3 to 0.5 m (12 to 20 in) above the ground. 4. Maintain the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). T4-4-3 Engine Control Dial Power Mode Switch Auto-Idle Switch Fast Idle P Mode OFF Fast Idle P Mode OFF