Unit : mm / 20 m 7-7 5)TRAVEL DEVIATION (1)Measure the deviation by the tracks from a 20m straight line. (2)Preparation ①Adjust the tension of both tracks to be equal. ②Provide a flat, solid test yard 20 m in length, with extra length of 3 to 5 m on both ends for machine acceleration and deceleration. ③Hold the bucket 0.3 to 0.5 m above the ground with the arm and bucket rolled in. ④Keep the hydraulic oil temperature at 50±5˚C. (3)Measurement ①Measure the amount of mistracking at high and low travel speeds. ②Before beginning each test, select the following switch positions. ·Power mode switch :
P mode ③Start traveling the machine in the acceleration zone with the travel levers at full stroke. ④Measure the distance between a straight 20m line and the track made by the machine. (dimension a) ⑤After measuring the tracking in forward travel, turn the upperstructure 180。 and measure that in reverse travel. ⑥Repeat steps ④ and ⑤ three times and calculate the average values. (4)Evaluation 0.3~0.5m 3~5 m extra length a 20M 3~5 m extra length 0.3~0.5m Mistrack should be within the following spe cifications. Model Standard Maximum allowable Remarks R505LVS 200 below 600