3) TRAVEL SPEED (1) Measure the time required for the excavator to travel a 20 m test track. (2) Preparation ① Adjust the tension of both tracks to be equal. Prepare a flat and solid test track 20 m in length, with extra length of 3 to 5 m on both ends for machine acceleration and deceleration. Hold the bucket 0.3 to 0.5 m above the ground with the arm and bucket rolled in. Keep the hydraulic oil temperature at 50 ± 5 C . ② 0.3~0.5m ③ ④ 290LC7MS01 (3) Measurement ① Measure both the low and high speeds of the machine. Before starting either the low or high speed tests, adjust the travel mode switch to the speed to be tested, then select the following switch positions. Mode selector :
M mode Start traveling the machine in the acceleration zone with the travel levers at full stroke. Measure the time required to travel 20m. After measuring the forward travel speed, turn the upperstructure 180 and measure the reverse travel speed. Repeat steps ④ and ⑤ three times in each direction and calculate the average values. ② · ③ 3 ~ 5m 20m 3 ~ 5m ④ ⑤ 290LC7MS02 ⑥ The average measured time should meet the following specifications. (4) Evaluation Unit : Seconds / 20 m 7-5 Model Travel speed Standard Max imum allowable Remarks R800LC-7A 1 Speed 27.7±2.0 34.6 2 Speed 18±1.0 22.5