Unit : Seconds / 3 revolutions 7-8 6)SWING SPEED (1)Measure the time required to swing three complete turns. (2)Preparation ①Check the lubrication of the swing gear and swing bearing. ②Place the machine on flat, solid ground with ample space for swinging. Do not conduct this test on slopes. ③With the arm rolled out and bucket rolled in, hold the bucket so that the height of the bucket pin is the same as the boom foot pin. The bucket must be empty. ④Keep the hydraulic oil temperature at 50±5˚C. (3)Measurement ①Select the following switch positions. ·Power mode switch : P mode ②Operate swing control lever fully. ③Swing 1 turn and measure time taken to swing next 3 revolutions.
④Repeat steps ② and ③ three time and calculate the average values. (4)Evaluation The time required for 3 swings should mee t the following specifications. Model Power mode switch Standard R505LVS P mode 19.8±1.5