Unit : Degree 7-9 7)SWING FUNCTION DRIFT CHECK (1)Measure the swing drift on the bearing outer circumference when stopping after a 360。 full speed swing. (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. ④Make two chalk marks: one on the swing bearing and one directly below it on the track frame. ⑤Swing the upperstructure 360˚. ⑥Keep the hydraulic oil temperature at 50±5˚C.
(3) Measurement ①Conduct this test in the P mode. ②Select the following switch positions. ·Power mode switch : P mode ③Operate the swing control lever fully and return it to the neutral position when the mark on the upperstructure aligns with that on track frame after swinging 360˚. ④Measure the distance between the two marks. ⑤Align the marks again, swing 360˚, then test the opposite direction. ⑥Repeat steps ④ and ⑤ three times each and calculate the average values. (4)Evaluation Drift angle 360 swing Swing start & stop The measured drift angle should be within the following specifications. Model Power mode switch Standard Maximum allowable Remarks R505LVS P mode 90 below 112.5