Unit : mm 7-10 8)SWING BEARING PLAY (1)Measure the swing bearing play using a dial gauge to check the wear of bearing races and balls. (2)Preparation ①Check swing bearing mounting cap screws for loosening. ②Check the lubrication of the swing bearing. Confirm that bearing rotation is smooth and without noise. ③Install a dial gauge on the track frame as shown, using a magnetic base. ④Position the upperstructure so that the boom aligns with the tracks facing towards the front idlers. ⑤Position the dial gauge so that its needle point comes into contact with the bottom face of the bearing outer race. ⑥Bucket should be empty.
(3)Measurement ①With the arm rolled out and bucket rolled in, hold the bottom face of the bucket to the same height of the boom foot pin. Record the dial gauge reading (h1). ②Lower the bucket to the ground and use it to raise the front idler 50cm. Record the dial gauge reading (h2). ③Calculate bearing play(H) from this data (h1 and h2) as follows. H=h2-h1 (4)Evaluation Measurement : (h1) Measurement : (h2) Measurement : (h1) Measurement : (h2) The measured drift should be within the fol lowing specifications. Model Standard Maximum allowab le Remarks R505LVS 0.5~1.5 5