MAINTENANCE PROCEDURE MAINTENANCE (4) First boom foot pin (2 points) (5) First boom cylinder foot pin (1 point) (6) First boom cylinder rod end pin (1 point) (7) First boom-Second boom coupling pin (1 point) (8) Offset cylinder foot pin (1 point) (9) Offset cylinder rod end pin (1 point) (10) Sub-link coupling pin (2 points) (11) Second boom-Third bracket coupling pin (2 points) (12) Arm cylinder foot pin (2 places) (13) Arm cylinder rod end pin (1 place) (14) Third bracket-Arm coupling pin (1 place) (15) Bucket cylinder foot pin (1 place) (16) Bucket cylinder rod end pin (1 place) (17) Arm-Link coupling pin (1 place) (18) Link coupling pin (1 place) (19) Bucket-Link coupling pin (1 place) (20) Arm-Bucket coupling pin (1 place) 4-54