hitachi — DISASSEMBLE SWING MOTOR

UPPERSTRUCTURE / Swing Device 9. Hoist and set casing (1) horizontally. Remove rotor (9), retainer (8), plate (7) and plungers (6) (9 used) from shaft (4). 10. Remove plates (10) (4 used) and friction plates (11) (3 used) from casing (1). 11. Remove shoe plate (5) from casing (1). 12. Remove shaft (4) from casing (1) by using a plastic hammer. 13. Remove oil seal (2) from casing (1) by using a bar and hammer. 14. Remove the outer race of bearing (3) from casing (1) by using a bar and hammer. 15. Remove the inner race of roller bearing (3) from shaft (4) by using a press. IMPORTANT: The filter and orifice are installed to piston (13).

Do not disassemble piston (13) unless they are clogged or deformed. When replacing the inner parts, replace them as an assembly. 16. Remove piston (13) from casing (1) by using a pair of pliers. 17. Remove spring (14) and ball (15) from casing (1). W2-6-27