hitachi — ASSEMBLE SWING MOTOR

UPPERSTRUCTURE / Swing Device IMPORTANT: Tap the bearing type indicated surface by using a plastic hammer and install bearing (19). 12. Install the outer race of bearing (19) into valve casing (25) by using a bar and plastic hammer. 13. Install O-ring (20) to valve casing (25). Apply grease to valve plate (18) in order not to fall off. Install valve plate (18) to value casing (25). 14. Align the matching mark on casing (3) and install valve casing (25) with socket bolts (26) (4 used). : 430 N m (44 kgf m, 320 lbf ft) 15. Install poppets (24) (2 used) and springs (23) ( 2 used) to valve casing (25). Install plugs (21) (2 used) attached with O-rings (22) (2 used) to valve casing (25). :

17 mm : 539 N m (55 kgf m, 400 lbf ft) 16. Install relief valves (29) (2 used) to valve casing (25). : 17 mm : 177 N m (18 kgf m, 130 lbf ft) 17. Install swing parking brake switch valve (2) to casing (3) with socket bolts (1) (3 used). : 41 mm : 5 mm : 12 N m (1.2 kgf m, 8.7 lbf ft) W2-6-27