UPPERSTRUCTURE / Pump Device W2-4-71 Item Part Name Q’ty Wrench Size (mm) Tightening Torque Remarks N⋅m (kgf⋅m) (Ibf⋅ft) 1 Housing 1 2 Flange 1 3 Oil Seal 1 Apply grease to the oil seal lip when installing 5 Retaining Ring 1 6 Seal 2 Apply grease to seal when installing 7 Cover 1 9 Backup Ring 2 Apply grease to backup ring when installing 10 Key 2 12 O-Ring 2 Apply grease to O-ring when installing 13 Gear 1 14 Gear 1 15 Washer 2 16 Bolt 2 : 17 39 to 44 (4 to 4.5) (29 to 33) 26 Bushing 4 Apply a film of hydraulic oil to bushing when installing 27 Bushing 4 Apply a film of hydraulic oil to bushing when installing