hitachi — PIPING JOINT

GENERAL / Tightening Torque O-ring Seal Joint O-ring (6) seats against the end face of adapter (7) to seal pressure oil. IMPORTANT: 1. Be sue to replace O-ring (6) with a new one when reconnecting. 2. Before tightening nut (9), confirm that O-ring (6) is seated correctly in O-ring groove (e). Tightening nut (9) with O-ring (6) displaced will damage O-ring (6), resulting in oil leakage. 3. Take care not to damage O-ring groove (e) or sealing surface (10). Damage to O-ring (6) will cause oil leakage. 4. If nut (9) is loose and oil is leaking, do not re-tighten nut (9). Replace O-ring (6) with a new one and check that O-ring (6) is correctly seated in place, tighten nut (9).

7 6 9 Hose Fittings M104-07-033 Wrench Size mm Wrench Size mm Tightening Torque 8 1 Union Nut Joint Body N m (kgf m, lbf ft) 19 17 29.5 (3.0, 21.5) 22 19 69 (7.0, 51) 27 22 93 (9.5, 69) 32 27 137 (14.0, 101) 36 30, 32 175 (18.0, 129) 41 36 205 (21.0, 151) 46 41 205 (21.0, 151) W1-2-6