GENERAL / Tightening PIPING JOINT IMPORTANT: The torques given in the chart are for general use only. Do not use these torques if a differ- ent torque is given for a specific ap- plication. Union Joint Metal sealing surfaces (4) and (5) of adapter (1) and hose (2) fit together to seal pressure oil. Union joints are used to join small-diameter lines. IMPORTANT: 1. Do not over-tighten union nut (3). Excessive force will be applied to metal sealing surfaces (4) and (5), possibly cracking adapter (1). Be sure to tighten union nut (3) to specifications. 2. Scratches or other damage to sealing surfaces (4) or (5) will cause oil leakage at the joint.
Take care not to damage them when connecting/disconnecting. Joint Body 37 ° 30 ° Female Union Joint Male Union Joint W105-01-01-017 to tightening torque of 37 ° female. W1-2-6 1 4 3 5 2 M202-07-0 Description Wrench Size mm Wrench Size mm Tightening Torque Union Nut Joint Body N⋅m (kgf⋅m, lbf⋅ft) 30°male 17 19 22 27 32 36 41 17 19 22 27 32 36 41 24.5 (2.5,18) 29.5 (3.0, 21.5) 39 (4.0, 28.5) 78 (8.0, 58) 137 (14.0,101) 175 (18.0,129) 205 (21.0,151) 37°female 17 19 22 27 32 36 41 14 17 19 22 27 32 36 24.5 (2.5,18) 29.5 (3.0, 21.5) 39 (4.0, 28.5) 78 (8.0, 58) 137 (14.0,101) 175 (18.0,129) 205 (21.0,151) NOTE: Tightening torque of 37° male coupling without union is similar