ASSEMBLING Bolt Tightening Torque Specifications Bolt Location (lbf•ft) Counterweight mounting bolt (2025) Counterweight lock plate securing bolt (506) Pin lock securing bolt (290) Hose connecting bolt (130) Precautions for Tightening Bolts Use a torque wrench to tighten bolts to specifications. After tightening bolts to specification, mark the tightened bolt head to ensure that all the bolts have been tightened. Be sure to use Hitachi original bolts. If the bolt length is too long or short, the bolt will not be tightened correctly, pos- sibly inducing an accident 6-2 Bolt Size N•m (kgf•m) M45 2800 (280) M24 700 (70) M20 400 (40) M14 180 (18)