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4. Precautions for tightening Bolts
Tighten bolts with the specified torque by using a torque
wrench.
After tightening the bolts with specified torque, mark the
bolts to prevent miss tightening.
Use Hitachi genuine bolts.
If the bolt length is too long or too short, it can not be
tightened properly, causing serious accident.
Refer to the Maintenance section for bolt tightening
torque.
5. Worker's Clothing
(1) Wear protective clothing for the work.
(2) Wear goggles or safety glasses, and safety equipment
appropriate to the job.
6. Confirm Work Sequence
Explain work sequence, roll of each person and
precautions thoroughly to all people involved to ensure
safety.
7. Determine signs, signal person and commander.
Allocate only one signal person for work. Multiple signal
persons will confuse workers, causing accident.
DISASSEMBLING • ASSEMBLING
4-2
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