Other Precautions - Hitachi WH 12DH Technical Data And Service Manual

9. OTHER PRECAUTIONS

(1) Check for cracks or other damage on the socket
Cracks or any other faults on the socket are very hazardous. In addition, cracks or other damage to
accessories will cause loss of tightening torque efficiency. Advise the customer to inspect accessories often,
and ensure there are no abnormalities.
(2) Socket dimensions
Without fail, utilize an appropriate socket which matches the bolt and/or nut dimensions. If the socket
dimensions are larger than the bolts or nuts, it will not only cause insufficient tightening torque, but could also
easily cause damage to the socket. Please refer to the tables in Para. 6-2 for appropriate socket dimensions.
(3) Hammering section lubrication
Grease (ATTOLUB MS No. 2) is utilized in the hammering section. Frequent or continuous use of the tool will
cause excessive temperature rise of the hammering section, resulting in depletion of the grease and
subsequent increased wear of components which will, in turn, cause loss of tightening efficiency. Accordingly,
it is necessary to periodically replenish the grease in the hammering section to ensure proper lubrication of
moving and sliding components.
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