Suggestions And Precautions For The Efficient Use Of The Charger And Storage Batteries; Other Precautions - Hitachi WH 12DAF Technical Data And Service Manual

7-4. Suggestions and Precautions for the Efficient Use of the Charger and Storage Batteries

(1) Batteries may not be rechargeable immediately after use
If any of the storage batteries Types EB 1212S, EB 1214L, EB 1220BL and EB 1222HL is exposed to direct
sunlight for an extended period or if the temperature of the battery is high immediately after it has been used
in the tool, the battery may not be chargeable when the battery is connected to the charger. Chargeable
temperature ranges of each type of battery are specified as follows.
Types EB 1212S, EB 1214L and EB 1220BL: from -5˚C to 60˚C (from 23˚F to 140˚F)
Type EB 1222HL: from 0˚C to 45˚C (from 32˚F to 113˚F)
In such a case, the customer should be advised to place the battery in a shaded area with a good airflow, and
allow sufficient cooling before recharging. This phenomenon is common to all existing batteries that employ a
thermostat. The cooling time required before charging varies from a few minutes to about 30 minutes,
depending on the load, duration of use, and ambient temperature.

8. 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. 5-2 for appropriate socket dimensions.
(3) Hammering section lubrication
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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