Suggestions And Precautions For The Efficient Use Of The Charger; Other Precautions - Hitachi WH 12DAF2 Technical Data And Service Manual

8-4. Suggestions and Precautions for the Efficient Use of the Charger

(1) Batteries may not be rechargeable immediately after use
If the storage batteries are exposed to direct sunshine for an extended period, or if the temperature of the
battery is 40 ûC (104 ûF) or higher immediately after they have been used in the tool, the pilot lamp may not
light up when the batteries are connected to the Model UC 14YFA or UC 18YG charger. This is because the
built-in thermostat functions to stop the charging when the temperature of the storage batteries reach 40ûC
(104 ûF) or more. In such a case, the customer should be advised to place the batteries in a shaded area with
a good airflow, and allow sufficient cooling before recharging. This phenomenon is common to all existing
batteries which employ temperature sensitive overcharge devices. The cooling time required before charging
can be accomplished varies from a few minutes to about 30 minutes, depending on the load, duration of use,
and ambient temperature.

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
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.
--- 20 ---