How To Use; Operational Cautions - Hitachi WH 14 Instruction Manual

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HOW TO USE

1. Operation of switch (Fig.4)
The switch in this machine functions as a
motor switch and rotational direction
selector switch. When the switch is set to R
indicated on the handle cover, the motor
rotates clockwise to tighten the bolt. When
the switch is set to L, the motor rotates
counterclockwise to loosen the bolt. When
the switch is released, the motor stops.
CAUTION:
Be sure to turn the switch OFF and wait
until the motor completely stops before
changing the direction of wrench
revolution. Switching while the motor is
rotating will result in burning the motor.
2. Tightening and loosening bolts
A hex. socket matching the bolt or nut must first be selected. Then mount the socket on
the anvil, and grip the nut to be tightened with the hex. socket. Holding the wrench in line
with the bolt, press the power switch to impact the nut for several seconds. If the nut is
only loosely fitted to the bolt, the bolt may turn with the nut, therefore preventing proper
tightening. In this case, stop impact on the nut and hold the bolt head with a wrench
before restarting impact, or manually tighten the bolt and nut to prevent them slipping.

OPERATIONAL CAUTIONS

1. Confirm the line voltage (Figs.5, 6, 7,
8 and 9)
The available tightening torque is
influenced by line voltage. Reduced line
voltage lowers the available tightening
torque.
For example, if you use a 115 V type wrench
on a 105 V line the available tightening
torque will be reduced to 70 to 90%. When
extending the power cord, use an extension
cord which is as short as possible. When
the line voltage is low and a long extension
cord is needed a step up transfomer should
be used. The relation between the line
voltage and the tightening torque are
shown in the figures.
14
Switch
R
Fig. 4
(WH14)M16
30
(kg-m)
20
10
0
0 2 4
Tightening time
Fig. 5
55 (F10T)
Rating
115V
105V
(s)
6 8 10