Maintenance And Inspection - Hitachi W 6VM Handling Instructions Manual

Sub-Stopper (G)
Bit
3. Dismounting the bit (Fig. 8)
Remove the sub-stopper (F) as the same manner of
hex-head socket and remove the bit holder, then pull
out the bit with pliers.
Bit
Bit holder
4. Mounting the hex-socket or the bit
Install the bit in the reverse order to removal.
HOW TO USE THE SCREW DRIVER
1. Switch operation and rotational speed adjustment
Bit rotational speed can be adjusted between 0 –
6000/min (W6VM) or 0 – 4500/min (W6V4) or 0 –
3000/min (W6VA4) or 0 – 2600/min (W6VB3) or 0 –
1700/min (W8VB2) varying the degree by which the
trigger switch is pulled. Rotational speed increases as
the trigger switch is pulled, and reaches a maximum
speed of 6000/min (W6VM) or 4500/min (W6V4) or
3000/min (W6VA4) or 2600/min (W6VB3) or 1700/min
(W8VB2) when the trigger switch is pulled fully.
To facilitate continuous operation, pull the trigger switch
and depress the switch stopper. The switch will then
remain ON even when the fi nger is released. By pulling
the trigger switch again, the switch stopper disengages
and the switch is turned OFF when the trigger switch is
released.
2. Screw Driver operation
When the switch is turned ON, the motor starts to run
but the hex-socket (or the bit) does not rotate. Attach
the hex-socket to the screw head groove, and push the
Screw Driver against the screw. The hex-socket then
rotates and tightens the screw.
CAUTION
Ensure that the Screw Driver is held truly perpendicular
to the head of the screw.
If held at an angle, the driving force will not be fully
transferred to the screw, and the screw head and/or
hex-socket will be damaged. Hex-socket rotation stops
when pushing force is released.
Bit holder
(Short type)
Fig. 7
Sub-Stopper (F)
Fig. 8
3. Direction of hex-socket rotation
The hex-socket rotates clockwise (viewed from the
rear side) when the reversing switch lever is set to the
"R" side position. When the lever is set to the "L" side
position, the hex-socket rotates counter-clockwise, and
can be used to loosen and remove screws.
CAUTION
Never change the direction of hex-socket (or bit holder)
rotation while the motor is running. To do so would
seriously damage the motor. Turn the power switch
OFF before changing the direction of hex-socket (or bit
holder) rotation.

MAINTENANCE AND INSPECTION

1. Inspecting the hex-socket (or bit)
Since continued use of a worn hex-socket (bit) will
damage screw heads, replace the hexsocket (bit) with
a new one as soon as excessive wear is noticed.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do so
could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very "heart" of the power
tool. Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes
For your continued safety and electrical shock
protection, carbon brush inspection and replacement
on this tool should ONLY be performed by a Hitachi
Authorized Service Center.
5. Replacing supply cord
If the supply cord of Tool is damaged, the Tool must be
returned to Hitachi Authorized Service Center for the
cord to be replaced.
6. Service and repairs
All quality power tools will eventually require servicing
or replacement of parts because of wear from normal
use. To assure that only authorized replacement parts
will be used, all service and repairs must be performed
by a Hitachi Authorized Service Center, ONLY.
CAUTION
○ Be sure to follow the above assembly procedures
exactly. Should be internal wiring contact the armature
or become pinched between the handle cover and
housing, a serious risk of electric shock to the operator
would be created.
○ Do not tamper with parts other than those necessary to
eff ect carbon brush replacement.
7. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modifi cation and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool to
the Hitachi Authorized Service Center when requesting
repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
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