Hitachi NV 83A Handling Instructions Manual page 9

Adjust the oiler so that a single drop of oil is supplied
at intervals of 5 to 10 nailing cycles.
(2) It is recommended using the recommended oil (SHELL
TONNA). Other applicable oils are listed. Never mix
two or more types of different oils.
3. Load nails
(1) Press the lever and open the cover (Fig. 1).
(2) Adjust the position of the nail holder according to the
length of the nail. (Fig. 2)
When turning the nail holder about 90 degrees
counterclockwise (a), the groove of the holder shaft
is disengaged and sliding in vertical direction becomes
possible. (b)
Adjust the plate with the magazine cover graduation
and determine the height of the nail holder, then turn
the nail holder 90 degrees clockwise until you hear
"click". (c)
(3) Load the nails in the magazine. Insert the beginning of
the nail into the opening of the magazine to facilitate
the following procedures (Fig. 3).
(4) Close the cover after confirming that the nails are
loaded in the magazine.
(5) Grip the nail guide and knob with fingers. Then depress
the knob to open the nail guide towards the left. (See
Fig. 4)
(6) Extend the nail line from the magazine. Insert the first
nail into the driving hole and the second nail between
the two pawls of the feeder. Insert the nail so that the
nails head engages the guide slot. (Fig. 5).
Take care not to deform the steel wire which links the
nails and check the nails are engaged with the guide
surface. If not, the nail guide cannot be closed correctly.
(7) Turn the nail guide to the right until it locks completely.
The loading of nails has now been completed.
NOTE
If you pull the nails toward the right side (Fig. 5), the
nail guide can be smoothly closed.
CAUTION
To prevent unitentional operation, never touch the
trigger or place the top end of the push lever on a work
bench or floor. Also, never face the nail outlet toward
any part of a person.
NOTE
Before loading the nails in the magazine, position the
nail holder according to the length of the nail. If the nail
holder position is not adjusted, the nail jam. If the
cover is forcibly closed without adjusting the position
of the nail holder, the nail holder may be damaged.
HOW TO USE THE NAILER
CAUTIONS:
Never use the head or body of this device as a
hammer.
Take precautions to ensure the safety of persons in
the vicinity during operation.
1. Nailing procedures
(1) Intermittent nailing
Depress the nail outlet onto the desired point; then
pull the trigger to drive a nail in a single shot. (See Fig.
6)
CAUTION
This tool will bounce and shoot several nails instead
of just one in rapid succession when strongly pressed
flush against a surface or when using on hard materials.
In such cases, fire the nails by squeezing and quickly
releasing the trigger.
(2) Push lever
When depressing the nail outlet, be sure to fully lift the
push lever (see Fig. 6) to release the safety lock. Thus,
nails cannot be driven without releasing the safety
lock even though the trigger is pulled.
(3) Continuous nailing
First, pull the trigger. Then depress the devise onto the
desired position to automatically drive nails. (See Fig.
7).
CAUTION:
Exercise care when nailing corners of lumber. When
continuous nailing corners of lumber, a nail may go
astray or break through the corner.
NOTES:
Precautions on no-load operation
Sometimes nailing will continue after driving in all
nails previously contained in the magazine.
This is termed "no-load operation". Such operation
may deteriorate the bumper, magazine, and nail feeder.
To avoid no-load operation, occasionally confirm the
amount of remaining nails. On the other hand, all nails
should be removed after using this nailer.
After completing operation, put into the body about
2cc oil through the hose joint to protect the tool from
rust.
Under low temperature conditions, the machine
sometimes does not operate correctly. Always operate
the machine at the appropriate ambient temperature.
2. How to adjust the nailing depth
The nailing depth of this unit can be adjusted by
changing lock positions of the 2 adjustment nuts on
the nail guide shaft.
If nails are forced too deeply into the material being
nailed, this can also be corrected by reducing the air
pressure.
CAUTIONS
Before adjustment, always disconnect the hose and
release compressed air in the power tool.
During adjustment always keep your finger off the
trigger.
During adjustment make sure that no part of the body,
hands, or legs is ever in front of the nail outlet.
Please carry out adjustments in the following order. (See
Fig. 8). Open the nail guide and lower the nail guide shaft
until it comes in contact with the push lever, then untighten
the 2 locked nuts with the supplied wrenches (2).
Next, turn the 2 nuts and remove them from the head of
the nail guide shaft. (Normally, lower the nuts until they
contact the head of the nail guide shaft, and lock them.)
Perform a nailing test and tighten and lock the 2 nuts with
the supplied wrenches after having chosen a suitable
position.
(Tightening torque: 35 ± 3 kg.cm (2.5 ± 0.2 ft.lb)
NOTE
Please use the minimum air pressure that is sufficient
to drive the nails to a suitable depth. If an overly high
pressure is used, the life of the piston damper etc. will
be shortened.
If the gap (S) between the head of the nail guide shaft
and the nut is too big, the nail driving operation
becomes impossible.
As a rough guide, adjust so that S is within a range of
S 4 mm (.16").
English
8