Hitachi NV 90HMC Handling Instructions Manual page 40

English
Head Diameter
ø 6.0 mm – ø 7.5 mm
(0.236" – 0.295")
ø 7.5 mm – ø 8.6 mm
(0.295" – 0.339")
CAUTION
Be sure to disconnect the air hose before operating the
nose switch lever.
NOTE
Be sure to switch to the appropriate nose for the nails to
be used. Selecting an inappropriate nose may cause
defective nailing or sparking. It may also cause a nail
jam, damage to this nailer or personal injury.
5. Load Nails
(1) Grip the nail guide and knob with fi nger.
Press the knob down and swing the nail guide open.
And open the magazine cover (Fig. 4).
(2) Adjust the position of the nail holder according to the
nail length (Fig. 5).
The nail will not feed smoothly if the nail holder is not
correctly adjusted (Fig. 6).
a. Turn the nail
counterclockwise.
b. Slide in vertical direction possible.
Lift or lower the nail holder to accept diff erent length
nails.
c. Adjust the plate to the nail length reference points
on the magazine cover and turn the nail holder 90
degrees clockwise until you hear "click".
(3) Place the nail coil into the magazine.
Uncoil enough nails to reach the driving hole (Fig. 7).
When using wire collated nails
Insert the fi rst nail into the driving hole and the second
nail between the two pawls of the feeder.
Fit the nail head in the guide slot (Fig. 8).
When using plastic sheet collated nails
Insert the fi rst nail into the driving hole and the second
nail between the two pawls of the feeder.
Fit the nail head and upper side of the plastic sheet in
the guide slot.
Fit the lower side of the plastic sheet in the guide slot for
plastic sheets (Fig. 9).
(4) Close the magazine cover fi rst and swing the nail guide
closed (Fig. 10).
(5) Lock the knob correctly.
NOTE
Be careful not to deform the collated wires and not to
disengage the nails with the guide surface.
Otherwise, the nail guide will not close correctly.
CAUTION
To prevent unintentional operation, never touch the
trigger or place the top end of the push lever on a work
bench or fl oor. 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 properly, nail feed may
jam. If the cover is forcibly closed without adjusting
the position of the nail holder, the nail holder may be
damaged.
40
Outlet size
Small
Large
holder about 90 degrees
HOW TO USE THE NAILER
CAUTION
○ 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. Set the lock lever to "Free" position
Turn the lock lever and align it with the "Free" position
(Fig. 11).
2. How to drive nails
This product is a nailer using SINGLE SEQUENTIAL
ACTUATION MECHANISM. If you pull the trigger fi rst,
nothing will happen even if you press the push lever up
against an object.
Depress the nail outlet onto the desired point; then pull
the trigger to drive a nail in a single shot (See Fig. 12).
After nailing once, nailing will not be possible again until
the trigger is released and pressed again.
You cannot drive a nail by fi rst pulling on the trigger
and then pressing the push lever against an object
(continuous nailing).
WARNING
A nail will fi re each time the trigger is depressed as long
as the push lever remains depressed.
CAUTION
Exercise care when nailing corners of lumber. When
continuous nailing corners of lumber, a nail may go
astray or break through the corner.
NOTE
○ 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 confi rm 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 2 cc
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.
3. Driving nails into steel plating
CAUTION
○ Use C-beam steel with a thickness of 3.2 mm or less.
○ Use hardened nails designed for use with steel plating.
○ Place the nailer vertically over the location into which
the nail is to be driven.
○ Do not drive nails directly into C-beam steel or attach
wire mesh laths, galvanized steel etc. directly onto it.
○ Do not use the nailer on roofs or ceilings.
○ Make sure that the thickness of the hardened nails
designed for use with steel plating are of the correct
thickness for the C-beam steel.
NOTE
Use the single shot setting to improve the fi nish after the
nails have been driven in.
Refer to the following table to select the correct nail shaft
diameter and length.
[Selecting Nail Shaft Diameter]
C-Beam Steel Thickness
2.3 mm or less
3.2 mm or less
Nail Shaft Diameter
2.8 mm
3.0 mm