Before Use - Hitachi WF 4H2 Handling Instructions Manual

English
APPLICATIONS
○ For hanging interior drywall on steel (max thickness of
0.8 mm) or wood studs.
○ Fastening plywood to wood studs.
PREPARATION PRIOR TO OPERATION
1. Prepare the hose
Use an air hose designed for high-pressure operation.
Be sure to use the hose provided with a minimum of
5 mm inside diameter and a maximum of 30 m long.
NOTE
○ The air supply hoses must have a minimum working
pressure rating of 29.4 bar.
○ Use a high-pressure air hose that is no longer than 30 m.
The pressure in a longer hose will drop, resulting in
misfi ring, misfeeding or incomplete insertion of screws.
2. Check on safety
CAUTION
○ Unauthorized persons (including children) must be kept
away from the equipment.
○ Wear eye protector.
○ Check the retaining screws which fi x the exhaust cover,
etc. for tightness.
Check the screw driver for air leaks and defective or rusty
parts.
○ Check whether or not the push lever works correctly.
Also check whether or not any dirt has adhered to the
moving parts of the push lever.
○ Recheck on operational safety.

BEFORE USE

1. Check the air pressure
CAUTION
Use a compressor designed for high-pressure operation.
The air pressure must be constantly maintained at 18 –
23 bar.
Adjust the air pressure between 18 to 23 bar according
to the diameters and length of screws and hardness of
the wood into which a screw is being driven. Pay special
attention to the output pressure, capacity, and piping on
the air compressor, so that air pressure does not exceed
the specifi ed limit. Note that excessive pressure may
aff ect overall performance, service life, and safety.
2. Lubrication
(1) Be sure to lubricate this screw driver at least twice a day.
To lubricate, pour 10 to 15 drops of oil into the air plug
before and after using this screw driver. The oil applied
before use lubricates this screw driver; the oil applied
after use prevents rust.
(2) It is recommended using the recommended oil (SHELL
TONNA). Other applicable oils are listed. Never mix two
or more types of diff erent oils.
3. Loading screws
CAUTION
When loading screws, always take your fi nger off the
trigger and disconnect the air hose.
(1) Put your fi ngers on the screw guide and the button, then
hold the button down and open the screw guide to the
left. (Fig. 2)
Next, open the magazine cover to the right.
(2) Put screws into the magazine, and pull the start of the coil
out from the magazine. (Fig. 3)
10
(3) Put the heads of the coil of screws just below the screw
head guide face and insert the fi rst screw in the muzzle
so the screw pickup comes between the fi rst and second
screws. (Fig. 4)
(4) Close the magazine cover fi rst.
Then put your fi ngers on the screw guide and the button,
pressing the button down and close the screw guide
completely while pressing the collated sheet against the
guide face. (Fig. 5)
NOTE
○ Pay attention to avoid the following kinds of situations,
as the screw guide may not close normally or the screws
may not feed properly.
• If screws or a collated sheet are not in the specifi ed
position.
• If screws are sticking up from the guide face.
• If screws are detached from the collated sheet.
○ Handle both screw packaging and individual screws
carefully. If screw(s) come off a collated sheet and you
try to use it, it may not feed properly, dry fi re and/or cause
a jam.
○ Do not leave screws exposed for a long time outside
or in direct sunlight. Doing so may result in rust and/or
deterioration of the collated sheet, so when not in use,
store screws in the box they came in.
4. Connecting an Air Hose
CAUTION
Pay attention to the following points when connecting an
air hose to the screw driver.
• Take care not to touch the trigger.
• Make sure the tip of the push lever is not pushed in on
a surface, such as a table or on the fl oor.
• Never point the muzzle at anyone.
○ Take the dust cap off the air plug, making sure no dust
or debris gets inside and wipe the mouth of the air plug
clean.
○ Push the air coupler fi rmly onto the air plug to connect the
air hose. (Fig. 6)
HOW TO USE THE SCREW DRIVER
Screw Driving Methods
There are two ways to drive screws, by fi rst pressing the
push lever against the desired material and pulling the
trigger, which is called "SINGLE SEQUENTIAL ACTUATION
MECHANISM of screw driver" or by fi rst pulling the trigger
and then pressing the push lever against the material, which
is called "CONTACT ACTUATION MECHANISM."
The SINGLE SEQUENTIAL ACTUATION MECHANISM
of screw driver is used when the fi nished appearance
is important or when you need to drive screws in exact
locations; by contrast, the CONTACT ACTUATION
MECHANISM is used when you want to drive one screw
after another without releasing the trigger. We recommend
the SINGLE SEQUENTIAL ACTUATION MECHANISM of
screw driver to drive screws more securely.
• Safety Mechanisms
This screw driver is built so it will not fi re unless both the
push lever and the trigger are operated at the same time.
As a result, the screw driver will not fi re when only the
trigger is pulled or when only the push lever is pressed
against the material to be fastened. This prevents the
unintentional fi ring of screws when the trigger is pulled or
the push lever bumped against something accidentally.