Inspection And Maintenance - Hitachi NR 90AC2 Instrucciones De Manejo

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. Preventive mechanism for unloaded operation (See
Fig. 3)
The machine employs a preventive mechanism for
unloaded operation.
The machine enters a state where the push lever
stopper runs into the upper part of the push lever and
the push lever cannot be pushed up. This takes place
when the magazine is not loaded with nails or when
the remaining number of nails becomes less than 5
(This differs by the type of nail).
Load the nails immediately if you come across with
such a condition during operation.
2. 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. 4)
CAUTION:
This tool will sometimes fire twice 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. 4) 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. 5).
CAUTION:
Excercise care when nailing corners of lumber. When
continuous nailing corners of lumber, a nail may go
astray or break through the corner.
Do not drive a nail on another nail.
Do not drive a nail on metal parts.
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 damper, 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 5–10
drops 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. Adjusting the nailing depth (See Fig. 6)
To assure that each nail penetrates to the same depth,
be sure that:
(1) the air pressure to the Nailer remains constant
(requlator is installed and working properly), and
(2) the Nailer is always held firmly against the
workpiece.
If nails are driven too deep or shallow into the
workpiece, adjust the nailing in the following order.
1 DISCONNECT AIR HOSE FROM NAILER.
2 If nails are driven too deep, turn the adjuster to
the shallow side.
Adjustments are in half-turn increments.
If nails are driven too shallow, turn the adjuster to
the deep side.
3 Stop turning the adjuster when a suitable position
is reached for a nailing test.
4 Connect the air hose.
ALWAYS WEAR EYE PROTECTOR.
Perform a nailing test.
5 DISCONNECT AIR HOSE FROM NAILER.
6 Choose a suitable position for the adjuster.
4. Changing the exhaust direction
The direction of the exhaust vent can be changed by
turning the top cover.
5. Using the nose cap (See Fig. 7)
If you like to protect the surface of workpiece against
scratches or markings made by the push lever, attach
the accessory nose cap to the push lever.
1 DISCONNECT AIR HOSE FROM NAILER.
2 Put the nose cap to the toe of the push lever.
NOTE:
The nose cap may reduce nailing depth due to its
thickness. Re-adjustment of nailing depth is required.

INSPECTION AND MAINTENANCE

CAUTION:
Be sure to disconnect the hose during cleaning
jams, inspection, maintenance and cleaning.
1. Inspecting the magazine
1 DISCONNECT AIR HOSE.
2 Clean the magazine. Remove plastic tips or wooden
tips which may have accumulated in the magazine.
Lubricate it with Hitachi pneumatic tool lubricant.
2. Check on mounting screws for each part
At regular intervals check every part for loose
mounting screws and whether or not there are any
air leaks. Retighten any loose screws. Operating the
equipment with loose screws untightened will incur
a hazard.
3. Inspecting the push lever
Check if the push lever (Fig. 4) can slide smoothly.
Clean up the sliding area of the push lever and use
the provided oil for lubrication from time to time.
Lubrication enables
simultaneously serves to prevent the formation of
rust.
4. Storing
When not in use for an extended period, apply a thin
coat of the lubricant to the steel parts to avoid rust.
Do not store the Nailer in a cold weather environment.
Keep the Nailer in a warm area.
When not in use, the Nailer should be stored in a warm
and dry place.
Keep out of reach of children.
5. Service parts list
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
English
smooth sliding and
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