Inspection And Maintenance - Hitachi NV 50A1 Mode D'emploi

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. Clamp and raise the nail holder with
two fingers and turn it to align the mark with the
numbers (50, 45, 38, 32) (Fig. 2).
(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 the 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) Grip the nail guide and knob. Then depress the knob
and turn the nail guide to the right. Nails are loaded by
adopting the above procedures.
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.

INSPECTION AND MAINTENANCE

CAUTION:
Be sure to disconnect the hose during cleaning
jams, inspection, maintenance and cleaning.
1. Countermeasure for nail jamming
(1) Remove the nail oil roll from the magazine, open the
nail guide, insert a rod into the nail outlet and tap the
rod with a hammer. (Fig. 8).
(2) Remove the jammed nail with . screw driver. (Fig. 9)
(3) Cut off the defective part of the steel wire which links
the nails with cutting nippers, correct the deformation,
then load the nail roll in the magazine.
(4) In case of frequent jam, consult the Authorized Service
Agent from which you bought this machine.
2. Inspection and maintenance
Periodically inspect the device.
(1) Remove the four hexagon socket hd. bolts securing
the exhaust cover and remove the exhaust cover.
Then, cylinder, piston, and other parts can be removed
in respective assembly groups.
Wipe the drive bit, the piston sliding part and the body
interior with a cloth to remove deposited dirt.
(2) Confirm that the piston damper offers normal
operation. A damaged piston damper may cause
damage to other component parts.
(3) Carefully check the O-ring for wear while
disassembling. A worn or
deteriorate overall performance. Replace a worn or
damaged O-ring with new one.
(4) Prior to reassembling the device, apply grease (Attolub
No. 2 Grease) to the O-ring. Also, lubricate the device
with the recommended oil.
3. 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.
English
damaged O-ring may
8