Hitachi NV 50A1 Instrucciones De Manejo página 10

English
4. Inspecting the drive bit
If the top end of the drive bit is slightly rounded to an
extent that nail heads slightly float above the work
surface, or the nails are often bent, remove the drive
bit and finish off the top end with a file or grinder.
(1) Removing procedures
(a) Remove four hexagon socket hd. bolts to
disassemble the exhaust cover, whereby the piston
is exposed. (See Fig. 10)
(b) Insert an appropriate rod into the nail outlet to
withdraw the piston from the opposite side. (See
Fig. 11)
(2) Grinding procedures
(a) When grinding the top end by using a grinder, to
avoid wear, gradually grind it while cooling the
grinding part with water. Excessive grinding may
shorten the Nailer service life.
(b) If nail heads still float above the work surface even
though the top end is ground, replace the drive bit
with a new bit. (Replace the drive bit when
projection beyond the top of tail cover is reduced
to approximately 3 mm (.12").) Drive bits are
available from the dealer where you ordered the
nailer.
(3) Reassembling procedures
Effect reassembling procedures in reverse order to
those of disassembling. Confirm that the drive bit is
fully inserted the nail outlet. Then reassemble the
exhaust cover. Finally apply a thin coat of grease
(Attolub No. 2 Grease) to the O-ring and interior
surface of the cylinder. (See Fig. 12)
CAUTION
A cracked drive bit may cause damage. Prior to
reassembling the drive bit, be sure to check for such
cracks.
5. Inspecting the piston
A depletion of cylinder oil or a worn O-ring may
restrict smooth operation. In such instances remove
the piston as illustrated in Figs. 10, 11 and 12 and clean
the cylinder interior. Then apply 2cc of the
recommended oil over the cylinder interior surface. If
the piston still refuses to offer smooth operation,
replace the worn O-ring.
Also, apply a thin coat of grease (Attolub No. 2 Grease)
to the cylinder interior and the O-ring.
CAUTION
Never clean the O-ring with gasoline, thinner, or
similar substance.
6. Inspecting the feeders
(1) Occasionally clean the knob sliding part and then
apply the recommended oil. (See Fig. 13)
(2) Open the nail guide and remove dust, etc., as shown
in Fig. 14. Apply lubricant to the sliding groove of the
feeder and feeder shaft. Check the main nail stopper
and sub nail stopper slide smoothly by pushing them
with your finger.
(3) Also, apply the recommended oil to the feeding sur-
face of the nose and nail guide after cleaning. This
promotes smooth operation and retards corrosion.
CAUTION:
Check for smooth movement of the feeders and
stoppers before use. If movement is uneven, nails
could be fired at an irregular angle, presenting a
hazard to the operator and others nearby.
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7. Service parts list
A : Item No.
B : Code No.
C : No. Used
D : Remarks
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool
to the Hitachi Authorized Service Center when re-
questing repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATIONS:
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
COMPRESSOR
CAUTION:
When the maximum, operating pressure of the air
compressor exceeds 8.3 bar (120 psi.), be sure to
provide a reducing valve between the air compressor
and nailer. Then, adjust the air pressure within the
operating range of 4.9 ~ 8.3 bar (70 ~ 120 psi.). If the air
set is installed, lubrication is also possible, thus
providing additional convenience.
OILER-FILTER-REDUCING VALVE (Air Set)
So that the equipment can be operated under an optimum
condition to ensure extended service life, it is advisable to
use an oiler filter reducing valve. Please limit the length of
the hose between the unit and the air set to within 10m
when using.
APPLICABLE LUBRICANTS
Type of lubricant
Recommended oil
Motor oil
Turbine oil
Name of lubricant
SHELL TONNA
SAE10W, SAE20W
ISO VG32 – 68
(#90 – #180)