Hitachi NV 75AG User Manual

--- 14 ---
Deburr the nail guide face.
Correct the deformed part.
Replace the abnormal parts.
Problem
Possible cause
( : Most-common cause)
Inspection method Remedy
9. TROUBLESHOOTING GUIDE
9-1. Troubleshooting and Correction
1) Nails cannot
be driven.
<Nails>
Magazine is not loaded with
specified genuine nails.
Magazine is loaded with
abnormal nails (bent nails,
too large or too small nail
heads, abnormal collation,
others).
Nails or link pieces are
jammed.
Link pieces are deformed or
broken.
<Driving section: Nose, feeder,
feed piston, etc.
>
Sliding resistance of the
feed piston is too high.
Nail guide face of the nose
is abnormal (deformed,
burrs or damaged).
Feed spring or feeder spring
is abnormal (damaged or
fatigued).
Feeder is abnormal
(damaged or worn).
Nails are not correctly
loaded in the groove of the
nose.
Dust sticks to the feeder
sliding portion of the nose,
or lubrication is needed.
Air pressure is too low.
Air passage is clogged
with broken pieces of
piston bumper, etc.
Feed piston chamber
contains foreign matter
such as broken pieces of
piston bumper, etc.
Check that the magazine is
correctly loaded with
specified nails.
Remove the feed piston
and check the feed
piston sliding surface of
the nose.
Use specified nails.
Remove the abnormal nails
and load the nailer with
proper nails.
Check that nails are
correctly loaded in the
groove of the nose.
Open the nail guide and
perform idle driving to check
the feeder's operation.
Apply grease to the sliding
surface.
Polish the scratched portion
with sandpaper. Replace
the parts.
Remove dust and then
lubricate the sliding surface.
Adjust the air pressure to
5 --- 8.5 kgf/cm
2
(4.9 --- 8.3
bar, 70 --- 120 psi).
Remove foreign matter.
Replace the piston bumper
with new one.
Body ••• Remove foreign
matter in the return
air chamber.
Nose ••• Remove foreign
matter in the air
passage and the
feed piston
chamber.
Check that the driving
section is not abnormal
(burrs, deformed, damaged
or worn).
Load nails in the correct
position in the nose.

Hitachi NV 75AG Specifications

General

Brand	Hitachi
Model	NV 75AG
Category	Power Tool
Language	English