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Piston O-ring is abnormal
(worn or damaged).
Cylinder inside surface is
abnormal (worn or rough).
Cylinder O-ring is abnormal
(worn or damaged).
Sliding surface of the
circumference of the cylinder
is abnormal (worn or
damaged).
Problem
Possible cause
( : most-common cause)
Inspection method Remedy
Apply grease.
Driver blade is worn.
Perform idle driving to
check the driver blade is
projected from the nose tip.
Replace the part.
Replace the abnormal part.
3) Nails cannot
be driven into
the workpiece
completely:
the heads
cannot be
made flush.
Apply grease.
Replace the abnormal part.
Readjust the safety bolt
according to 10-3-(2).
Short of oil on both inside
and outside surfaces of the
cylinder (worn or
damaged).
Disassemble the output
section and check inside
and outside surfaces of the
O-ring and the cylinder for
abnormality.
Disassemble the exhaust
valve section and check for
abnormality or shortage of
oil.
Check for shortage of
grease on the sliding
surface of the O-ring.
Exhaust valve is abnormal
or short of oil (worn or
scratches on seat side).
Safety belt is not adjusted
properly.
Check that the distance
between the lower end of
the nose and the lower end
of the pushing lever is
5 0.5 mm (0.197 0.020")
under the following
conditions.
Pull up plunger (B) until it
contacts plunger (A).
Pull up the pushing lever
until plunger (B) contacts
the safety bolt.
Air pressure is too low.
Adjuster is incorrectly set.
Turn the adjuster to the
deepest driving position and
then drive nails.
Set the adjuster to the
optimum position.
Adjust air pressure to
4.9 --- 8.3 bar (5 --- 8.5
kgf/cm
2
, 70-120 psi).
Check if a nail is bent even
when driven into soft wood.
Workpiece is too hard.
Nailer cannot be used
because the material is
beyond its applicable range.
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