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Problem
( : most-common cause)
Head valve (A) sliding
1) Nails cannot
surface is abnormal (seized
be driven.
or damaged, or lubrication is
(continued)
needed.)
Head valve spring is
abnormal (fatigued or
damaged).
< Control valve section >
Plunger (A), valve piston
(B), valve bushing (A) or
valve bushing (B) is
abnormal (seized or
damaged).
O-ring or sliding surface is
worn or needs lubrication.
Adjuster is raised too high
2) Nails are
for short nails.
driven but
Nails are not completely fed
bent.
into the injection port.
Unspecified nails are used.
Driver blade is worn.
Workpiece is too hard.
Adjuster is incorrectly set.
3) Nails cannot
be driven into
Air pressure is too low.
the workpiece
completely:
the heads
Workpiece is too hard.
cannot be
made flush.
Driver blade is worn.
O-ring in the piston is
abnormal (worn or damaged).
Cylinder inside surface is
abnormal (worn and rough).
Head valve (A) sliding
surface is abnormal (seized
or damaged, or lubrication
is needed).
Unspecified nails are used.
4) Nails jam.
< Improper nail feed >
See item "1) Magazine
section".
Driver blade is worn.
Possible cause
Inspection method
Perform idle driving to
check the driving operation.
Perform idle driving to check
that the driver blade is not
held in the down position.
Disassemble the control
valve section and check the
O-rings.
Check that the adjuster is
not raised too high.
See item 1).
Check that the driver blade
tip is not abnormally worn.
Check if a nail is bent even
when driven into soft wood.
Turn the adjuster to the
deepest driving position and
then drive nails.
Check if a nail is bent even
when driven into soft wood.
Perform idle driving to check
the driver blade is projected
from the nose tip.
Disassemble the output
section and check the o-ring
and the inside of the
cylinder for abnormality.
Check the sliding surface for
abnormality and lubrication.
Check if the specified nails
are used.
Check if they move
smoothly after loading nails,
and check if the nail feeder
operates smoothly.
Check that the driver blade
tip is not abnormally worn.
--- 17 ---
Remedy
Replace the part.
Apply grease.
Replace the part.
Replace the abnormal part.
Replace the abnormal part.
Apply grease.
Turn the adjuster lower
(lower the pressure).
See item 1).
Replace the part.
Regrind (see 9-2,
"Regrinding the Driver
Blade").
Nailer cannot be used
because the material is
beyond its applicable range.
Set the adjuster to the
optimum position.
Adjust the air pressure to 4.9
to 8.3 bar (5 to 8.5 kgf/cm
70 to 120 psi)
Nailer cannot be used
because the material is
beyond its applicable range.
Replace the part.
Regrind (see 9-2,
"Regrinding the Driver
Blade).
Replace the O-ring.
Replace the part.
Replace the part.
Apply grease.
Use specified nails.
See item "1) Magazine
section".
Replace the part.
Regrind (see 9-2, "Regrinding
the Driver Blade).
2
,
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