--- 14 ---
Cylinder inside surface is
abnormal (packed with dust,
or worn).
Head valve sliding surface is
abnormal (seized or
damaged, or lubrication is
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
for short nails.
Nails are not completely fed
into the injection port.
Unspecified nails are used.
Driver blade is worn.
Workpiece is too hard.
Adjuster is incorrectly set.
Air pressure is too low.
Workpiece is too hard.
Problem
Possible cause
( : most-common cause)
Inspection methods
Remedy
1) Nails cannot
be driven.
(continued)
Check that nails can be
driven at 4.9 bar (5 kgf/cm
2
,
70 psi).
Perform idle driving to check
the driving operation.
Perform idle driving to check
that the driver blade is not
held in the down position.
Remove dust and then
lubricate.
Replace the part.
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.
Nailer cannot be used
because the material is
beyond its applicable range.
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).
Nailer cannot be used
because the material is
beyond its applicable range.
2) Nails are
driven but
bent.
3) Nails cannot
be driven into
the workpiece
completely:
the heads
cannot be
made flush.
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
lowest position and then
drive nails.
Check if a nail is bent even
when driven into soft wood.
