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Fault
(The mark * refers to main causes.)
(1)
The spring of the head
Nails fail to
valve is abnormal (fatigued
eject.
and/or damaged).
(Continued)
< Control valve section >
Plunger (A), valve piston
(B), valve bushing (A) and
valve bushing (B) are
abnormal (seized and/or
damaged).
O-rings are worn.
(2)
When driving a short nail,
Nails are
the adjuster set for
driven bent.
insufficient depth.
Nails are not completely fed
in the injection port.
Nails not approved by
Hitachi are used.
* The driver blade is worn.
The wood being nailed is
very hard.
Nails not approved by
Hitachi are used.
(3)
The adjuster is incorrectly
Nails cannot
set.
be driven
into the
Air pressure is low.
wood
completely:
the heads
cannot be
The wood being nailed is
made flush.
excessively hard.
* The driver blade is worn.
* The piston ring is
abnormal (worn and/or
damaged).
The inner face of the
cylinder is abnormal (worn
and/or rough).
The cylinder plate or the
O-ring is abnormal
(dislocated, deformed
and/or broken).
The sliding face of the head
valve is abnormal (seized,
damaged, and/or oil has
depleted).
Cause
Inject air to check whether or
not the driver blade is left
lowered.
Inject air to check whether or
not the driver blade is left
lowered.
Disassemble the control valve
and check the O-rings.
Check whether or not the
adjuster is set for insufficient
depth.
Refer to Item 1.
Check whether or not the
driver blade head is
abnormally worn.
Check whether or not the nail
is bent, even when it is driven
into soft wood.
Check whether or not the nail
is appropriate for metal
reinforcing plates.
Try to drive nails with the
adjuster set to maximum
depth.
Check whether or not the nail
heads are flush with the
surface when driven into soft
wood.
Inject air and check whether
or not the driver blade sticks
out from the nose.
Disassemble the output
section and check whether or
not the piston ring, the O-ring
and the cylinder are normal.
Disassemble the cylinder
plate section and check for
abnormality.
Check whether or not the
sliding face is abnormal and
oil has depleted.
Inspection method
--- 16 ---
Remedy
Replace parts.
Replace abnormal parts.
Apply grease or replace it.
Use the nailer with the
adjuster set to greater depth.
(Decrease the pressure.)
Refer to Item 1.
Replace it.
The nailer cannot be used
because the material is
beyond its applicable range.
Use nails approved by Hitachi.
Adjust the adjuster to the
optimum depth.
Adjust air pressure in the range
of 4.9 --- 8.3 bar (5 --- 8.5 kgf/
2
cm
, 70 --- 120 psi).
The nailer cannot be used
because the material is
beyond its applicable range.
Replace it.
Replace the abnormal parts.
Replace the abnormal parts.
Replace the abnormal parts.
Apply grease.
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