Troubleshooting Guide; Troubleshooting And Correction - Hitachi NT65MA3 - 2-1/2 Angled Finish Nailer Service Manual

9. TROUBLESHOOTING GUIDE

9-1. Troubleshooting and Correction

Problem
( : most-common cause)
<Nails>
1) Nails cannot
be driven.
Magazine is not loaded with
specified genuine nails.
Magazine is loaded with
abnormal nails (bent nails,
abnormal collation, others).
< Magazine >
Nail feeder is abnormal
(burrs, deformed or
damaged).
Ribbon spring is abnormal
(fatigued or damaged).
Magazine groove too wide
or too narrow.
Nail rail groove width too
wide or too narrow.
Nail groove in the blade
guide is abnormal (burrs,
deformed or damaged).
Magazine cover is abnormal
(deformed or damaged).
Adhesive fragments and
wood chips are on the
magazine, nail feeder or
nail rail.
< Output section: piston,
driver blade, etc. >
Air pressure is too low.
O-ring in the piston is
abnormal (worn or
damaged).
Piston bumper is abnormal.
O-ring in the cylinder is
abnormal (removed,
deformed or damaged).
Driver blade is abnormal
(burrs, deformed or
damaged).
Bumper sheet is abnormal
(square hole worn, or
damaged).
Cylinder inside surface is
abnormal (packed with dust,
or worn).
Possible cause
Inspection method
Check that the magazine is
correctly loaded with
specified nails.
Check the nail feeding
section for abnormal
conditions (burrs, fatigued,
deformed, damaged).
Check if they move
smoothly after loading nails
and check if the nail feeder
operates smoothly.
Keep the nail feeder in the
back position after pulling it
backward and release the
lock lever for idle driving.
Then, check if the driver
blade and guide plate (A)
have returned.
Check the nails can be
driven at 4.9 bar (5 kgf/cm
70 psi).
--- 14 ---
Remedy
Use specified nails.
Remove the abnormal nails
and load the nailer with
proper nails.
Correct the burred or
deformed portion.
Replace the part.
Replace the part.
Replace the part.
Replace the part.
Correct the burred or
deformed portion.
Replace the part.
Replace the part.
After removing the adhesive
fragments and wood chips,
lubricate the nail rail.
Oil
Nail rail
Adjust the air pressure to 4.9
to 8.3 bar (5 to 8.5 kgf/cm
70 to 120 psi)
Replace the O-ring.
Replace the piston bumper.
Reassemble or replace the
parts.
Correct or replace the parts.
Replace the parts.
Remove dust and then
lubricate.
2 ,
Replace the part.
2 ,