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Hitachi NT 65M2 - User Manual

Hitachi NT 65M2
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11-(6)
Switching
Device
Downward position
11-(4)
Switching
Device
Pull Trigger
Upward position
11-(1)
Do not
connect
air hose
Trigger
Push
Lever
Exhaust Cover
Bolt
10
11-(2)(3)
Do not pull
Trigger
Depress
Push Lever
Switching
Device
Upward position
9
Head Valve
Spring
Head
Valve
Piston
Cylinder
Head
Bamper
Cylinder
Plate
2
1
Allen Wrench For
M5 Screw
O-Ring Pick
Bolt
Exhaust Cover
4
Cylinder
Piston
6
Head Valve
Exhaust
Cover
7
O-Ring Pick
Old O-Ring
8
Body
Cylinder Plate
Head
Valve
Exhaust
Cover
Cylinder
3
5
For air leakage or sluggish operation.
FOR USE BY ONLY SERVICE PERSONNEL TRAINED
BY HITACHI, DISTRIBUTOR OR EMPLOYER.
FINISH NAILER
MODEL NT 65M2 / NT 65M2 (S)
Item
No.
1 885-672 Gasket
2 883-992 O-Ring
3 885-668 O-Ring
4 880-362 O-Ring
5 885-665 O-Ring
6 885-666 Cylinder Ring
O-Ring Pick
Tube Grease
Code No. Part Name
O-Ring Shown Actual Size
GENUINE PARTS
Body
6
Cylinder Plate
Cylinder
Piston
Exhaust Cover
Head Valve Spring
Head Valve
1
Head Bumper
2
3
5
4
Kit-
READ AND UNDERSTAND THIS MANUAL BEFORE DOING REPAIRS.
Only service personnel trained by Hitachi, distributor or employer shall
repair the Nailer.
Use only parts supplied or recommended by Hitachi for repair.
Before doing repairs,
1)WEAR SAFETY GLASSES;
2)DISCONNECT AIR HOSE FROM NAILER; and
3)REMOVE ALL NAILS FROM NAILER.
After doing repairs,
TEST NAILER PER ITEM No. 11 OF THIS MANUAL BEFORE USE.
If you have any questions regarding repair, use or safety warnings, call a
Hitachi authorized service center.
CAUTION ON REPAIR
Oily or greasy hands can slip easily.
Do not allow dust or foreign matter to enter Nailer.
Do not scratch the O-rings or O-ring contacting surface of any parts.
This will cause air leakage from Nailer.
DANGER
Pay attention not to scratch exhaust
cover and body when remove old
gasket.
Install new o-rings and cylinder ring as
shown right.
Install cylinder and piston into body.
Make sure that head bumper, head
valve spring and o-ring are properly
placed in head valve.
Install head valve into exhaust cover.
9.
8.
Wipe body, exhaust cover, head valve, cylinder plate and cylinder with
clean cloth.
Put an adequate amount of grease on shaded area of body, exhaust cover,
head valve, cylinder plate and cylinder. Put an adequate amount of grease on
new o-rings and cylinder ring.
[MODEL NT65M2]
(1) DISCONNECT AIR HOSE FROM NAILER.
REMOVE ALL NAILS FROM NAILER.
ALL SCREWS MUST BE TIGHTENED.
If any screws are loose, tighten them.
THE PUSH LEVER AND TRIGGER
MUST MOVE SMOOTHLY.
(2) Adjust the air pressure to 70 psi. (4.9 bar 5 kgf/cm
2
). Connect the air hose.
Do not load any nails in the Nailer. Set the switching device to the upward
position (SINGLE SEQUENTIAL ACTUATION MECHANISM). (Set the
switching device to the upward position completely as shown in the diagram.
Otherwise, it will not
operate properly.)
THE NAILER MUST
NOT LEAK AIR.
(3) Remove the finger from
the trigger and press
the push lever against
the wood.
THE NAILER MUST NOT OPERATE.
(4) Separate the push lever from the wood. Next, point the nailer downward, pull
the trigger and then wait in that position for 5 seconds or longer.
THE NAILER MUST
NOT OPERATE.
(5)
1
Without touching the
trigger, depress the
push lever against the
workpiece.
Pull the trigger.
THE NAILER MUST OPERATE.
2
Hold the trigger back while separating the push lever from the wood.
The nailer will remain in operated status (the driver blade will remain at
the bottom).
3
Remove the finger from the trigger.
Nailer operation will end (the driver blade will return to the top).
(6) Set the switching device to the downward position (CONTACT ACTUATION
MECHANISM). (Set the switching device to
the downward position completely as shown
in the diagram. Otherwise, it will not operate
properly.)
With the Nailer off the workpiece, pull the trigger.
Depress the push lever against the workpiece.
THE NAILER MUST OPERATE.
(7) If no abnormal operation is observed, you may load nails in the Nailer.
Drive nails into the workpiece that is the same type to be used in the actual
application.
THE NAILER MUST OPERATE
PROPERLY.
IMPORTANT SAFETY INSTRUCTIONS
HOW TO REPAIR
Install new gasket, exhaust cover and
four bolts. Using Allen wrench for M5
screw, tighten four bolts in a staggered
sequence.
10.
7.
Using o-ring pick, remove old o-rings.
Discard old o-rings.
6.
Remove head valve from exhaust
cover .
5.
Remove piston and cylinder.
3.
Remove all nails from the Nailer.
1.
The tools needed for repair are shown
below.
2.
Disconnect the air hose from the
Nailer.
4.
Using Allen wrench for M5 screw,
remove four bolts from exhaust cover.
Remove exhaust cover.
11. When reassembled, always conduct following tests in the following order.
If abnormal operation occurs, stop using the Nailer and contact a Hitachi
authorized service center immediately.

Other manuals for Hitachi NT 65M2

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Technical Data And Service Manual37 pages
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Questions and Answers

  • C
    christine60Jul 27, 2025
    What to do if nails clog the mechanism of my Hitachi Nail Gun?
    • G
      gcarterJul 27, 2025
      If nails are clogging the mechanism of your Hitachi Nail Gun, make sure you are using the specified nails. Also, check the magazine for improper nail feed (see Magazine in item 1 in the manual). If the driver blade is worn, replace it. Finally, ensure that the driver blade has returned completely (see Output section in item 1 in the manual).
  • R
    Reginald AndersonAug 3, 2025
    Why is the single actuation mechanism not working on my Hitachi NT 65M2 Nail Gun?
    • A
      abigail72Aug 3, 2025
      If the single actuation mechanism isn't working on your Hitachi Nail Gun, it could be due to a worn O-ring in the plunger or valve piston, in which case you should replace the part. It may also be caused by an abnormal plunger sliding surface of the valve piston (seized or deformed), or an abnormal plunger, trigger arm (C), push lever (B), and/or body (worn or damaged); replace the abnormal parts. Finally, ensure the switching device is set to the correct position.
  • L
    lynnsantiagoAug 8, 2025
    Why is the head of a nail protruding from the wood surface when using my Hitachi NT 65M2 Nail Gun?
    • S
      Samantha MurilloAug 8, 2025
      If the head of a nail protrudes from the wood surface when using your Hitachi Nail Gun, it could be due to several reasons. The adjuster might be improperly adjusted, so check if the nails are in the lowest position and drive a nail. The air pressure might be too low; adjust it to between 70 and 120 psi. The workpiece could be very hard, so avoid using unspecified workpieces. Other potential causes include a worn driver blade, an abnormal (worn or damaged) piston O-ring, or a cylinder with an abnormal (worn or rough) internal surface; in these cases, replace the defective part.
  • A
    Andrew RomeroAug 15, 2025
    What to do if my Hitachi NT 65M2 Nail Gun bends nails when driving?
    • C
      ckellerAug 15, 2025
      If your Hitachi Nail Gun is bending nails, it could be because, for short nails, the adjuster is raised too high; turn the adjuster to a lower position to decrease the pressure. It may also be that the nails are not fully fed into the injection port (refer to item 1 in the manual). A worn driver blade or using an unspecified, very hard workpiece can also cause bending; replace the driver blade or avoid using unspecified workpieces.
  • A
    amanda10Nov 19, 2025
    How to fix a Hitachi NT 65M2 when nails cannot be driven?
    • L
      Linda DunnNov 19, 2025
      If nails cannot be driven using your Hitachi Nail Gun, ensure the nail magazine is loaded with the specified genuine nails and that these nails are normal (not bent, with appropriately sized heads, and normal collation). If the collating band is abnormally adhesive, use specified nails and remove any abnormal nails, loading the magazine with normal ones. Also, inspect the nail groove of the magazine, the magazines (A) and (B), the nail feeder, the ribbon spring and the magazine cover for any abnormalities such as deformation or damage; repair or replace any defective parts. Remove any adhesive fragments and apply oil to the nail feeder, ribbon spring, and the nail rail. Check the nail inlet groove of the blade guide for deformation, burrs, or damage, and remove any adhesive fragments, repa...

Summary

Important Safety Instructions

Repair Preparation and Cautions

Caution on Repair

Notes on handling the nailer during repair to prevent damage or accidents, such as avoiding oily hands or dust entry.

How to Repair

Step-by-Step Repair Process

Detailed instructions for disassembling, cleaning, lubricating, and reassembling the nailer components.

Post-Repair Testing Procedure

Pre-Test Checks and Movement Smoothness

Ensure air hose is disconnected, nails removed, screws tightened, and push lever/trigger move smoothly.

Air Pressure and Sequential Actuation Test

Test for air leaks and correct operation with single sequential actuation mode.

Trigger and Push Lever Operation Tests

Verify nailer does not operate when push lever is depressed, and operates correctly after trigger release.

Contact Actuation Test

Confirm proper operation in contact actuation mode after reassembly.

Final Operational Test

Drive nails into workpiece to ensure proper operation under actual use conditions.

Hitachi NT 65M2 Specifications

General IconGeneral
BrandHitachi
ModelNT 65M2
CategoryNail Gun
LanguageEnglish

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