Hitachi NV 65AF3 Manual

COIL NAILER
NV 65AF3
LIST No. E005 Aug. 2002
POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
N
MODEL
NV 65AF3

REMARK:
Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s)
is(are) used in the place of company name(s) and model name(s) of our
competitor(s). The symbol(s) utilized here is(are) as follows:
Symbols Utilized Competitors
Company Name Model Name
MAX CN565S
S
MAKITA AN611
C
SENCO SCN55S
Q

Page
CONTENTS
1. PRODUCT NAME.....................................................................................................................1
2. MARKETING OBJECTIVE .......................................................................................................1
3. APPLICATIONS........................................................................................................................1
4. SELLING POINTS ....................................................................................................................1
5. SPECIFICATIONS ....................................................................................................................2
5-1. Specifications........................................................................................................................... 2
5-2. Nail Selection........................................................................................................................... 3
5-3. Nail Driving Force .................................................................................................................... 5
6. COMPARISONS WITH SIMILAR PRODUCTS ........................................................................6
6-1. Specifications........................................................................................................................... 6
6-2. Adjusting the Nailing Depth...................................................................................................... 7
6-3. Reduction of Exhaust Pressure with Muffler............................................................................ 7
6-4. Dual Action Trigger .................................................................................................................. 8
6-5. Precautions in Operation ......................................................................................................... 9
6-6. Loading Wire-collated Nails ..................................................................................................... 9
7. PRECAUTIONS IN SALES PROMOTION .............................................................................10
7-1. Instruction Manual ................................................................................................................. 10
7-2. Warning Label........................................................................................................................ 10
7-3. Related Laws and Regulations .............................................................................................. 10
8. MECHANISM AND OPERATION PRINCIPLE .......................................................................11
8-1. Mechanism .............................................................................................................................11
8-2. Operation Principle ................................................................................................................ 14
9. TROUBLESHOOTING GUIDE ...............................................................................................16
9-1. Troubleshooting and Correction.............................................................................................16
9-2. Possible Causes and Corrections of Air Leakage.................................................................. 21
10. DISASSEMBLY AND REASSEMBLY ..................................................................................24
10-1. General Precautions in Disassembly and Reassembly ....................................................... 24
10-2. Disassembly and Reassembly of the Output Section.......................................................... 25
10-3. Disassembly and Reassembly of the Control Valve Section ............................................... 26
10-4. Disassembly and Reassembly of the Magazine Section ..................................................... 29
10-5. Disassembly and Reassembly of the Driving Section ......................................................... 32
11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY ...........................................36
12. STANDARD REPAIR TIME (UNIT) SCHEDULES ...............................................................37
Assembly Diagram for NV 65AF3

--- 1 ---
1. PRODUCT NAME
Hitachi 2-1/2" Coil Nailer, Model NV 65AF3
2. MARKETING OBJECTIVE
Hitachi coil nailer Model NV 65AF3 has already been introduced on Japan market. This time, it will be put on
Oceania market to compete with S, C and Q. The Model NV 65AF3 is the most lightweight and powerful coil
nailer in this class and equipped with a muffler to minimize the exhaust sound and blowing dust. In addition, the
pop-out magazine allows easy nail loading from the top of the magazine thanks to the tiltable nail holder.
Please expand the sales of the new Model NV 65AF3 on Oceania market.
3. APPLICATIONS
Floor and wall framing
Truss and window built-up
Subflooring and roof decking
4. SELLING POINTS
Lightweight, only 1.9 kg (4.2 lbs.)
Reduce exhaust
pressure with muffler
Easy nail loading with
pop-out nail holder
More powerful 10% than S
Dual action trigger
(Contact and single sequential action)

--- 2 ---
Optional accessories
Air consumption
1.9 kg (4.2 lbs.)
PT 1/4 Thread
Corrugated cardboard box (sleeve type)
Min. 3 nails/sec.
Driving speed
282 mm x 297 mm x 128 mm
(10-13/16" x 11-5/8" x 5")
1.6 ltr/cycle at 7 kgf/cm2(0.056 ft3/cycle at 100 psi)
Dimensions
(Length x height x width)
Nail capacity
PT 1/4 Japanese
Standard accessories
Weight
200 --- 400 nails (1 coil)
Air inlet
Air plug
Packaging dimensions
(Length x height x width)
Packaging
355 mm x 410 mm x 170 mm
(13" x 16-5/32" x 6-11/16")
*Carrying case
Eye protector
Oiler
Nose cap
5. SPECIFICATIONS
5-1. Specifications
Reciprocating piston type
Model
Driving system
NV 65AF3
Operating pressure 5 --- 8.5 kgf/cm2(Gauge pressure) {70 --- 120 psi, 4.9 --- 8.3 bar}
Length: 32 --- 65 mm
Applicable
nail sizes Wire collated
Plastic sheet collated Length: 32 --- 50 mm

--- 3 ---
5-2. Nail Selection
The Model NV 65AF3 utilizes common round-head nails collated by wire or plastic sheet into coils from 200 to 400
nails. Applicable nail dimensions are shown below.
CAUTION: Ensure that nails are as specified in Fig. 1. Other nails will cause clogging of nails
and subsequent damage to the nailer.
5 mm
(0.197")
38 mm (1-1/2")
Min.
Fig. 1 Dimensions of nails
Max.
6 mm
(0.236")
2.8 mm
(0.110")
2.4 mm
(0.094")
4.8 mm
(0.189")
32 mm (1-1/4")
Min. Max.
6 mm
(0.236")
65 mm (1-1/2")
2.8 mm
(0.110")
2.1 mm
(0.083")
Wire-collated nails Sheet-collated nails
57 mm (2-1/4")

--- 4 ---
Unit: mm (inch)
Fig. 2 Dimensions of wire-collated nails
38 ---57
(1-1/2 ---2-1/4)
L2.3 ---2.8
(0.090 ---0.110)
d20
(0.787)
D2 D1
61.5
(2.421)
118
(4.645)
H
Fig. 3 Dimensions of sheet-collated nails
32 ---57
(1-1/4 ---3-1/4)
45 ---65
(1-3/4 ---2-1/2)
L
2.1 --- 2.3
(0.083 ---0.090)
2.5 --- 2.8
(0.099 ---0.110)
d
Type
B
A0.6
(0.024)
19
(0.748) 37.5
(1.476)
d1L1L2
65
72
H
0.7
(0.028)
12
(0.472) 24
(0.945) 22 ---30
(0.866 ---1.181)
D1
118 MAX
(4.645 MAX)
D2
6 or 8
(0.236 or 0.315)

--- 5 ---
20
0100
0.15
2.3 X 38 mm (0.090" X 1-1/2")
Size of nail
Air pressure setting to drive nail flush with NV 65AF3
2.3 X 45 mm (0.090" X 1-3/4") 2.5 X 50 mm (0.099" X 2") 2.5 X 57 mm (0.099" X 2-1/4") 2.5 X 65 mm (0.099" X 2-1/2")
0.20 0.25 0.30 0.35
150 200 250
20
40
60
80
200
400
600
800
40
60
(ft-lb)
(mm
2
)
(in
2
)(kgf/cm
2
)
(psi)
(J)
20
04
4
5 6 7 8 8.3
20
40
60
80
200
400
600
800
40
60
(ft-lb)
(bar)
(kgf
• cm)(kgf • cm) (J)
5 6 7 8 8.5
60 70 80 90 100 110 120
NV 65AF3
Hemlock
2.8 X 65 mm (0.110" X 2-1/2")
C
S
5-3. Nail Driving Force
Fig. 4 shows by type of wood and nail the nailer output energy provided by the supply pressure and the nailing
energy required for driving the nail flush. Air pressure which exceeds the intersecting point between the nailer
output energy and the required nailing energy for driving the nail allows the nail to be fully driven.
For example, when driving a nail of 2.5 mm dia. x 65 mm length (0.099" x 2-1/2") into a workpiece of hemlock with
the Model NV 65AF3, a pressure of about 6 bar (6.1 kgf/cm2, 87 psi) allows the nailer to drive the nail flush with
the wood surface. A pressure beyond this value causes the nail head to be driven below the wood surface.
Fig. 4 should be used as a reference only because those values vary depending on the type of wood, moisture
content, and grain of wood.
Fig. 4 Required nailing energy and nailer output energy
Required nailing energy Nailer output energy

--- 6 ---
Length
Dimensions Height
Width
Trigger lock
Nailing system
Depth adjustment
Toe nailing
Dust filter
Belt hook
Piston
Contact top
Case
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specifications
Maker
Air consumption at
100 psi (6.9 bar)
Operating pressure
Applicable
nails
Nail loading
Magazine type
Weight
Nail capacity
Length
Exhaust muffler
(noise level)
Shank dia.
Collation type
Model name
Head dia.
HITACHI
NV 65AF3
5 --- 8.5 kgf/cm2
(70 --- 120 psi)
(4.9 --- 8.3 bar)
1.9 kg (4.2 lbs.)
282 (11-3/32)
297 (11-5/8)
128 (5)
1.6 ltr/nail
Side open and pop-
out nail holder
200 --- 400
Poly-carbonate
Wire
32 --- 65
2.1 --- 2.8
4.8 --- 6.0
Provided
(91 dB)
Provided
Auto contact/single
Dial
Aggressive
Not provided
Provided
Piston ring
Provided
Provided
Sheet
38 --- 57
2.4 --- 2.8
5.0 --- 6.0
2.6 kg (5.8 lbs.)
267 (10-1/2)
327 (12-7/8)
---
---
Side open
350
---
Wire
32 --- 65
Not provided
( --- )
Not provided
Contact
Plain
Not provided
Not provided
O-ring
Provided
Not provided
Sheet
32 --- 65
4.5 --- 8.5 kgf/cm2
(65 --- 120 psi)
(4.4 --- 8.3 bar)
2.2 kg (4.9 lbs.)
332 (13-1/16)
317 (12-15/32)
---
1.8 ltr/nail
Side open
200 --- 400
---
Wire
32 --- 65
Not provided
(96 dB)
Provided
Contact/single
Dial
Aggressive
Provided
Not provided
O-ring
Provided
---
Sheet
32 --- 50
S
5 --- 7 kgf/cm2
(70 --- 100 psi)
(4.9 --- 6.9 bar)
2.2 kg (4.9 lbs.)
273 (10-3/4)
318 (12-9/16)
130 (5-1/8)
1.5 ltr/nail
Side open
250 --- 400
6-nylon
Wire
38 --- 65
2.1 --- 2.5
4.8 --- 6.0
Not provided
(92 dB)
Provided
Auto contact/single
Dial
Plain
Provided
Not provided
O-ring
Provided
Provided
Sheet
32 --- 65
2.3 --- 2.5
5.0 --- 6.0
CQ
---

--- 7 ---
6-2. Adjusting the Nailing Depth
The nailing depth is adjustable by turning the adjuster.
* Adjusting the adjuster (Fig. 5)
Fig. 5
Flush
Adjuster
Too deep
(Turn the
adjuster to the
shallow side.)
Too shallow
(Turn the
adjuster to the
deep side.)
Fig. 6
Carry out test driving. If the nails are too deep, turn the adjuster to the shallow side ( mark). If the nail
depth is too shallow, turn the adjuster to the deep side ( mark) (see Figs. 5 and 6). Depth is changed 1 mm
with each rotation of the adjuster.
Do not push up the pushing lever when turning the adjuster.
Place the lock lever in "FREE" position when driving nails.
6-3. Reduction of Exhaust Pressure with Muffler
Comparison of blowing dust (The area where concrete dust is blown is shown in black.)
Conditions: Nailed 5 times at 0.69 Mpa {7 kgf/cm2}. Used concrete dust.
NV 65AF3
Testing method
Actual example: A glove
was set to the air outlet
of the nailer to avoid
blowing dust (at the
interior finish work site)
Concrete dust is
placed on a board.
Concrete dust
Air outlet
Lock
Lock lever
FREE
SHALLOW
DEEP
CS
70 mm
520 mm
660 mm