Hakko Electronics 374 User manual

Thank you for purchasing the Hakko 374 Self Feeder.
Please read this manual carefully before operating the Hakko
374. Store the manual in a safe, easily accessible place for
future reference.
TABLE OF CONTENTS
SAFETY INSTRUCTIONS / SPECIFICATIONS............................... 1
PART NAMES (FEED CONTROLLER UNIT) .................................. 2
ASSEMBLY (IRON SIDE) ................................................................ 3
ASSEMBLY (FEED CONTROLLER UNIT) ...................................... 4
OPERATION .................................................................................... 5
MAINTENANCE / OPTIONAL FEEDER PEN .................................. 6
OPTIONAL FEEDER PEN / OPTIONS AND REPLACEMENT PARTS ...... 7
OPTIONS AND REPLACEMENT PARTS........................................ 8
PARTS LIST............................................................................... 9, 10
TROUBLESHOOTING ................................................................... 11
FEEDER WITH
SOLDER CUTTING FUNCTION
TROUBLESHOOTING
When the Hakko 374 fails to feed the solder properly, check the following items.
Do the parts match the solder diameter?
Is the tension adjusted properly?
Is the tube bent or twisted?
Have solder and ux accumulated on the
driving pulley, the following pulley, and the
cutting blade?
Is the tension adjustment screw tight?
Is the arm mounting screw tight?
Is the guide pipe clogged with ux?
Is the tip of the nozzle clogged with ux?
Is the mini plug connected properly?
Is the fuse blown?
Is the power supply of the correct voltage
and frequency?
Are the feed speed and the feed time
appropriate?
Is the tip temperature appropriate?
2016.1
MA00519XZ160128
11
CAUTION
This product includes such features as electrically conductive plastic parts and grounding of the
handpiece and station as measures to protect the device to be soldered from the effects of static
electricity. Be sure to observe the following instructions:
1. The handle and other plastic parts are not insulators, they are conductors. When replacing parts or
repairing, take sufficient care not to expose live electrical parts or damage insulation materials.
2. Be sure to ground the unit during use.
© 2000-2016 HAKKO Corporation. All Rights Reserved.
OVERSEAS AFFILIATES
U.S.A.: AMERICAN HAKKO PRODUCTS, INC.
TEL: [phone] FAX: [phone]
Toll Free (800)88-HAKKO
4 2 5 5 6
http://www.hakkousa.com
HONG KONG: HAKKO DEVELOPMENT CO., LTD.
TEL: [phone] FAX: [phone]
http://www.hakko.com.hk
E-mail:[email protected]
SINGAPORE: HAKKO PRODUCTS PTE., LTD.
TEL: [phone] FAX: [phone]
http://www.hakko.com.sg
E-mail:[email protected]
Please access to the following address for the other Sales affiliates.
http://www.hakko.com
HEAD OFFICE
4-5, Shiokusa 2-chome, Naniwa-ku, Osaka 556-0024 JAPAN
TEL:[phone] FAX:[phone]
http://www.hakko.com E-mail:[email protected]

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
ve
sher
minal
e 8)
M3
h
ss
5.5
Nut P0.75 2t (2)
External
tooth washer
(nominal
size 4)
Pan head screw
with washer
M4 5
(with spring
washer)
Pan head screw
with washer
M3 6 (with spring,
plain washer) (2)
Pan head
screw
M3 4 (8)
Pan head screw
with washer
M4 5 (with spring
washer) (2)
Pan head screw with washer
M3 5 (with spring washer) (4)
10
Note: Spare or repair parts do not include mounting screws, if they are
not listed on the description. Screws must be ordered separately.
SAFETY INSTRUCTIONS
To avoid injury, do not attempt to assemble
while the soldering iron is hot.
The cutting plate is sharp. Be careful not to
cut your ngers.
When resin core solder that has been cut
is not used, the properties of the resin ( ux)
may deteriorate with time.
Once the solder has been cut and is inside
the guide pipe, the heat from the soldering
iron may accelerate the deterioration of the
resin ( ux). Use solder that is inside the guide
pipe as soon as possible.
Do not damage the guide pipe by bending or
twisting it.
Do not allow the tube to be bent at a severe
angle. Otherwise, it will become clogged with
solder.
Keep the cutting blade, driving pulley, and
following pulley clean of solder and ux using
a brush or other suitable cleaning device.
The switch input is no-voltage input. Do not
apply voltage to the switch jack.
Periodically remove the nozzle and clean off
any accumulated ux.
Do not damage the return length adjustment
knob by turning it with excessive force.
This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities,
or lack of experience and knowledge,
unless they have been given supervision or
instruction concerning use of the appliance
by a person responsible for their safety.
Children should be supervised to ensure that
they do not play with the appliance.
SPECIFICATIONS
Power consumption
Motor rating
Solder diameter
Solder feed time
Solder feed speed
Solder feed quantity
Solder return quantity
Outer dimensions
Weight
6 W
24V DC, 3.2 W
0.6, 0.8, 1.0, 1.2, 1.6 mm
(0.02, 0.03, 0.04, 0.05, 0.06 in.)
0 to 7 sec.
4.5 to 26 mm/sec.
(0.18 to 1.02 in./sec.)
0 to 182 mm
(0 to 7.17 in.)
0 to 5 mm
(0 to 0.2 in.) (fixed speed)
107(W) 106(H) 215(D) mm
(4.2(W) 4.2(H) 8.5(D) in.)
1.6 kg (3.5 lb.)
*This product is protected against electrostatic discharge.
*Specifications and design subject to change without notice.
1
Solder diameters
The solder diameters that can be used with
the HAKKO 374 are shown in the table below.
Certain parts may need to be changed to
accommodate the desired diameter. See
“Changing the solder diameter” on page 4 for
details. Up to 1-kg bobbins of solder can be used.
CAUTION
1.6 mm dia. lead free solder is not available for use.
Soldering irons
Soldering iron
HAKKO 900M
(used with HAKKO 926, 927, and 928)
HAKKO 900L
(used with HAKKO 926, 927, and 928)
HAKKO 902
(used with HAKKO 931 and 932)
HAKKO 904 (used with HAKKO 929)
HAKKO Dash
HAKKO Mach-I
HAKKO 907 (used with 936 and 937)
HAKKO 908 (used with 936 and 937)
Comments
Only when foot-
switch is used.
HAKKO FM-2027（used with HAKKO FM-202/203/204/205)
HAKKO FM-2028 (used with HAKKO FX-950/951/952)
HAKKO FX-8801（used with HAKKO FX-888D/889)
HAKKO FX-8805（used with HAKKO FX-888D/889)
HAKKO 912 (Long nipple)
HAKKO FX-8301 (used with HAKKO FX-838)
HAKKO FM-2030 (used with HAKKO FM-206)

2
PART NAMES
Feed controller unit
Mode switch
Switch jack Feed speed control knob
Feed unit cover
Arm
Following
pulley asse’y
Driving
pulley asse’y
Driving pulley shaftFollowing gear shaft
Return length adjusting knob
Solder
bobbin shaft
Driving pulley
Driving pulley set screw
Supply nozzle
Following pulley
Arm support shaft
Arm
Stopper
Tension adjusting screw
Arm mounting screw
Feed nozzle
connection hole
Feed nozzle
set screw
Motor mounting
plate
Following pulley set screw
Cutting blade
'AA
Feed time control knob
Power switch
A
A'
PARTS LIST
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Part No.
B2132
B2104
B2105
B2106
B2107
B2108
B2109
B2110
B2111
B2112
B2113
A1323
B1890
B2133
B2134
B2135
B2136
B2137
B2129
B2142
B2130
B1901
B1902
B1899
B1197
B1905
B1041
B1134
B1907
B1139
B5131
B1906
B1487
B2604
B2131
B1208
B1895
B1037
B1114
B1169
B1900
B1912
Part Name
Cover for feeding unit
Driving pulley asse'y /
for ø0.6mm (0.02 in.) solder
Driving pulley asse'y /
for ø0.8mm (0.03 in.) solder
Driving pulley asse'y /
for ø1.0mm (0.04 in.) solder
Driving pulley asse'y /
for ø1.2mm (0.05 in.) solder
Driving pulley asse'y /
for ø1.6mm (0.06 in.)solder
Following pulley asse'y /
for ø0.6mm (0.02 in.) solder
Following pulley asse'y /
for ø0.8mm (0.03 in.) solder
Following pulley asse'y /
for ø1.0mm (0.04 in.) solder
Following pulley asse'y /
for ø1.2mm (0.05 in.) solder
Following pulley asse'y /
for ø1.6mm (0.06 in.) solder
Cutting blade
Nozzle support
Supply nozzle /
for ø0.6mm (0.02 in.) solder
Supply nozzle /
for ø0.8mm (0.03 in.) solder
Supply nozzle /
for ø1.0mm (0.04 in.) solder
Supply nozzle /
for ø1.2mm (0.05 in.) solder
Supply nozzle /
for ø1.6mm (0.06 in.) solder
Motor fixing plate
Motor
Cover
Solder bobbin shaft
Solder bobbin support
P.W.B.
Potentiometer for feed speed control
Potentiometer for feed time control
Fuse holder
Fuse holder S
Fuse
Fuse
Mini jack
Switch
Power switch
Power switch
Chassis
Cord stopper
Chassis support plate
Rubber stopper
Locking spacer
Power cord
Transformer
Transformer
Description
With cutting blade
With cutting blade
With cutting blade
With cutting blade
With cutting blade
With wire, connector
With potentiometer
5k
1k
Without fuse, 100, 110V
Without fuse, 220, 230V
125V-1A/100, 110V
250V-1A S /220, 230V
100 - 120V
220 - 240V
Set of 4
Set of 4
3 core & European
plug
100V
240V
1
23
6
5
5
7
8
4
Pan head screw
M4 6
Pan head
screw
M3 10
Pan head
screw
M3 10
Pan head
screw
M3 6
Pan head screw
M4 16
Pan head screw
M3 4 (4)
Hexagon socket
head cap screw
M3 15
Wa
v
wa
s
(no
m
siz
e
Nut
M
Widt
h
acro
s
flat
5
Flat head screw
M4 8
Nut M8 P0.75
Nut
M8 P0.75
Nut
M4 No.3
Pan head
screw
M3 6 Pan head
screw with washer
M3 5 (with spring
washer) (4)
Spring
washer
(nominal
size 3)
Spring
washer
(nominal
size 3) (4)
Spring
washer
(nominal
size 3)
Hexagon
socket
set screw
M3 3
Internal tooth
lock washer
(nominal size 4)
Flat head screw
M4 8
9

Diameter
of solder
0.6~1.0mm
(0.02~0.04 in.)
1.2~1.6mm (373)
(0.05~0.06 in.)
1.2mm (374)
(0.05 in)
0.6mm (374)
(0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
0.6mm
(0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (373)
(0.06 in.)
1.6mm (374)
(0.06 in.)
Part
No.
B3563
B3564
B3565
B1674
B1675
B1676
B1677
B2119
B1679
B1680
B1681
B1682
B2120
B1684
B1685
B1686
B1687
B2121
B1689
B1690
B1691
B1692
B2122
B1694
B1695
B1696
B1697
B2123
B2146
B2147
B2148
B2149
B2156
B2151
B2152
B2153
B2154
B2157
B3481
B3482
B3483
B3484
B3566
B3567
B3568
B3569
B3570
B3571
Part Name
Tube unit R/with Switch
Tube unit S/with Switch
Tube unit T/with Switch
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Applicable
Models
FX-8301
900M, N452
N453
900L, N454
920, 921, 922
918
902, 904
907, FX-8801
908, FX-8805
FM-2027,
FM-2028, 912
FX-8301
Diameter
of solder
Part
No. Part Name Applicable Models
-
Driving pulley assembly
Following pulley assembly
Supply nozzle
Guide pipe assembly
Tube unit
Change these parts as necessary.
The 900M and 900L are soldering irons used with the HAKKO 926,
HAKKO 927, and HAKKO 928.
The 902 is a soldering iron used with the HAKKO 931 and the
HAKKO 932.
The 904 is a soldering iron used with the HAKKO 929.
The 907 and 908 are solder irons used with the HAKKO 936 and
the HAKKO 937.
918, 920, 921, and 922 are product numbers from the HAKKO
Mach Iseries. Parts that support the entire series are indicated
by MACH.
N452, N453, and N454 are product numbers from the HAKKO
Dash series. Parts that support the entire series are indicated by
Dash.
The following parts may need to be changed in order to
accommodate a change in the solder diameter or type of
soldering iron used.
8
OPTIONS AND REPLACEMENT PARTS
ASSEMBLY (IRON SIDE)
Make sure the selected guide pipe assembly or tube unit matches the soldering iron and solder diameter to be used.
(1) Attaching the guide pipe
assembly
The guide pipe assembly is attached between the
nipple (or nut) and the handle. Depending on the
type of soldering iron, a washer may be necessary.
See the gures below.
CAUTION
To avoid injury, do not attempt to assemble while the
soldering iron is hot.
Do not damage the guide pipe by bending or twisting it.
Do not allow the tube to be bent at a severe angle.
Otherwise, it will become clogged with solder.
Guide pipe assembly
Nozzle
Handle
Wave washer (No.B2684)
Nut
Stopper
Nipple
Nut
918 - No.B2685
920
921 No.B2686
922
(
)
(2) Attaching the tube unit
Attachment
Tube
Feed switch Secure with clips
Joint
Guide pipe support plate
Guide pipe locking nut
Guide pipe
Nozzle
(a) Attach the guide pipe assembly to the tube. The
tube is double structure. Insert the inner tube into
the joint and pass the outer tube over the outside
of the joint so that it covers the threaded portion.
Do not bend the tube.
(b) Attach the attachment to the soldering iron
Note) The attachment is not necessary when using the
HAKKO Mach
I.
1. Decide from which side of the attachment you will
pass the tube. Then, position the attachment so that
the tube connects to the guide pipe as straight as
possible.
The tube can be passed through either the left or
the right side of the attachment. When changing the
tube, be careful not to damage the internal wiring.
2. Secure the attachment with the handle and the
adhesive tape on the rear of the attachment.
Refer to the gure above and be sure to attach the
attachment and the guide pipe at the correct angle.
HAKKO 900
HAKKO Dash
HAKKO 907 and 908
(FX-8801 and FX-8805)
HAKKO 902 and 904
HAKKO Mach I
Rear view of attachment
3
HAKKO FM-2027
HAKKO FM-2028
HAKKO 912
HAKKO FX-8301
Please insert the guide pipe assembly directly in the tube
unit, and tighten lightly with a hex wrench (M3).
HAKKO FM-2027
HAKKO FM-2028
HAKKO 912
HAKKO FX-8301
Others
Guide pipe asse’y
Guide pipe asse’y
Guide pipe asse’y
Guide pipe asse’y
Wave washer
Stopper
Stopper
Spring iron holder A
Spring iron holder B
Foot switch
Clip A / 1pc.
Clip B / 1pc.
Clip C / 1pc.
Clip D / 1pc.
Clip E / 1pc.
Retaining clip
HAKKO 631
Iron holder
HAKKO 936/937
Iron holder
HAKKO 936/937
Iron hlder
Mini plug
Iron receptacle
Feeder pen
Feeder pen
Feeder switch
Hose coupling band /5 bands
B3726
B3727
B3728
B3729
B2684
B2685
B2686
B1647
B1648
B1649
B1650
B1956
B2158
B3487
B3488
B3489
631-07
C1141
C1142
B1863
B1805
C1234
C1235
B2124
B1290
FM-2030
902, 904
918
920, 921, 922
926
927, 928, 929,
931, 932
-
900M, 900L,
DASH
902, 904
907, 908, FX-8301
FX-8801, FX-8805
FM-2027,FM-2028
FM-2030
912
FH-100,
FH-200
DASH, MACH
900S
907, 908, 913,
914
-
-
-
-
-
-
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.6~1.0mm
(0.02~0.04 in.)
1.2~1.6mm
(0.05~0.06 in.)
-
-
HAKKO FM-2030
HAKKO FM-2030

ASSEMBLY (FEED CONTROLLER UNIT)
Driving pulley set screw
Feed nozzle
set screw
Feed nozzle
connection
hole
Solder
bobbin
shaft
Arm mounting
screw
Tension adjusting
screw
Stopper
Arm
Arm support shaft
Following
pulley
set screw
Following pulley
Supply
nozzle
(1) Connect the feed nozzle
Insert the feed nozzle into the feed nozzle
connection hole and tighten the set screw. Do not
tighten the set screw excessively or you may crack
the tube.
(2) Connect the mini plug
Insert the mini plug into the jack on the front of the
station. When use the Mach-I, insert the footswitch
plug into the jack on the front of the station.
(3) Setting the solder
If there is any solder in the tube, remove it before
installing the new solder.
(a) Pass the solder bobbin shaft through the solder
bobbin and attach the shaft to the rear of the
station. As shown below, attach the shaft so that
the solder is fed from the top of the bobbin.
(b) Pass the solder through the supply nozzle.
(c) Turn the power switch ON and set the mode
to MANUAL .
(d) While pressing the feed switch (or footswitch),
the solder is fed through the feed nozzle.
(e) While pressing the feed switch (or footswitch),
insert the tip of the solder between the driving
pulley and the following pulley.
(4) Changing the solder
diameter
The following parts may need to be changed in order
to accommodate a change in the solder diameter or
type of soldering iron used.
Driving pulley assembly
Following pulley assembly
Supply nozzle
Guide pipe assembly
Tube unit
Change these parts as necessary according to the
procedure below.
CAUTION
The position of the stopper was set at the factory before
shipping. Do not move the stopper.
(a) Turn the power OFF. Loosen the tension
adjusting screw and the arm mounting screw,
open the arm, and remove any solder remaining
in the tube.
(b) Remove the arm support shaft and remove the
arm assembly.
(c) Remove the following pulley set screws (two: top
and bottom) and change the following pulley.
(d) Remove the driving pulley set screw and change
the driving pulley.
NOTE) Install both the top and bottom oil-less washers
so that the black side of each is facing upward.
(See parts list.)
(e) Adjust so that the gears mesh properly and
tighten the tension adjusting screw until the
stopper screw touches the left end of the notch
(screw hole) in the motor mounting plate.
(f) Tighten the arm mounting screw.
(5) Vertical mounting
The Hakko 374 can be mounted vertically.
Mount as shown in the gure.
46 mm
(1.8 in.)
2-ø4.2 mm
(0.08-ø0.17 in.)
4
OPTIONS AND REPLACEMENT PARTS
Assembly
(1) Connecting to the main unit
Feeder pen
Feed nozzle
Feed nozzle
set screw
Hakko 374 unit
1. Make sure the feeder pen matches the solder
diameter to be used.
2. Insert the feed nozzle into the feed nozzle
connection hole on the feed controller unit.
3. Tighten the feed nozzle set screw.
(2) Mounting the feeder switch
(Part number: B2124)
The feeder switch is a hand-operated switch
designed especially for used with the feeder pens.
Solder is fed when the feed button is pressed.
Feed button Feeder switch
Mount so that the tip
comes to here.
Feeder pen
Mini plug
Switch jack
1. Attach the feeder switch securely to the handle of
the feeder pen with adhesive tape on the back of
the feeder switch.
2. Insert the mini plug into the switch jack on the
Hakko 374 unit.
* The feeder pen can also be used with a foot-
switch instead of the feeder switch.
7
Diameter
of solder
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
Part
No.
B1631
B1672
B2125
B1632
B1673
B2126
B1957
B1958
B2127
B2143
B2144
B2145
B3477
B3478
B3479
B3480
Part Name
Tube unit A/with Switch
Tube unit B/with Switch
Tube unit G/with Switch
Tube unit C
Tube unit D
Tube unit H
Tube unit E/with Switch
Tube unit F/with Switch
Tube unit I/with Switch
Tube unit J/with Switch
Tube unit K/with Switch
Tube unit L/with Switch
Tube unit M/with Switch
Tube unit N/with Switch
Tube unit P/with Switch
Tube unit Q/with Switch
Applicable
Models
900M, 900L
DASH
MACH
902, 904
907, 908,
FX-8801,
FX-8805
FM-2027,
FM-2028,
912
Diameter
of solder
0.6mm (0.02 in)
0.8mm (0.03 in)
1.0mm (0.04 in)
1.2mm (0.05 in)
1.6mm (0.06 in)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
Part
No.
B1699
B1700
B1701
B1702
B1703
B1704
B1705
B2116
B1706
B1707
B2117
B1708
B1709
B2118
B3485
B3486
Part Name
Nozzle
Nozzle
Nozzle
Nozzle
Nozzle
Guide pipe A
Guide pipe B
Guide pipe G
Guide pipe C
Guide pipe D
Guide pipe H
Guide pipe E
Guide pipe F
Guide pipe I
Guide pipe J
Guide pipe K
Applicable
Models
-
900M, 920
921, 922
N452, N453
907
900L, 918,
N454,
908
902, 904
FM-2027,
FM-2028, 912
FM-2030

MAINTENANCE
CAUTION: The cutting blade is sharp. Be very careful
when handling the cutting blade.
Keep the cutting blade, driving pulley, and following pulley clean of
solder and ux using a brush or other suitable cleaning device. If the
solder is not being cut properly or the unit is generating solder balls
even though the unit is well maintained, the cutting blade may be worn.
Follow the procedure below to change the cutting blade.
Replacing the cutting blade
1. Follow steps (a) through (c) under “Changing
the solder diameter” on page 4 and remove the
following pulley assembly.
2. Use a 14-mm wrench and a pair of C-ring pliers (or
other pliers with a tip-size of about 2 mm 0.08 in.)
to disassemble the following pulley assembly.
Pliers
Following pulley assembly
Wrench
Turn counterclockwise
3. Remove the cutting blade from between the top
and bottom pieces of the following pulley.
If the cutting blade is dif cult to remove due
to accumulated ux and solder, push a pin
downward through the four holes on the top piece
and pry the pieces apart.
4. Clean any accumulated ux or solder off each
part.
5. Assemble in the reverse order of disassembly.
Following pulley
top piece
Following pulley
bottom piece
Following gear
Cutting blade
Nut
6
OPTIONAL FEEDER PEN
Thread solder can be fed automatically by connecting the optional feeder
pen to the HAKKO 374 feed controller unit. The feeder pen can be used for
the following purposes.
The feeder pen can be used for conventional
soldering where the soldering iron is held in one
hand and the pen is held in the other to supply the
solder.
The feeder pen can be xed in a certain position
to supply solder to a substrate automatically.
Part No.
C1234
C1235
B2124
Part name
Feeder Pen, for solder diameters
from 0.6 to 1.0 mm (0.02 to 0.04 in.)
Feeder Pen, for solder diameters
from 1.2 to 1.6 mm (0.05 to 0.06 in.)
Feeder Switch
(switch designed for the feeder pens)
OPERATION
To feed the solder, simply press the feed switch (or foot-switch). Details are explained below.
(1) Mode
AUTO MODE
In AUTO MODE, the solder is fed at the speci ed
speed for the speci ed amount of time regardless of
how long the feed switch is pressed.
MANUAL MODE
In MANUAL MODE, while pressing the switch the
solder is fed at the speci ed speed.
(2) Setting the feed time and
feed speed
Set the feed rate before setting the feed time. The
feed speed setting is effective in both AUTO and
MANUAL modes. The feed time is only effective in
AUTO mode.
(3) Adjusting the return length
A speci ed length of solder can be retracted after
the solder has been fed. This function is necessary
when the HAKKO 374 is used with an automatic
soldering machine.
The return length setting range is 0 to 5 mm (0 to
0.2 in.). However, the solder will be wound back onto
the bobbin if the return length is set to be longer
than the feed length. Keep the return length setting
as short as possible. Also, set the return length so
that the tip of the solder stops short of the tip of the
nozzle. Otherwise, the ux will tend to accumulate in
the nozzle.
There is a hole on the side of unit which leads to the
return length adjusting screw. Insert a screwdriver
into this hole and turn the screw to adjust the return
length.
(4) Using the iron holder
CAUTION
Attach the iron receptacle so that the tip of the
soldering iron and the guide pipe are parallel.
HAKKO 926
Attach the iron holder for the HAKKO 926 as shown
in the figure at the top of the next column. (In the case
of the HAKKO 926, the holder can only be attached
on the left toward the front of the unit.)
Iron receptacle
Spring iron holder
OR
Mounting
knob Iron holder
fitting
Cover mounting
plate
HAKKO 900, 902, 904
When attaching soldering units other than the
HAKKO 926 to the HAKKO 631, all you have to do is to
change the spring iron holder.
HAKKO Dash and HAKKO Mach I
Use the HAKKO 631 (product number: 631-07).
HAKKO 907 and 908 (FX-8801/8805)
Use the iron holder made for the HAKKO 907 and
908. Place the handpiece on the holder so that the
right side of the holder and the right side of the guide
pipe support plate are aligned as shown below. To
align with the left side, remove the guide pipe locking
nut and the joint and install the guide pipe support
plate so that it is on the left side.
Iron holder for the FM-2027, FM-2028, FM-2030,
FX-8301, 912
Replace the spring holder with the spring holder
included in the set before placing the iron in the iron
holder.
Remove Insert
5

MAINTENANCE
CAUTION: The cutting blade is sharp. Be very careful
when handling the cutting blade.
Keep the cutting blade, driving pulley, and following pulley clean of
solder and ux using a brush or other suitable cleaning device. If the
solder is not being cut properly or the unit is generating solder balls
even though the unit is well maintained, the cutting blade may be worn.
Follow the procedure below to change the cutting blade.
Replacing the cutting blade
1. Follow steps (a) through (c) under “Changing
the solder diameter” on page 4 and remove the
following pulley assembly.
2. Use a 14-mm wrench and a pair of C-ring pliers (or
other pliers with a tip-size of about 2 mm 0.08 in.)
to disassemble the following pulley assembly.
Pliers
Following pulley assembly
Wrench
Turn counterclockwise
3. Remove the cutting blade from between the top
and bottom pieces of the following pulley.
If the cutting blade is dif cult to remove due
to accumulated ux and solder, push a pin
downward through the four holes on the top piece
and pry the pieces apart.
4. Clean any accumulated ux or solder off each
part.
5. Assemble in the reverse order of disassembly.
Following pulley
top piece
Following pulley
bottom piece
Following gear
Cutting blade
Nut
6
OPTIONAL FEEDER PEN
Thread solder can be fed automatically by connecting the optional feeder
pen to the HAKKO 374 feed controller unit. The feeder pen can be used for
the following purposes.
The feeder pen can be used for conventional
soldering where the soldering iron is held in one
hand and the pen is held in the other to supply the
solder.
The feeder pen can be xed in a certain position
to supply solder to a substrate automatically.
Part No.
C1234
C1235
B2124
Part name
Feeder Pen, for solder diameters
from 0.6 to 1.0 mm (0.02 to 0.04 in.)
Feeder Pen, for solder diameters
from 1.2 to 1.6 mm (0.05 to 0.06 in.)
Feeder Switch
(switch designed for the feeder pens)
OPERATION
To feed the solder, simply press the feed switch (or foot-switch). Details are explained below.
(1) Mode
AUTO MODE
In AUTO MODE, the solder is fed at the speci ed
speed for the speci ed amount of time regardless of
how long the feed switch is pressed.
MANUAL MODE
In MANUAL MODE, while pressing the switch the
solder is fed at the speci ed speed.
(2) Setting the feed time and
feed speed
Set the feed rate before setting the feed time. The
feed speed setting is effective in both AUTO and
MANUAL modes. The feed time is only effective in
AUTO mode.
(3) Adjusting the return length
A speci ed length of solder can be retracted after
the solder has been fed. This function is necessary
when the HAKKO 374 is used with an automatic
soldering machine.
The return length setting range is 0 to 5 mm (0 to
0.2 in.). However, the solder will be wound back onto
the bobbin if the return length is set to be longer
than the feed length. Keep the return length setting
as short as possible. Also, set the return length so
that the tip of the solder stops short of the tip of the
nozzle. Otherwise, the ux will tend to accumulate in
the nozzle.
There is a hole on the side of unit which leads to the
return length adjusting screw. Insert a screwdriver
into this hole and turn the screw to adjust the return
length.
(4) Using the iron holder
CAUTION
Attach the iron receptacle so that the tip of the
soldering iron and the guide pipe are parallel.
HAKKO 926
Attach the iron holder for the HAKKO 926 as shown
in the figure at the top of the next column. (In the case
of the HAKKO 926, the holder can only be attached
on the left toward the front of the unit.)
Iron receptacle
Spring iron holder
OR
Mounting
knob Iron holder
fitting
Cover mounting
plate
HAKKO 900, 902, 904
When attaching soldering units other than the
HAKKO 926 to the HAKKO 631, all you have to do is to
change the spring iron holder.
HAKKO Dash and HAKKO Mach I
Use the HAKKO 631 (product number: 631-07).
HAKKO 907 and 908 (FX-8801/8805)
Use the iron holder made for the HAKKO 907 and
908. Place the handpiece on the holder so that the
right side of the holder and the right side of the guide
pipe support plate are aligned as shown below. To
align with the left side, remove the guide pipe locking
nut and the joint and install the guide pipe support
plate so that it is on the left side.
Iron holder for the FM-2027, FM-2028, FM-2030,
FX-8301, 912
Replace the spring holder with the spring holder
included in the set before placing the iron in the iron
holder.
Remove Insert
5

ASSEMBLY (FEED CONTROLLER UNIT)
Driving pulley set screw
Feed nozzle
set screw
Feed nozzle
connection
hole
Solder
bobbin
shaft
Arm mounting
screw
Tension adjusting
screw
Stopper
Arm
Arm support shaft
Following
pulley
set screw
Following pulley
Supply
nozzle
(1) Connect the feed nozzle
Insert the feed nozzle into the feed nozzle
connection hole and tighten the set screw. Do not
tighten the set screw excessively or you may crack
the tube.
(2) Connect the mini plug
Insert the mini plug into the jack on the front of the
station. When use the Mach-I, insert the footswitch
plug into the jack on the front of the station.
(3) Setting the solder
If there is any solder in the tube, remove it before
installing the new solder.
(a) Pass the solder bobbin shaft through the solder
bobbin and attach the shaft to the rear of the
station. As shown below, attach the shaft so that
the solder is fed from the top of the bobbin.
(b) Pass the solder through the supply nozzle.
(c) Turn the power switch ON and set the mode
to MANUAL .
(d) While pressing the feed switch (or footswitch),
the solder is fed through the feed nozzle.
(e) While pressing the feed switch (or footswitch),
insert the tip of the solder between the driving
pulley and the following pulley.
(4) Changing the solder
diameter
The following parts may need to be changed in order
to accommodate a change in the solder diameter or
type of soldering iron used.
Driving pulley assembly
Following pulley assembly
Supply nozzle
Guide pipe assembly
Tube unit
Change these parts as necessary according to the
procedure below.
CAUTION
The position of the stopper was set at the factory before
shipping. Do not move the stopper.
(a) Turn the power OFF. Loosen the tension
adjusting screw and the arm mounting screw,
open the arm, and remove any solder remaining
in the tube.
(b) Remove the arm support shaft and remove the
arm assembly.
(c) Remove the following pulley set screws (two: top
and bottom) and change the following pulley.
(d) Remove the driving pulley set screw and change
the driving pulley.
NOTE) Install both the top and bottom oil-less washers
so that the black side of each is facing upward.
(See parts list.)
(e) Adjust so that the gears mesh properly and
tighten the tension adjusting screw until the
stopper screw touches the left end of the notch
(screw hole) in the motor mounting plate.
(f) Tighten the arm mounting screw.
(5) Vertical mounting
The Hakko 374 can be mounted vertically.
Mount as shown in the gure.
46 mm
(1.8 in.)
2-ø4.2 mm
(0.08-ø0.17 in.)
4
OPTIONS AND REPLACEMENT PARTS
Assembly
(1) Connecting to the main unit
Feeder pen
Feed nozzle
Feed nozzle
set screw
Hakko 374 unit
1. Make sure the feeder pen matches the solder
diameter to be used.
2. Insert the feed nozzle into the feed nozzle
connection hole on the feed controller unit.
3. Tighten the feed nozzle set screw.
(2) Mounting the feeder switch
(Part number: B2124)
The feeder switch is a hand-operated switch
designed especially for used with the feeder pens.
Solder is fed when the feed button is pressed.
Feed button Feeder switch
Mount so that the tip
comes to here.
Feeder pen
Mini plug
Switch jack
1. Attach the feeder switch securely to the handle of
the feeder pen with adhesive tape on the back of
the feeder switch.
2. Insert the mini plug into the switch jack on the
Hakko 374 unit.
* The feeder pen can also be used with a foot-
switch instead of the feeder switch.
7
Diameter
of solder
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
Part
No.
B1631
B1672
B2125
B1632
B1673
B2126
B1957
B1958
B2127
B2143
B2144
B2145
B3477
B3478
B3479
B3480
Part Name
Tube unit A/with Switch
Tube unit B/with Switch
Tube unit G/with Switch
Tube unit C
Tube unit D
Tube unit H
Tube unit E/with Switch
Tube unit F/with Switch
Tube unit I/with Switch
Tube unit J/with Switch
Tube unit K/with Switch
Tube unit L/with Switch
Tube unit M/with Switch
Tube unit N/with Switch
Tube unit P/with Switch
Tube unit Q/with Switch
Applicable
Models
900M, 900L
DASH
MACH
902, 904
907, 908,
FX-8801,
FX-8805
FM-2027,
FM-2028,
912
Diameter
of solder
0.6mm (0.02 in)
0.8mm (0.03 in)
1.0mm (0.04 in)
1.2mm (0.05 in)
1.6mm (0.06 in)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6~1.0mm
(0.02~0.04 in.)
1.2mm (0.05 in.)
Part
No.
B1699
B1700
B1701
B1702
B1703
B1704
B1705
B2116
B1706
B1707
B2117
B1708
B1709
B2118
B3485
B3486
Part Name
Nozzle
Nozzle
Nozzle
Nozzle
Nozzle
Guide pipe A
Guide pipe B
Guide pipe G
Guide pipe C
Guide pipe D
Guide pipe H
Guide pipe E
Guide pipe F
Guide pipe I
Guide pipe J
Guide pipe K
Applicable
Models
-
900M, 920
921, 922
N452, N453
907, FX-8801
900L, 918,
N454,
908, FX-8805
902, 904
FM-2027,
FM-2028, 912
FM-2030

Diameter
of solder
0.6~1.0mm
(0.02~0.04 in.)
1.2~1.6mm (373)
(0.05~0.06 in.)
1.2mm (374)
(0.05 in)
0.6mm (374)
(0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (0.06 in.)
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
0.6mm
(0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
1.6mm (373)
(0.06 in.)
1.6mm (374)
(0.06 in.)
Part
No.
B3563
B3564
B3565
B1674
B1675
B1676
B1677
B2119
B1679
B1680
B1681
B1682
B2120
B1684
B1685
B1686
B1687
B2121
B1689
B1690
B1691
B1692
B2122
B1694
B1695
B1696
B1697
B2123
B2146
B2147
B2148
B2149
B2156
B2151
B2152
B2153
B2154
B2157
B3481
B3482
B3483
B3484
B3566
B3567
B3568
B3569
B3570
B3571
Part Name
Tube unit R/with Switch
Tube unit S/with Switch
Tube unit T/with Switch
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Guide pipe asse'y
Applicable
Models
FX-8301
900M, N452
N453
900L, N454
920, 921, 922
918
902, 904
907, FX-8801
908, FX-8805
FM-2027,
FM-2028, 912
FX-8301
Diameter
of solder
Part
No. Part Name Applicable Models
-
Driving pulley assembly
Following pulley assembly
Supply nozzle
Guide pipe assembly
Tube unit
Change these parts as necessary.
The 900M and 900L are soldering irons used with the HAKKO 926,
HAKKO 927, and HAKKO 928.
The 902 is a soldering iron used with the HAKKO 931 and the
HAKKO 932.
The 904 is a soldering iron used with the HAKKO 929.
The 907 and 908 are solder irons used with the HAKKO 936 and
the HAKKO 937.
918, 920, 921, and 922 are product numbers from the HAKKO
Mach Iseries. Parts that support the entire series are indicated
by MACH.
N452, N453, and N454 are product numbers from the HAKKO
Dash series. Parts that support the entire series are indicated by
Dash.
The following parts may need to be changed in order to
accommodate a change in the solder diameter or type of
soldering iron used.
8
OPTIONS AND REPLACEMENT PARTS
ASSEMBLY (IRON SIDE)
Make sure the selected guide pipe assembly or tube unit matches the soldering iron and solder diameter to be used.
(1) Attaching the guide pipe
assembly
The guide pipe assembly is attached between the
nipple (or nut) and the handle. Depending on the
type of soldering iron, a washer may be necessary.
See the gures below.
CAUTION
To avoid injury, do not attempt to assemble while the
soldering iron is hot.
Do not damage the guide pipe by bending or twisting it.
Do not allow the tube to be bent at a severe angle.
Otherwise, it will become clogged with solder.
Guide pipe assembly
Nozzle
Handle
Wave washer (No.B2684)
Nut
Stopper
Nipple
Nut
918 - No.B2685
920
921 No.B2686
922
(
)
(2) Attaching the tube unit
Attachment
Tube
Feed switch Secure with clips
Joint
Guide pipe support plate
Guide pipe locking nut
Guide pipe
Nozzle
(a) Attach the guide pipe assembly to the tube. The
tube is double structure. Insert the inner tube into
the joint and pass the outer tube over the outside
of the joint so that it covers the threaded portion.
Do not bend the tube.
(b) Attach the attachment to the soldering iron
Note) The attachment is not necessary when using the
HAKKO Mach
I.
1. Decide from which side of the attachment you will
pass the tube. Then, position the attachment so that
the tube connects to the guide pipe as straight as
possible.
The tube can be passed through either the left or
the right side of the attachment. When changing the
tube, be careful not to damage the internal wiring.
2. Secure the attachment with the handle and the
adhesive tape on the rear of the attachment.
Refer to the gure above and be sure to attach the
attachment and the guide pipe at the correct angle.
HAKKO 900
HAKKO Dash
HAKKO 907 and 908
(FX-8801 and FX-8805)
HAKKO 902 and 904
HAKKO Mach I
Rear view of attachment
3
HAKKO FM-2027
HAKKO FM-2028
HAKKO 912
HAKKO FX-8301
Please insert the guide pipe assembly directly in the tube
unit, and tighten lightly with a hex wrench (M3).
HAKKO FM-2027
HAKKO FM-2028
HAKKO 912
HAKKO FX-8301
Others
Guide pipe asse’y
Guide pipe asse’y
Guide pipe asse’y
Guide pipe asse’y
Wave washer
Stopper
Stopper
Spring iron holder A
Spring iron holder B
Foot switch
Clip A / 1pc.
Clip B / 1pc.
Clip C / 1pc.
Clip D / 1pc.
Clip E / 1pc.
Retaining clip
HAKKO 631
Iron holder
HAKKO 936/937
Iron holder
HAKKO 936/937
Iron hlder
Mini plug
Iron receptacle
Feeder pen
Feeder pen
Feeder switch
Hose coupling band /5 bands
B3726
B3727
B3728
B3729
B2684
B2685
B2686
B1647
B1648
B1649
B1650
B1956
B2158
B3487
B3488
B3489
631-07
C1141
C1142
B1863
B1805
C1234
C1235
B2124
B1290
FM-2030
902, 904
918
920, 921, 922
926
927, 928, 929,
931, 932
-
900M, 900L,
DASH
902, 904
907, 908, FX-8301
FX-8801, FX-8805
FM-2027,FM-2028
FM-2030
912
FH-100,
FH-200
DASH, MACH
900S
907, 908, 913,
914
-
-
-
-
-
-
0.6mm (0.02 in.)
0.8mm (0.03 in.)
1.0mm (0.04 in.)
1.2mm (0.05 in.)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.6~1.0mm
(0.02~0.04 in.)
1.2~1.6mm
(0.05~0.06 in.)
-
-
HAKKO FM-2030
HAKKO FM-2030

2
PART NAMES
Feed controller unit
Mode switch
Switch jack Feed speed control knob
Feed unit cover
Arm
Following
pulley asse’y
Driving
pulley asse’y
Driving pulley shaftFollowing gear shaft
Return length adjusting knob
Solder
bobbin shaft
Driving pulley
Driving pulley set screw
Supply nozzle
Following pulley
Arm support shaft
Arm
Stopper
Tension adjusting screw
Arm mounting screw
Feed nozzle
connection hole
Feed nozzle
set screw
Motor mounting
plate
Following pulley set screw
Cutting blade
'AA
Feed time control knob
Power switch
A
A'
PARTS LIST
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Part No.
B2132
B2104
B2105
B2106
B2107
B2108
B2109
B2110
B2111
B2112
B2113
A1323
B1890
B2133
B2134
B2135
B2136
B2137
B2129
B2142
B2130
B1901
B1902
B1899
B1197
B1905
B1041
B1134
B1907
B1139
B5131
B1906
B1487
B2604
B2131
B1208
B1895
B1037
B1114
B1169
B1900
B1912
Part Name
Cover for feeding unit
Driving pulley asse'y /
for ø0.6mm (0.02 in.) solder
Driving pulley asse'y /
for ø0.8mm (0.03 in.) solder
Driving pulley asse'y /
for ø1.0mm (0.04 in.) solder
Driving pulley asse'y /
for ø1.2mm (0.05 in.) solder
Driving pulley asse'y /
for ø1.6mm (0.06 in.)solder
Following pulley asse'y /
for ø0.6mm (0.02 in.) solder
Following pulley asse'y /
for ø0.8mm (0.03 in.) solder
Following pulley asse'y /
for ø1.0mm (0.04 in.) solder
Following pulley asse'y /
for ø1.2mm (0.05 in.) solder
Following pulley asse'y /
for ø1.6mm (0.06 in.) solder
Cutting blade
Nozzle support
Supply nozzle /
for ø0.6mm (0.02 in.) solder
Supply nozzle /
for ø0.8mm (0.03 in.) solder
Supply nozzle /
for ø1.0mm (0.04 in.) solder
Supply nozzle /
for ø1.2mm (0.05 in.) solder
Supply nozzle /
for ø1.6mm (0.06 in.) solder
Motor fixing plate
Motor
Cover
Solder bobbin shaft
Solder bobbin support
P.W.B.
Potentiometer for feed speed control
Potentiometer for feed time control
Fuse holder
Fuse holder S
Fuse
Fuse
Mini jack
Switch
Power switch
Power switch
Chassis
Cord stopper
Chassis support plate
Rubber stopper
Locking spacer
Power cord
Transformer
Transformer
Description
With cutting blade
With cutting blade
With cutting blade
With cutting blade
With cutting blade
With wire, connector
With potentiometer
5k
1k
Without fuse, 100, 110V
Without fuse, 220, 230V
125V-1A/100, 110V
250V-1A S /220, 230V
100 - 120V
220 - 240V
Set of 4
Set of 4
3 core & European
plug
100V
240V
1
23
6
5
5
7
8
4
Pan head screw
M4 6
Pan head
screw
M3 10
Pan head
screw
M3 10
Pan head
screw
M3 6
Pan head screw
M4 16
Pan head screw
M3 4 (4)
Hexagon socket
head cap screw
M3 15
Wa
v
wa
s
(no
m
siz
e
Nut
M
Widt
h
acro
s
flat
5
Flat head screw
M4 8
Nut M8 P0.75
Nut
M8 P0.75
Nut
M4 No.3
Pan head
screw
M3 6 Pan head
screw with washer
M3 5 (with spring
washer) (4)
Spring
washer
(nominal
size 3)
Spring
washer
(nominal
size 3) (4)
Spring
washer
(nominal
size 3)
Hexagon
socket
set screw
M3 3
Internal tooth
lock washer
(nominal size 4)
Flat head screw
M4 8
9

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
ve
sher
minal
e 8)
M3
h
ss
5.5
Nut P0.75 2t (2)
External
tooth washer
(nominal
size 4)
Pan head screw
with washer
M4 5
(with spring
washer)
Pan head screw
with washer
M3 6 (with spring,
plain washer) (2)
Pan head
screw
M3 4 (8)
Pan head screw
with washer
M4 5 (with spring
washer) (2)
Pan head screw with washer
M3 5 (with spring washer) (4)
10
Note: Spare or repair parts do not include mounting screws, if they are
not listed on the description. Screws must be ordered separately.
SAFETY INSTRUCTIONS
To avoid injury, do not attempt to assemble
while the soldering iron is hot.
The cutting plate is sharp. Be careful not to
cut your ngers.
When resin core solder that has been cut
is not used, the properties of the resin ( ux)
may deteriorate with time.
Once the solder has been cut and is inside
the guide pipe, the heat from the soldering
iron may accelerate the deterioration of the
resin ( ux). Use solder that is inside the guide
pipe as soon as possible.
Do not damage the guide pipe by bending or
twisting it.
Do not allow the tube to be bent at a severe
angle. Otherwise, it will become clogged with
solder.
Keep the cutting blade, driving pulley, and
following pulley clean of solder and ux using
a brush or other suitable cleaning device.
The switch input is no-voltage input. Do not
apply voltage to the switch jack.
Periodically remove the nozzle and clean off
any accumulated ux.
Do not damage the return length adjustment
knob by turning it with excessive force.
This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities,
or lack of experience and knowledge,
unless they have been given supervision or
instruction concerning use of the appliance
by a person responsible for their safety.
Children should be supervised to ensure that
they do not play with the appliance.
SPECIFICATIONS
Power consumption
Motor rating
Solder diameter
Solder feed time
Solder feed speed
Solder feed quantity
Solder return quantity
Outer dimensions
Weight
6 W
24V DC, 3.2 W
0.6, 0.8, 1.0, 1.2, 1.6 mm
(0.02, 0.03, 0.04, 0.05, 0.06 in.)
0 to 7 sec.
4.5 to 26 mm/sec.
(0.18 to 1.02 in./sec.)
0 to 182 mm
(0 to 7.17 in.)
0 to 5 mm
(0 to 0.2 in.) (fixed speed)
107(W) 106(H) 215(D) mm
(4.2(W) 4.2(H) 8.5(D) in.)
1.6 kg (3.5 lb.)
*This product is protected against electrostatic discharge.
*Specifications and design subject to change without notice.
1
Solder diameters
The solder diameters that can be used with
the HAKKO 374 are shown in the table below.
Certain parts may need to be changed to
accommodate the desired diameter. See
“Changing the solder diameter” on page 4 for
details. Up to 1-kg bobbins of solder can be used.
CAUTION
1.6 mm dia. lead free solder is not available for use.
Soldering irons
Soldering iron
HAKKO 900M
(used with HAKKO 926, 927, and 928)
HAKKO 900L
(used with HAKKO 926, 927, and 928)
HAKKO 902
(used with HAKKO 931 and 932)
HAKKO 904 (used with HAKKO 929)
HAKKO Dash
HAKKO Mach-I
HAKKO 907 (used with 936 and 937)
HAKKO 908 (used with 936 and 937)
Comments
Only when foot-
switch is used.
HAKKO FM-2027（used with HAKKO FM-202/203/204/205)
HAKKO FM-2028 (used with HAKKO FX-950/951/952)
HAKKO FX-8801（used with HAKKO FX-888D/889)
HAKKO FX-8805（used with HAKKO FX-888D/889)
HAKKO 912 (Long nipple)
HAKKO FX-8301 (used with HAKKO FX-838)
HAKKO FM-2030 (used with HAKKO FM-206)

Thank you for purchasing the Hakko 374 Self Feeder.
Please read this manual carefully before operating the Hakko
374. Store the manual in a safe, easily accessible place for
future reference.
TABLE OF CONTENTS
SAFETY INSTRUCTIONS / SPECIFICATIONS............................... 1
PART NAMES (FEED CONTROLLER UNIT) .................................. 2
ASSEMBLY (IRON SIDE) ................................................................ 3
ASSEMBLY (FEED CONTROLLER UNIT) ...................................... 4
OPERATION .................................................................................... 5
MAINTENANCE / OPTIONAL FEEDER PEN .................................. 6
OPTIONAL FEEDER PEN / OPTIONS AND REPLACEMENT PARTS ...... 7
OPTIONS AND REPLACEMENT PARTS........................................ 8
PARTS LIST............................................................................... 9, 10
TROUBLESHOOTING ................................................................... 11
FEEDER WITH
SOLDER CUTTING FUNCTION
TROUBLESHOOTING
When the Hakko 374 fails to feed the solder properly, check the following items.
Do the parts match the solder diameter?
Is the tension adjusted properly?
Is the tube bent or twisted?
Have solder and ux accumulated on the
driving pulley, the following pulley, and the
cutting blade?
Is the tension adjustment screw tight?
Is the arm mounting screw tight?
Is the guide pipe clogged with ux?
Is the tip of the nozzle clogged with ux?
Is the mini plug connected properly?
Is the fuse blown?
Is the power supply of the correct voltage
and frequency?
Are the feed speed and the feed time
appropriate?
Is the tip temperature appropriate?
2016.1
MA00519XZ160128
11
CAUTION
This product includes such features as electrically conductive plastic parts and grounding of the
handpiece and station as measures to protect the device to be soldered from the effects of static
electricity. Be sure to observe the following instructions:
1. The handle and other plastic parts are not insulators, they are conductors. When replacing parts or
repairing, take sufficient care not to expose live electrical parts or damage insulation materials.
2. Be sure to ground the unit during use.
© 2000-2016 HAKKO Corporation. All Rights Reserved.
OVERSEAS AFFILIATES
U.S.A.: AMERICAN HAKKO PRODUCTS, INC.
TEL: [phone] FAX: [phone]
Toll Free (800)88-HAKKO
4 2 5 5 6
http://www.hakkousa.com
HONG KONG: HAKKO DEVELOPMENT CO., LTD.
TEL: [phone] FAX: [phone]
http://www.hakko.com.hk
E-mail:[email protected]
SINGAPORE: HAKKO PRODUCTS PTE., LTD.
TEL: [phone] FAX: [phone]
http://www.hakko.com.sg
E-mail:[email protected]
Please access to the following address for the other Sales affiliates.
http://www.hakko.com
HEAD OFFICE
4-5, Shiokusa 2-chome, Naniwa-ku, Osaka 556-0024 JAPAN
TEL:[phone] FAX:[phone]
http://www.hakko.com E-mail:[email protected]