Makita DBN600 Operating instructions

March 2018
Ver.1
OFFICIAL USE
for ASC & Sales Shop
CORDLESS BRAD NAILER
DBN600
REPAIR MANUAL

OFFICIAL USE
for ASC & Sales Shop
2 / 41
1CONTENTS
1 CONTENTS.................................................................................................................................................................................2
2 CAUTION....................................................................................................................................................................................3
3 NECESSARY REPAIRING TOOLS...........................................................................................................................................3
4 LUBRICANTANDADHESIVEAPPLICATION......................................................................................................................4
5 TIGHTENING TORQUE SPECIFICATIONS............................................................................................................................4
6 REPAIR........................................................................................................................................................................................6
6-1 Magazine section..................................................................................................................................................................6
6-1-1 Disassembling.............................................................................................................................................................6
6-1-2 Assembling..................................................................................................................................................................9
6-2 Armature and Gear assembly.............................................................................................................................................12
6-2-1 Disassembling...........................................................................................................................................................12
6-2-2 Assembling................................................................................................................................................................15
6-3 Crank section, Main piston section and Driver..................................................................................................................20
6-3-1 Disassembling...........................................................................................................................................................20
6-3-2 Assembling................................................................................................................................................................25
6-4 Door section.......................................................................................................................................................................31
6-4-1 Disassembling...........................................................................................................................................................31
6-4-2 Assembling................................................................................................................................................................32
6-5 Arm section, Contact top, Driver guide .............................................................................................................................34
6-5-1 Disassembling...........................................................................................................................................................34
6-5-2 Assembling................................................................................................................................................................37
6-6 Pusher section ....................................................................................................................................................................37
6-6-1 Disassembling...........................................................................................................................................................37
6-7 Door section.......................................................................................................................................................................37
6-7-1 Assembling................................................................................................................................................................37
7 CIRCUIT DIAGRAM................................................................................................................................................................38
8 WIRING DIAGRAM.................................................................................................................................................................40

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2CAUTION
Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
Follow the instructions described below in advance before repairing:
Wear gloves.
In order to avoid wrong reassembly, draw or write down where and how the parts are assembled, and what the parts are.
It is also recommended to have boxes ready to keep disassembled parts by group.
Handle the disassembled parts carefully. Clean and wash them properly.
3NECESSARYREPAIRINGTOOLS
Code No.
Description Use for
1R026 Bearing setting pipe 16-8.2 removing/ assembling Latch
1R041 Vise plate removing/ assembling Crank
1R219 Torque wrench shaft 7-23N.m assembling Crank
1R220 Ratchet head 9.5 (for 1R219) use with 1R219
1R222 Socket adapter (for 1R219) use with 1R220
1R258 V block removing/ assembling Spur gear 44
1R267 Spring extractor M2.5 removing/ assembling Spur gear 44
1R268 Spring extractor M3 fixing Pusher lever and removing/ assembling Latch
1R291 Retaining ring S and R pliers removing Retaining ring R-28

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4LUBRICANTANDADHESIVEAPPLICATION
Description Amount
Isoflex NB52 Alittle if not indicated
5TIGHTENINGTORQUE SPECIFICATIONS
2g
1g
[1]

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No.
Parts to fasten Fastener Tightening torque (N･m)
Quantity
1 Top cap

Main cylinder M5x18 Hex socket
head bolt 4.5 – 6.5 *1 4
2 Top cap

Stem holder M4x12 Hex socket
head bolt 2.7 – 4.2 2
3 Shaft

Crank Shaft 15 – 18 1
4 Housing R

Housing L M5x8 Pan head screw
1.2 – 1.8 1
5 Driver guide

Magazine M4x12 Hex socket
head bolt 1.0 – 1.8 *2 2
6 Driver guide

Crank case M5x25 Hex socket
head bolt 5.0 – 7.5 2
7 Top cap

Spring bracket
M5x12 Hex bolt 5.0 – 7.0 *2 2
8Adjuster shaft

Hex nut M8 Adjuster shaft 7.5 – 9.5 1
9 Crank case

Main cylinder M4x28Hex socket
head bolt 3.0 – 4.2 *2 4
10
Adjuster base

Crank case M4x16 Pan head
screw 1.0 – 1.8 1
11
Gear assembly

Crank case M4x16 Hex socket
head bolt 1.0 – 1.8 4
12
Button

Pusher 3x8 Tapping screw 0.6 – 0.9 1
13
Magazine

Magazine end 3x16 Tapping screw 1.0 – 1.7 2
*1Apply a little of Loctite 243.
*2Apply a little of Loctite 272.

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6REPAIR
Note: Be sure to remove battery and Nails before reparing.
6-1 Magazine section
6-1-1 Disassembling
Fig. 1
1
11
1 Remove an M5x28 Pan head screw [2] and 3x16Tapping screws [3] (12 pcs) from Housing L[1]. Then remove
Housing R [4].
Fig. 2
2
22
2 Open [2] Latch cover [1]. Remove M5x25 Hex socket head bolts [4] (2 pcs) from Crank case [3]. Remove[6]
Door section [5].
[4]
[1]
[3]
[5]
[5]
[4]
[1]
[3]
[2]
[6]
[3]
[2]
[4]
[4]
[3]
[2]
[1]

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Fig. 3
3
33
3 Compress [3] Compression spring 9 [2] using Slotted screwdriver [1]. Remove Compression spring 9 [2] from
Adjuster base [4].
Fig. 4
4
44
4 Remove [6] the bent portion ofArm [4] fromAdjuster base [5] while lifting up [3] Driver guide [1] by turning [2]
it. Remove [9]Arm section [8] from Stem holder [7]. Remove Driver guide and Magazine [10].
[2]
[1]
[4]
[3]
[5]
[6]
[7]
[8]
[10]
[9]
[1]
[4]
[2]
[4]
[2]
[3]
[5]

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Fig. 5
5
55
5 Remove M4x12 Hex socket head bolts [4] (2 pcs) and Sleeves 4 [5] (2 pcs) from Driver guide [3] by supporting
[2] Pusher lever [1]. Remove [7] Driver guide section [3] from Magazine section [6].
・Guide plate [8]
Note
Be sure not to lose Sleeve 4 [5].
Fig. 6
6
66
6 Remove [3] Pusher lever section [2] from
Magazine section [1]. Remove Nail rail [4].
・ Stopper [5]
・ Pin 5 [6]
・ Spiral spring [7]
[5]
[1]
[2]
[4]
[6]
[7]
[4]
[3]
[1]
[2]
[4､5]
[6]
[3]
[8]
[7]
[3]
[4]
[5]

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Fig. 7
7
77
7 Remove 3x16Tapping screws [2] (2 pcs) from
Magazine [1]. Remove Magazine end [3] and End
plate [4].
6-1-2 Assembling
1
11
1 Reverse the procedure. (6-1-1)
Fig. 8
2
22
2 Insert [3] Stopper [1] into Pusherlever portion [2] if
Stopper [1] is disengaged.
Fig. 9
3
33
3 Insert [3] Pin 5 [2] in Spiral spring [1]. Insert [5]
Spiral spring [1] in the groove of Pusher lever [4].
[1]
[2]
[1]
[4]
[3]
[5]
[1]
[4]
[2]
[1]
[2]
[1]
[3]
[1]
[2]
[3]
[4]
[1]
[2]

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Fig. 10
4
44
4 Set [4] to Magazine [3] by supporting [2] Spiral
spring [1] so that Spiral spring [1] does not come
off.
Fig. 11
5
55
5 Set [8] the protrusion of Pusher lever [6] in the groove of Magazine end [7] while setting [5] Pusher [3] in the
groove of Magazine [4] by pushing [2] Button [1].
6
66
6 Push down [10] Pusher lever [6] to the position that U groove of Magazine [9] reveals. Fix Pusher lever [6] by
inserting [11] 1R268.
Fig. 12
[3]
[4]
[5]
[3]
[6]
[7]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[6]
1R268
[10]
[11]
[1]
[2]
[3]
[4]
[1]
[3]

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7
77
7 Set [5] the groove of Nail rail [3] in Pusher [4] while pushing [2] Button [1] of (Fig. 11) and aligning the cutout
portion of Nail rail [3] to the arrowed direction. Set [7] the edge of Nail rail [3] to the groove of End plate [6].
Fig. 13
8
88
8 Insert [5] Driver guide [3] in Magazine [4] while
pushing [2] Magazine end [1].
Fig. 14
9
99
9 Insert [3] Guide plate [1] in the groove of Driver
guide [2].
Fig. 15
10
1010
10 Put Loctite 272 on M4x12 Hex socket head bolts
[1] (2 pcs) a little bit.Tighten M4x12 Hex socket
head bolts [1] (2pcs) while being sure to set Sleeve
4 [2] (2 pcs). Fix Driver guide [3] and Contact top
[4] and pull out [5] 1R268.
[3]
[4]
2
[1]
1R268
[5]
[3]
[4]
[1]
[2]
[3]
[1]
[2]
[1]
[2]
[3]
[4]
[5]

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Fig. 16
11
1111
11 Set to Housing so that the bent portion ofArm [1]
comes closer to the Trigger side [3] than Leaf
spring [2].
Fig. 17
12
1212
12 Facing the flat sides of Driver [1] to the door side
[2],and applying the side surface of Driver guide
[3] to the side surface of Crank case [4], tighten
M5x25 Hex socket head bolts [5] (2 pcs).
6-2 Armature and Gear assembly
6-2-1 Disassembling
1
11
1 Remove Housing R, Driver guide and Magazine. (6-1-1).
Fig. 18
2
22
2 Remove Motor section [2] and Main cylinder section [3] from Housing L [1].
[2]
[1]
[3]
[1]
[2]
[3]
[5]
[3]
[4]
[1]
[2]
[2]
[3]
[1]

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Fig. 19
3
33
3 Remove M4x16 Hex socket head bolts [2] (4 pcs) fromCrank case [1]. Remove [6] Flatwasher 23 [3], Gear
assembly [4] and Motor housing [5].
Note
Be sure not to lose Flat washer 23 [3].
Fig. 20
4
44
4 Remove [3] Leaf spring [2] from Motor housing [1].
Fig. 21
5
55
5 Remove [4] Plates [3] (2 pcs) from Motor housing [1] and Gear assembly [2].
[1]
[2]
[1]
[2]
[3]
[4]
[3]
[1]
[1]
[2]
[2]
[3]
[5]
[4]
[1]
[1]
[3]
[4]
[2]
[6]
[2]
[5]

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Fig. 22
6
66
6 Remove [3] Gear assembly [2] from Motor housing [1].
Fig. 23
7
77
7 Remove 3x16Tapping screws [2] (4 pcs) from
Motor housing L [1]. Remove Motor housing R [3].
Fig. 24
8
88
8 RemoveArmature [2] from Motor housing L[1].
[1]
[2]
[2]
[1]
[2]
[3]
[1]
[2]
[3]
[3]
[1]
[2]
[2]
[1]

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Fig. 25
9
99
9 Hook [3] Torsion spring [1] to the groove of Brush
holder [2]. Float [6] Carbon brush [5].
Tips
Hold the illustrated parts [4] so thatTorsion spring [1]
does not come off.
Fig. 26
10
1010
10 Pull out [4]Armature [1] andYork unit [2] from
Brush holder [3].
Fig. 27
11
1111
11 Applying the gear side ofArmature [1] on work
bench, and pushing down [3] York unit [2], and pull
out [4]Armature [1].
6-2-2 Assembling
1Reverse the procedure (6-2-1).
[3]
[2]
[1]
[4]
[1]
[2]
[3]
[3]
[1]
[2]
[4]
[1]
[4]
[2]
[3]
[5]
[6]

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Fig. 28
2Facing the cutout portion ofYork unit [1] to the
gear side ofArmature [2], assemble them.
Fig. 29
3AssembleArmature [1] andYork unit [2] to Brush
holder [3].
Fig. 30
4Set Torsion spring [2] that ishooked to the groove
of Brush holder side [1] to the initial position [3].
Hold [5] Carbon brush [4].
Tips
Hold the illustrated portion [6] so thatTorsion spring
[2] does not come off.
[3]
[1]
[2]
[2]
[6]
[1]
[3]
[4]
[5]
[1]
[2]

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Fig. 31
5Assemble byfacing the cutout portion of York unit [1] to the protrusion of Motor housing L [2].
Tips
・ Be sure that the flat surface of Brush holder [4] is fit vertically when viewed from arrow side [3].
・ Be sure that the sides ofYork unit [5] are fit inside of the rib of Motor housing L [6].
・ Be sure that the sides of Brush holder [7] are fit inside of the rib of Motor housing L[8].
Fig. 32
6When you assembleArmature section [2] to Gear
assembly [1], once faceArmature gear to Gear
assembly, and pushArmature section [2] to Gear
assembly [1] after checking they are engaged.
[2]
[1]
[4]
[3]
[5]
[6]
[7]
[8]
[1]
[2]

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Fig. 33
7Align Plate [1] and Gear assembly [2] as shown.
Align the other sideofPlate [1] to the groove of
Motor housing [3].
8Opposite side can bedone in the same way.
Fig. 34
9Set [3] Leaf spring [1] to Motor housing [2].
Tips
Leaf spring [1] can be assembled in either direction.
[3]
[2]
[1]
[1]
[2]
[2]
[1]
[1]
[2]
[3]

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Fig. 35
10 Assemble Flat washer23 [2] to Gear assembly [1]. Set Gear assembly [1] by aligning [5] the hexagonal part [4]
of Shaft [4] to the hexagonal part [3] of Gear assembly [1]. Setting the protrusion [6] of Gear assembly [1],
tighten with M4x16 Hex socket head bolts [7] (4 pcs) applied a little bit of Loctite 272.
Note
Be sure that Plate [8] does not protrude from the
concave of the edge [9] of Gear assembly [1].
[4]
[3]
[6]
[5]
[1]
[7]
[6]
[8]
[9]
[2]
[1]
[1]

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6-3 Crank section, Main piston section and Driver
6-3-1 Disassembling
1Remove Housing R, Driver guide and Magazine. (6-1-1)
2Remove Gear assemblyand Motor housing. (6-2-1)
Fig. 36
3Remove M5x12 Hex bolts [2] (2 pcs) fromTop cap [1]. Remove [6] Spring bracket [3], Rear cushion [4] and
Compression spring 15 [5].
Note
When you remove M5x12 Hex bolts [2] (2 pcs), be sure to press [7] Spring bracket [3] because
Compression spring 15 [5] pops up.
Fig. 37
4Remove M5x18 Hex socket head bolts [2] (4 pcs) from Main cylinder [2]. Remove [8] Top cap [6], Stem holder
[4] and Head valve [7] by tapping [5] Stem holder [4] with Plastic hammer [3].
[1]
[2]
[3]
[4]
[8]
[7]
[6]
[5]
[4]
[2]
[3]
[1]
[2]
[1]
[3]
[4]
[5]
[6]
[7]
[2]