Makita DTD170 Manual

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Model No.
Description Cordless Impact Driver
DTD170
CONCEPT AND MAIN APPLICATIONS
Model DTD170 is our high-end Cordless impact driver powered
by 18V Li-ion battery and developed based on
the current model DTD148.
The main features and benefits are:
• More compact body (overall length: 117mm) than DTD148
• Electronic 4 stage impact power selection
•A mode [assist mode]
• Ergonomically designed handle with better control
Specifications
Model
Specifications DTD170
Battery
Voltage: V 18
Capacity: Ah 1.5, 2.0, 3.0, 4.0, 5.0, 6.0
Energy capacity: Wh 27, 36, 54, 72, 90, 108
Cell Li-ion
Charging time (approx): min 15, 24, 22, 36, 45, 55 with DC18RC
Max output (W) 290
Driving shank: mm (") 6.35 (1/4) Hex
Capacities
Machine screw M4 - M8 (5/32 - 5/16")
Standard bolt M5 - M16 (3/16 - 5/8")
High strength bolt M5 - M14 (3/16 - 9/16")
Coarse-thread 22 - 125mm (7/8 - 4-7/8")
Impact power selection Electronic 4 stage (Max/ Hard/ Medium/ Soft)
+ Teks screw mode + A mode [assist mode]
Impacts per min: min-1=ipm Max/ Hard/ Medium/ Soft 0 - 3,800/ 3,600/ 2,600/ 1,100
No load speed: min-1=rpm Max/ Hard/ Medium/ Soft 0 - 3,600/ 3,200/ 2,100/ 1,100
Max tightening torque*3: N·m [kgf·cm] (in·lbs) 175 [1,780] (1,550)
Electric brake Yes
Variable speed control by trigger Yes
Reverse switch Yes
LED job light Yes
Weight according to
EPTA-Procedure 01/ver.2.1: kg(lbs) 1.2 (2.7)*1or 1.5 (3.3)*2
*3 Tightening torque at 3 seconds after seating, when tightening M16 (grade 10.9) high strength bolt
Dimensions: mm ( " )
Length (L) 117 (4-5/8)
Width (W) 79 (3-1/8)
Height (H) 218 (8-5/8)*1
236 (9-1/4)*2
*1 With Battery BL1815N, BL1820(B)
*2 With Battery BL1830(B), BL1840(B), BL1850(B),
BL1860B
Belt clip
Battery*5
Battery cover*6
Charger*5
Plastic carrying case*5
*5 Battery, charger and plastic carrying case are not supplied with “Z” model.
*6 Supplied with the same quantity of extra Battery.
Note: The standard equipment may vary by country or model variation.
Phillips bits
Socket bits
Drill chucks
Drill bits with 6.35mm Hex shank
Bit piece
Stopper for impact driver
Hook set (Belt clip)
Tool catcher set
Battery protectors
Li-ion batteries:
BL1815N, BL1820(B),
BL1830(B), BL1840(B),
BL1850(B), BL1860B
Fast charger DC18RC
Two port multi fast charger DC18RD
Charger DC18SD/DC24SC
Four port multi charger DC18SF
Automotive charger DC18SE
Standard equipment
Optional accessories
H
W
L
July 2016
TECHNICAL INFORMATION
OFFICIAL USE
for ASC & Sales Shop

1INDEX
1INDEX.......................................................................................................................................................................................... 2
2CAUTION .................................................................................................................................................................................... 3
3NECESSARY REPAIRING TOOLS ........................................................................................................................................... 3
4LUBRICANT AND ADHESIVE APPLICATION ...................................................................................................................... 3
5REPAIR ........................................................................................................................................................................................ 4
5-1 Rotor, Hammer case complete ............................................................................................................................................. 4
5-1-1 Disassembling ............................................................................................................................................................. 4
5-1-2 Assembling.................................................................................................................................................................. 7
5-2 Rotor, Switch, Controller, Stator .......................................................................................................................................... 9
5-2-1 Disassembling ............................................................................................................................................................. 9
5-2-2 Assembling.................................................................................................................................................................. 9
5-3 Anvil N .............................................................................................................................................................................. 11
5-3-1 Disassembling ........................................................................................................................................................... 11
5-3-2 Assembling................................................................................................................................................................ 11
5-4 Hammer section ................................................................................................................................................................. 12
5-4-1 Disassembling ........................................................................................................................................................... 12
5-4-2 Assembling................................................................................................................................................................ 13
6Circuit diagram ........................................................................................................................................................................... 14
6-1 How to disassemble Stator ................................................................................................................................................. 14
7Wiring diagram ........................................................................................................................................................................... 15
8Troubleshooting .......................................................................................................................................................................... 17
8-1 Note in Repairing ............................................................................................................................................................... 17
8-2 Test for recognizing the short-circuit of FET (Field Effect Transistor) on controller ......................................................... 17
8-3 Flowchart of Troubleshooting............................................................................................................................................ 18
9TIGHTENING TORQUE SPECIFICATIONS .......................................................................................................................... 19
2 / 19

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 are the parts.
It is also recommended to have boxes ready to keep disassembled parts by group.
· Handle the disassembled parts carefully. Clean and wash them properly.
3NECESSARY REPAIRING TOOLS
Code No.
Description
Use for
1R003
Retaining ring S pliers ST-2N
removing Ring spring 11
1R016
1/4" Hex shank bit M6
removing Rotor
1R040
Armature holder 50 set for use with Vise
removing / assembling Hammer case complete
1R045
Gear extractor (large)
disassembling Hammer section
1R212-A
Tip for retaining ring pliers
use with 1R003
1R212-B
Plate set (with screws)
1R223
Torque wrench shaft 20-90N·m
assembling Hammer case complete
1R224
Ratchet head 12.7
use with 1R223
1R232
Pipe 30
removing Bit sleeve
1R263
Bearing extractor
removing Rotor
1R288
Screwdriver magnetizer
removing Steel balls
1R402-A
Digital tester
diagnosing Controller
- Socket 30-78
use with 1R223 and Nut spinner handle in order to remove/
assemble Hammer case complete
-
Socket 32-50
removing/ assembling Hammer case complete
-
Nut spinner handle (Square drive: 12.7 mm)
removing Hammer case complete
4LUBRICANT AND ADHESIVE APPLICATION
Apply the following lubricants and adhesives.
Lubricant
Amount
Makita grease FA. No.2
a little
Mixture of Makita Grease FA No.2 (90%) and
Molybdenum disulfide (10%)
a little
Fig. 4-1
Flat washer 24
Hole on Anvil
Contact surface
with Steel ball 3.5
Gear portion: 2g
Surface of Anvil
Inner groove on
Hammer
Drum portion on
Spindle
3 / 19

5REPAIR
5-1 Rotor, Hammer case complete
5-1-1 Disassembling
Fig. 5-1-1-3
[3] Remove 1R016 from the machine, and remove eight Bind PT 3x16 Tapping screws, and then remove Housing R.
Fig. 5-1-1-1
[1] Remove two Bind PT 3x16 Tapping screws, and remove Rear cover.
Fig. 5-1-1-2
[2] Mount 1R016 to the machine, and fix it with Vise.
Remove Rotor by prying it off with two 1R263.
Rear cover
1R016
Rotor
1R263
1R263
Vise
Bind PT 3x16 Tapping
screw (2 pcs.)
Bind PT 3x16
Tapping screw
(8 pcs.)
Housing R
4 / 19

Fig. 5-1-1-6
[6] Remove Hammer case cover from Hammer case complete by releasing the claws of Hammer case cover from the
projections of Hammer case complete.
Note: To remove Hammer case cover, Hammer case complete must be removed from Housing L in advance.
Fig. 5-1-1-5
[5] Remove Bumper with a small slotted screwdriver.
Fig. 5-1-1-4
[4] Remove Hammer case complete from Housing L.
Hammer case
complete
Housing L
Bumper
Hammer case
cover
The projection of
Hammer case
complete
5 / 19

Fig. 5-1-1-8
[8] Loosen Hammer case complete by turning it
counterclockwise with Socket 30-78 and Nut spinner
handle.
Fig. 5-1-1-7
[7] Fix Socket 32-50 with Vise and two 1R040, and set
Bearing box complete to Socket 32-50.
Socket
30-78
Nut spinner
handle
Hammer case
complete
Fig. 5-1-1-9
[9] Hammer case complete section can be disassembled as shown below.
Bearing box
complete
O ring 40
Internal gear
51
Hammer
section
Hammer case
complete
1R040
1R040
Socket
32-50
Bearing box
complete
6 / 19

5-1-2 Assembling
[1] Assemble by reversing the disassembly procedure.
Fig. 5-1-2-1
[2] Assemble Hammer case complete section as shown below.
Note:
· Do not fail to set O ring 40 in place.
· Note the orientation of Internal gear 51.
Fig. 5-1-2-3
[4] Set the tightening torque of 1R223 to 45N·m~55N·m
(460kgf·cm~560kgf·cm), then turn Bearing box
complete counterclockwise with 1R224 and Socket
30-78.
Fig. 5-1-2-2
[3] Fix Socket 32-50 with Vise and two 1R040, and set
Bearing box complete to Socket 32-50.
Projection
Thin washer 15
Note: Be careful
not to lose it.
Internal gear 51
O ring 40
Bearing box
complete
Hammer section
Hammer case
complete section
Apply lubricant VG100 a
little on the inner
circumference of Hammer
case complete to prevent
galling.
Align the grooves of Hammer case
complete section with the projections of
Internal gear 51.
1R040
1R040
Socket
32-50
Bearing box
complete
1R223
1R224
Socket
30-78
7 / 19

Fig. 5-1-2-8
[9] Insert Rotor into Stator.
Note:
· Be careful not to pinch your fingers between Fan and Housing because Rotor has strong magnetic force.
· Once Rotor has been inserted, do not force it into Stator any further or you will break Controller print board.
Fig. 5-1-2-5
[6] Assemble Bumper to Hammer case cover while
aligning each groove.
Fig. 5-1-2-4
[5] Assemble Hammer case cover to Hammer case
complete as shown below.
U-shape notch
Stopper portion
Projection
Hammer case
cover
Groove on
Bumper
Groove on Hammer
case cover
Fig. 5-1-2-7
[8] Assemble Housing R to Housing L with eight
Bind PT 3x16 Tapping screws.
Fig. 5-1-2-6
[7] Assemble Hammer case complete to Housing L by aligning
the projection on Hammer case complete and claw on
Hammer case cover with the grooves on Housing L.
Bind PT 3x16 Tapping
screws (8 pcs.)
Rotor
Stator
Fan
Housing
Projection on Hammer
case complete
Claw on Hammer
case cover
Groove on
Housing L
Groove on
Housing L
8 / 19

5-2 R o t or, Switch, Controller, Stator
5-2-1 Disassembling
[1] Remove Rotor, and remove Housing R. (5-1-1 Disassembling)
[2] Remove Switch, Controller and Stator.
5-2-2 Assembling
[1] Assemble by reversing the disassembly procedure.
[2] Be careful to check the points mentioned in Fig. 5-2-2-1, Fig. 5-2-2-2.
Caution for Handling of Rotor
When handling or storing multiple Rotors, be sure to keep a proper distance between Rotors as shown in Fig. 5-2-2-1.
Because Rotor has strong magnetic force, failure to follow this instruction could result in:
· Finger injury caused by pinching between Rotors pulling each other
· Magnetic loss of Rotors or damage on the magnet portion of Rotor (Fig. 5-2-2-2)
Fig. 5-2-2-1
Fig. 5-1-2-9
[10] Assemble Rear cover to Housing set with two Bind PT
3x16 Tapping screws.
Bind PT 3x16 Tapping
screw (2 pcs.)
Rear cover
Fig. 5-2-2-2
9 / 19

[6] Insert Rotor into Stator, and assemble Rear cover to Housing set.
Fig. 5-2-2-3
[3] Assemble Stator to Housing L by aligning the grooves on
Stator with the projections on Housing L.
Fig. 5-2-2-4
[4] Make sure that Stator is properly assembled to
Housing L.
Fig. 5-2-2-5
[5] Set the convex portion of Switch to the concave portion of F/R Change lever.
Housing L
Stator
Stator
Housing L
Grooves on Stator
Projections on
Housing L
Switch
F/R Change
lever
Convex portion of
Switch
Concave portion of
F/R Change lever
10 / 19

5-3 Anvil N
5-3-1 Disassembling
[1] Remove Hammer case complete from Housing L. (5-1-1 Disassembling)
5-3-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 5-3-1-1
[2] Use 1R232 for holding Anvil N firmly for
easy removal of Ring spring 11.
Fig. 5-3-1-2
[3] Remove Ring spring 11 while checking the following points.
· Press the top of Bit sleeve with a thumb so as not to pop out
Compression spring 13.
· Expand the end gap of Ring spring 11 with 1R003, 1R212-B and
1R212-A.
1R232
Hammer case
complete
Ring spring 11
1R212-B
1R212-A
Fig. 5-3-1-3
[4] Bit sleeve section can be disassembled as shown below.
Flat washer 12
Compression
spring 13
Steel ball 3.5
Ring spring 11
Bit sleeve
Anvil N
Steel ball 3.5
1R003
11 / 19

5-4 Hammer section
5-4-1 Disassembling
[1] Remove Hammer case complete from Housing L. (5-1-1 Disassembling)
Fig. 5-4-1-1
[2] Set 1R045 to Hammer as shown below.
Fig. 5-4-1-2
[3] Pull Hammer downward by turning 1R045.
[4] Align the opening for Steel ball insertion* with the top of Cam
grooving on Spindle by turning 1R045.
[5] Remove two Steel balls 5.6 with Tweezers or Magnetic
screwdriver.
[6] Turn 1R045 clockwise to release Hammer case section.
1R045
Hammer
Spindle
Tweezers
Top of Cam
grooving on
Spindle
Steel balls 5.6
(2 pcs.)
1R045
Opening for
Steel ball
insertion*
Fig. 5-4-1-3
[7] When removing Spindle from Hammer, place Hammer
downward so that Steel balls 3.5 do not fall down.
Hammer
Spindle
Hammer
12 / 19

5-4-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 5-4-2-1
Note in Assembling:
Before assembling Steel balls 3.5, check the following points:
· Twenty-four Steel balls 3.5 are put in the groove of Hammer as shown below.
· There is a gap equivalent to the size of one Steel ball 3.5.
Steel balls 3.5
(24 pcs.)
Hammer
Gap equivalent to the size of one Steel ball 3.5
13 / 19

6Circuit diagram
6-1 How to disassemble Stator
Fig. 6-1
Terminal
Tape
Controller
Fuse
Main switch
Red or White/AW G 1 8
Flag receptacle
with lock
(#250, t=0.8mm)
LED circuit
Vinyl tube
Connector
Connector
Polyolefin tube
Tape
Stator
Red/AW G 18
Polyolefin tube
Yellow/AW G22
Black/AW G18
+
AS
Flag receptacle
with lock
(#187, t=0.8mm)
Sensor board
[1] Remove Sensor board from Stator by
removing three PT 2x6 Tapping screws
with No.1 Phillips screwdriver.
[2] Remove three M3x6 Flat head
screws with No.1 Phillips
screwdriver.
[3] Remove Terminal unit with a
slotted screwdriver by
releasing the hook.
Terminal unit
M3x6 Flat head screw (3 pcs.)
Sensor board
PT 2x6 Tapping
screw (3 pcs.)
－
AWG: American wire gauge
White/AWG18
Blue/AWG18
Orange/AWG18
Black
White
Red
White
Yellow
Blue
Red
Black
White
Blue
Yellow
Gray
14 / 19

7Wiring diagram
Fig. 7-1
With attention to “Points for routing Lead wires”, put the lead wires of
LED circuit between the projection of Hammer case complete and the
rib B, also between Hammer case complete and F/R Change lever.
A
A
B
B
Wiring around Hammer case complete
Projection of Hammer case complete
Hammer case complete
Boss
LED circuit
Rib A
Rib B
F/R Change lever
Cross section
of A
Projection of Hammer case complete
Hammer case
complete
Area 1
Area 2
[2] Do not put the lead wires of LED circuit on Area 1
and 2 (between the Rib C and Hammer case
complete).
[1] Do not put the lead wires of LED circuit on this area
(between the projection on Hammer case complete
and Housing).
Cross section
of B
Lead wires
Lead wires
Rib C
Put the lead wires of LED
circuit between the rib A
and the boss.
Points for routing Lead wires
15 / 19

Fig. 7-2
Wiring on Housing set
Stator
Do not put the lead wires on
Switch.
Pass the lead wires of Stator
and LED circuit between the
rib D and rib E.
Rib E
Rib D
Switch
LED circuit
Controller
Terminal
Do not put any Lead wires on
these Ribs.
Put the controller lead wire
(black) from Terminal in this
lead wire holder.
16 / 19

8Troubleshooting
Whenever you find any trouble in your machine, first, refer to this list to check the machine for solution.
8-1 Note in Repairing
(1) Use the full charged battery which has the star mark.
(2) When Housing is disassembled, check the conditions of the electrical parts (Connectors, Lead wires, Switches, etc.), Rotor,
Stator, Gear section, etc.
(3) Do the running test in Soft mode (when the trigger is being pulled just a little) to check the following functions by repeating
10 times;
•F/R change lever •Switch plate •Variable speed control trigger
8-2 Test for recognizing the short-circuit of FET (Field Effect Transistor) on controller
Trouble on Controller can be checked with Tester as follows.
Fig. 8-2-1
[1] Set Digital tester (1R402-A) in the Diode mode.
Fig. 8-2-2
[2] First, remove the battery.
Contact Black probe (a) with (+) Terminal (b).
Contact Red probe (c) with (-) Terminal (d).
Wait until the figure on Tester gets stable.
Note: Be careful not to reverse them. The reversed contacts
could spoil the test.
[3] Controller is in order if Tester indicates 0.7V ~ 0.9V. If Tester indicates 0 V~0.4 V approx., Controller is broken. Replace it
with a new one.
(a)
(b)
(d)
(c)
17 / 19

8-3 Flowchart of Troubleshooting
Check the items from the top of the following list. (Description of the item is referred to Circuit diagram in Fig. 6-1.)
After corrective action, return to the start of Troubleshooting and re-check again.
Symptom
Cause
Corrective action
No
Controller is broken.
Replace Controller.
Does Tester indicate 0.7V ~ 0.9V?
When tester cannot be prepared, go to “Yes”.
Yes
The machine
works properly.
Yes
No
Controller is broken.
Replace Controller.
No
Connectors are in
incomplete connection.
Replace Controller.
Rotation speed
can be changed.
Forward/ Reverse
rotation are OK.
Lead wires are broken.
Check Lead wires, or
replace them.
Switch is broken.
Replace Switch.
No
Connectors are in
incomplete connection.
Replace Controller.
LED job light are
on.
Lead wires are broken.
Check Lead wires, or
replace them.
LED circuit is broken.
Replace LED circuit.
Switch is broken.
Replace Switch.
Yes
Yes
Switch is broken.
Replace Switch.
Terminal is broken.
Check Terminal, or replace
it.
Controller is broken.
Replace Controller.
No
No
Connectors are in
incomplete connection.
Replace Controller.
LED job light are
on.
Lead wires are broken.
Check Lead wires, or
replace them.
Switch is broken.
Replace Switch.
LED circuit is broken.
Replace LED circuit.
Controller is broken.
Replace Controller.
Rotor is broken.
Replace Rotor.
Stator is broken.
Replace Stator.
No
Yes
Rotor is rubbed to
Stator.
Yes
Yes
Motor runs when the
machine is switched on.
In case of running
inconstantly, go to “No”.
Yes
No
Controller is broken.
Replace Controller.
The machine shows same symptom in spite
of the above corrective actions.
LED indicator
lamps are on.
LED indicator
lamps are on.
18 / 19

9TIGHTENING TORQUE SPECIFICATIONS
1
Housing R

Housing L
Bind PT 3x16 Tapping screw
1.1 – 1.3
8
2
Rear cover

Housing R, L
Bind PT 3x16 Tapping screw
1.1 – 1.3
2
3
Controller terminal
unit
Stator M3x6 Flat head screw 0.4 – 0.6 3
4
Controller print board

Stator
PT 2x6 Tapping screw
0.4 – 0.55
3
No. Parts to fasten Fastener
Tightening
torque
(N･m)
Q’ty
19 / 19