ECHNICAL INFORMATION
NEW TOOL
T
P 1 /13
HP2070, HP2070F, HP2071, HP2071F
Models No.
W
Description
20mm (3/4") 2-Speed Hammer Drill
W L
L
CONCEPT AND MAIN APPLICATIONS
These hammer drills have been developed as the highest
H
specification models of Makita hammer drills.
H
Their features are;
* Powerful 1,010W motor
HP2071
* New reversing system prevents the speed reduction of
HP2070
motor in reverse rotation.
* Mechanical 2 speed, and electronic speed adjusting dial
for presetting maximum speed
Dimensions : mm [inch]
* LED job light convenient for operations at dimly lit job sites
Length ( L )
362 [14-1/4]
(HP2070F and HP2071F)
* Keyless drill chuck (HP2071 and HP2071F) Height ( H )
220 [8-5/8]
Width ( W ) 70 [2-3/4]
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output (W)
Input Output
110 50 / 60 1,010 600 1,100
9.7
120 50 / 60 940 600 1,100
8.2
1,010 600 1,100
220 4.8 50 / 60
230 4.6 50 / 60 1,010 600 1,100
50 / 60 1,010 600 1,100
240 4.4
Model No. HP2070 HP2070F HP2071 HP2071F
High 0 - 2,900
No load speed
(min -1= rpm)
Low 0 - 1,200
Blows per min. High 0 - 58,000
(min -1= bpm)
0 - 24,000
Low
Keyed Keyless
Drill chuck
Chuck ability (mm [inch])
2.0 - 13 [1/16 - 1/2]
Concrete 20 [13/16]
High 8 [5/16]
Steel
Drilling capacity
Low 16 [5/8]
(mm [inch])
High 25 [1]
Wood
Low 40 [1-9/16]
Reverse switch Yes
2 speed
Mechanical speed change
Torque limiter Yes
LED Job light No Yes No Yes
by double insulation
Protection against electric shock
Cord length (m [ft]) 2.5 [8.2]
Net weight (kg [lbs]) 2.4 [5.3]
Standard equipment Optional accessories
* T.C.T. drill bits Ø 5.0 - Ø 19.0 * Depth gauge
* Depth gauge ................................... 1 pc.
* Drill bits for steel Ø 5.0 - Ø 13.0 * Wrench
* Side handle set .............................. 1 set
* Drill bits for wood Ø 5.0 - Ø 40.0 * Blow out bulb
* Plastic carrying case ..................... 1 pc.
* Hole saws Ø 16 - Ø 120 * Keyless drill chuck set
* Chuck key S13 (HP2070 and HP2070F) .... 1 pc.
* Metal borer Ø 14 - Ø 35 * Drill chuck set
* Key holder (HP2070 and HP2070F) ..... 1 pc.
* Chuck key S13 for HP2070 and HP2070F * Side handle set
< Note >
* Drill stand type 43
The standard equipment for the tool
may differ from country to country.
P 2 /13
Repair
<1> Lubrication and Adhesive Application
Lubrication
Apply Makita grease N No.1 to the following portions designated by the black triangular mark to protect
the parts and the tool from unusual abrasion. (Fig.1)
Item No. in Amount
Part name Portion to lubricate
parts breakdown (g [oz])
Spindle Whole surface except threaded portion
3
Proper amount
Cam A Cam surface
8
Gear housing complete Gear chamber approx. 25 [7/8]
15
Change lever Teethed portion
17
Proper amount
Gear complete Teeth
19
Spur gear 29-37 Teeth
21
Fig. 1
3
8
15
19
21
17
Adhesive Application
Apply TREE BOND 1327 to the threaded portion of Bearing retainer when fastening
Bearing retainer to Gear housing complete. (Fig.2)
Fig. 2
Bearing retainer
Gear housing complete
P 3 /13
<2> Disassembling and Reassembling Procedures
1) Drill Chuck
Disassembly;
1) Secure a Drill chuck extractor (1R139) firmly with a vise as illustrated in Fig. 3.
2) Fix the Spindle on the Drill chuck extractor by inserting the Spindle into the U-shaped notch on the Drill chuck
extractor with the flat sides of the Spindle facing the edges of the notch. And then remove the Drill chuck by
turning it counterclockwise with the repairing tools (1R223, 1R224 and 1R298). (Fig. 4)
Use a pipe wrench to remove the Drill chuck, if the sleeve of the Drill chuck does not turn because of some troubles
with the Drill chuck. Grip the periphery of the sleeve with the wrench, and turn the wrench counterclockwise.
The keyed Drill chuck of HP2070/HP2070F can be removed using a Wrench 43 (781024-2).)
Reassembly;
When fastening the Drill chuck to the Spindle, set the torque of the Torque wrench shaft (1R223) to 35.7 to 45.9 N.m.
Fig. 3 Fig. 4
Drill chuck extractor
Torque wrench shaft Hex. bar 10 with Drill chuck extractor
(1R139)
17.0mm (11/16") 20-90 N.m (1R223) square socket (1R298) (1R139)
Ratchet head 12.7
(1R224)
Vise
2) Carbon Brush
Disassembly;
Fig. 5
1) Remove the three 4x25 Tapping screws, and separate the Handle cover
from the Motor housing. (Fig. 5)
Motor housing
2) Turn the Brush holder unit (= F/R switch) to reverse position, and then
Handle cover
remove the Carbon brush positioned on the opposite side of the Trigger
switch using a small slotted screwdriver. (Fig. 6)
3) Take the Trigger switch off from the Motor housing, and set the Brush
holder unit in neutral position. And then remove the Carbon brush on
Tapping
the side of the Trigger switch. (Fig. 7)
screw 4x25
Note; The Carbon brush on the side of the Trigger switch cannot be
(3pcs)
removed, if you turn the Brush holder unit in neutral position
before separating the Switch trigger from the Motor housing.
Fig. 6 Fig. 7
Carbon brush
on the opposite
side of Trigger
Brush holder unit
switch
Reverse
position
(A)
Carbon brush
on the side of
Trigger switch
Trigger switch
(view from A)
8419B
6300L
UT2201
HP2031
6300LR
6310
8420V
6013BR
DP4700
8406C
6300-4
8406
P 4 /13
<2> Disassembling and Reassembling Procedures
3) Armature assembly
Disassembly;
1) Remove the Carbon brushes as described on page 3. (Fig. 5, 6, 7)
2) Remove the three 4x35 Tapping screws, and then take out of the Motor housing the unit of the Armature assembly
and the Gear housing cover. (Fig. 8)
3) Remove the Rubber Pin 4 to separate the Change lever A and Lever case from the Gear housing cover.
4) And then remove the Gear housing cover from the Armature assembly using a Gear extractor (1R045). (Fig. 9)
5) The Ball bearing 607LLB on the side of commutator can be removed using a Bearing extractor (1R269).)
Fig. 8 Fig. 9
Change lever A
Gear extractor (large)
Lever case
(1R045)
Armature ass'y
Armature ass'y with
Gear housing cover
Motor housing
4x35 Tapping
screws (3pcs)
Gear housing cover
Rubber pin 4
4) Field and Brush holder unit
Disassembly;
1) Shift the Controller till the Connectors appears entirely out of the Motor housing, and disconnect the Connectors that
connect the Controller with the Field. (Fig. 10)
2) In order to remove the Field, remove the two 4x70 Tapping screws, and then gently hit the Motor housing with plastic
or wooden hammer. (Fig. 11)
Fig. 10 Fig. 11
Controller
Motor housing
Connectors
Lead wires
from Field
Tapping screw
4x70 (2pcs)
Fig. 12
3) The Brush holder unit can be
removed from the Motor housing
Receptacles
by pulling it in the direction of
Lead wire A
the black arrow after disconnecting
Lead wire B
the Lead wires which are connected
to the Brush holder unit with the Lead wire C
two Receptacles. (Fig. 12)
Brush holder unit
Lead wires
from color
A Trigger switch white
Controller 115V white Motor housing
B
Controller 220-240V blue
C Controller black
P 5 /13
Reassembly;
1) When replacing the Field, be sure to remove the Brush holder unit from the Motor housing before installing
a new Field. And install the Brush holder unit after installation of a new Field.
Note: When installing the Brush holder unit on the Motor housing, set the unit so that its two concave portions
face the direction of the Trigger switch. (Fig. 13)
2) When fastening the 4x70 Tapping screws (Field screws), be sure to press the end of the Brush holder unit so that
the unit cannot be pushed out of position. (Fig. 14)
Fig. 13 Fig. 14
Motor housing
Brush
holder unit
Concave portions
Push the end of
the Brush holder unit
5) Gear section
Disassembly;
1) Remove the three 4x35 Tapping screws, and then separate the Gear housing from the Gear housing cover. (Fig. 15)
2) By pulling the Lock plate from the Gear housing, the following parts can be removed from the Gear housing;
Change lever B, Pin 4, Rack 12, Spur gear 29-37 (Fig. 16)
Fig. 15 Fig. 16
Gear housing Gear housing cover Gear housing Spur gear 29-37
Rack 12
Pin 4
Lock plate
Change lever B
Tapping screw
4x35 (3pcs)
Reassembly;
1) Assemble the Spindle section to the Gear housing as illustrated in Fig. 17.
Fig. 17
Bearing retainer with Oil seal 19
Gear housing
Spindle section
(includes Conical compression spring, Ring spring 11
Cup washer 15, Ball bearing 6202LLB and Cam A.)
Note: When assembling the Bearing retainer 20-36 and the Oil seal 19,
refer to " 6) Bearing retainer 20-36 and Oil seal 19" on page 7.
("Reassembly of Gear section" continues to page 6.)
P 6 /13
2) Insert the arms of the Change plate B through the slots in the Rack 12, and then put the Spur gear 29-37 between
the arms of the Change plate B. (Fig. 18)
3) Insert the Pin 4 into the Rack 12. Place the Gear housing as illustrated below, and then install the Gear 29-37 on
the Spindle together with the parts you have assembled to the Gear 29-37. (Fig. 19)
At this time, do not fail to set the Leaf spring in place in the Gear housing. (Fig. 19)
Fig. 18 Fig. 19
Spur gear 29-37
Gear housing
Spur gear 29-37
Leaf spring
Rack 12
Pin 4
arm
Rack 12
Spindle
Change plate B
with change plate B
Fig. 20
4) Push the Rack 12 into the Gear housing till
it stops.
Spindle
And then, install the Change lever B on the
Gear housing with its "I" mark which indicates
low speed aligned with the triangular mark on
Spur gear 29-37
the Gear housing. (Fig. 20)
5) Install the Lock plate on the Gear housing with
its tail portion inserted between the ribs on the
Gear housing as illustrated in Fig. 20.
Rack 12
Ribs
Change lever B
Lock plate
Align with I.
Fig. 21
6) Assemble the Gear complete to the Gear housing
as illustrated in Fig. 21.
Note: Do not disassemble the Gear complete,
because it has torque limiter function
and requires very difficult adjustment Gear complete
when reassembled.
P 7 /13
6) Bearing Retainer 20-36 and Oil Seal 19
Disassembly;
1) Using an Adjustable bearing retainer wrench (1R316), remove the Bearing retainer from the Gear housing. (Fig. 22)
As the Bearing retainer has left-hand threads, turn the Bearing retainer 20-36 clockwise for loosening. (Fig. 23)
2) And then remove the Oil seal 19 from the Bearing retainer by deforming the seal with small slotted screwdriver.
Fig. 22 Fig. 23
Adjust the distance between the pins on the wrench to the
diagonal distance between two U-shaped depressions on the
Turn clockwise
Bearing retainer.
U-shaped depression
Pins
Adjustable bearing
retainer wrench
(1R316)
Bearing retainer
Reassembly;
1) Press-fit the Oil seal 19 into the Bearing retainer using an arbor press and a Round bar 100 (1R251). (Fig. 24)
Note: When installing a fresh Oil seal 19, apply proper amount of Makita grease N No.1 to its periphery beforehand.
2) Put appropriate amount of Three bond 1327 to the threaded portion of the Bearing retainer.
And then fasten the Bearing retainer securely to the Gear housing by turning it counterclockwise with an Adjustable
bearing retainer wrench (1R316). (Fig. 25)
Fig. 24 Fig. 25
Arbor press
Bearing retainer
Turn counterclockwise
Round bar 100
(1R251)
Apply Three bond 1327
Oil seal 19 to the threaded portion
Bearing retainer
P 8 /13
6) Spindle section
Disassembly;
1) Remove the Ring spring 11 from the Spindle section using a Retaining ring S pliers. (Fig. 25)
2) Hold the Ball bearing 6202LLB on the Pipe 30 (1R232), and then, by pressing the Spindle with arbor press,
the following parts can be removed from the Spindle;
Cam A, Ball bearing 6202LLB, Cup washer 15, Conical compression spring (Fig. 26)
Fig. 25 Fig. 26
Cam A
Spindle section
Ball bearing
6202 LLB
Arbor press
Cup washer 15
Spindle
Conical compression
Slotted screwdriver
spring 15-24
Cam A
Ball bearing
Ring spring 11
6202 LLB
Spindle
Pipe 30
Retaining ring S pliers (1R232)
(1R004)
Reassembly;
1) Install the Conical compression spring 15-24 and the Cup washer on the Spindle as illustrated in Fig. 27.
Fig. 27
(armature side)
Cup washer 15
Spindle
Conical compression
spring 15-24
[Correct] [Wrong]
(chuck side)
2) Press-fit the Cam A and the Ball bearing 6202LLB onto the Spindle using the following repairing tools;
Arbor press, Bearing setting pipe 15.2-23 (1R029), Bearing setting pipe 17.2-25(1R030),
Bearing setting plate (1R035) (Fig. 28)
Fig. 28
Cam A
Ball bearing
Arbor press
6202 LLB
Bearing setting
pipe (1R029)
Spindle
Bearing setting
pipe (1R030)
Cam A
Cup washer 15
Ball bearing
6202 LLB
Conical compression
spring 15-24
Bearing setting
plate (1R035)
P 9 /13
Circuit diagram
1) HP2070 & HP2071 (without LED job light)
Color index of lead wires
Black
White
Red
Yellow
Connectors
black or brown
1
2
white or blue
C1
Controller
Switch
C2
M1
M2
Noise
Connectors
suppressor
Thermistor
Color of lead wire;
white (115V)
blue (220-240V)
Field
Brush holder unit Carbon brush
Carbon brush
on the opposite side
on the side of Switch
of Switch
Note: Noise suppressor is not used for some countries.
Power supply cord
P 10 /13
Circuit diagram
2) HP2070F & HP2071F (with LED job light)
Color index of lead wires
Black
White
Red
Yellow
Connectors
black or brown
1
2
white or blue
C1
Controller
Switch
C2
M1
M2
Connectors
Thermistor
Color of lead wire;
white (115V)
blue (220-240V)
Field
Brush holder unit Carbon brush
Carbon brush
on the opposite side
on the side of Switch
of Switch
Noise
suppressor
LED
Light circuit
Note: Noise suppressor is not used for some countries.
Power supply cord
Color of lead wire;
red (115V)
blue (220-240V)
Case of printed
wiring board
P 11 /13
Wiring diagram (1)
1) HP2070 & HP2071 (without LED job light)
Route lead wires as illustrated in Fig. 28.
Fig. 28
A) Fix the two lead wires (a, b) from the Controller at the lead holder.
B) Route the lead wires (a, b, c, d, e, f) from the Controller between the rib and the boss.
C) Fix the white lead wire (c) from the Controller at the lead holders.
D) Fix the red lead wire (b) from the Controller at the lead holders.
E) Route the lead wires (b, g, i, j, k) between the rib and the Switch.
F) Route the lead wires (h) from the Power supply cord between the ribs and the wall of the Motor housing.
B A
a
Lead holder
b
c
Boss
d
Rib
e
f
C
D
k
Connectors
j
i
E
Rib
g
Switch
Lead wires
color from to
a black Controller Field
h
b red Controller Switch
white (115V)
c
Controller Field
F
blue (220-240V)
d black Controller Connector
e red Controller Connector
f white Controller Connector
Noise suppressor
g white Switch Field
(not used for some
black or brown Power supply
Thermistor
h
countries.)
cord
white or blue via Controller
i black Switch Connector
j red Switch Connector
k
yellow Switch Connector
P 12 /13
Wiring diagram (1)
2) HP2070F & HP2071F (with LED job light)
Route lead wires as illustrated in Fig. 29.
Fig. 29
A) Fix the two lead wires (a, b) from the Controller at the lead holder.
B) Route the lead wires (a, b, c, d, e, f) from the Controller between the rib and the boss.
C) Fix the white lead wire (c) from the Controller at the lead holders.
D) Fix the red lead wire (b) from the Controller at the lead holders.
E) Route the lead wires (b, g, i, j, k) between the rib and the Switch.
F) Route the lead wires (h, l) as illustrated below in "cross section of F".
G) Route the lead wires as illustrated below.
B A
a
Lead holder
b
c
Boss
d
Rib
e
f
C
Lead wires
D
color from to
k
a black Controller Field
Connectors
b red Controller Switch j
white (115V)
i
c
Controller Field
blue (220-240V)
E
d black Controller Connector
Rib
e red Controller Connector
f white Controller Connector
g
g white Switch Field
Switch
black or brown Power supply
Thermistor
h
cord
white or blue via Controller
i black Switch Connector
j red Switch Connector
k
yellow Switch Connector
h
red (115V)
Case of printed
l
Switch
blue (220-240V)
wiring board
Case of printed
Case of printed
m
white LED
wiring board
wiring board
F
[Cross section of F]
Noise suppressor
Case of printed
m
(Integral part of
wiring board
Light circuit; not
h (lead wires from
used for some
Power supply cord)
LED countries.)
G
l (lead wires from the
Case of printed wiring
Motor housing
board to the Switch)
P 13 /13
Wiring diagram (2)
For all models
Fig. 30
When installing the Brush holder unit on the Motor
housing, set the unit so that its two concave portions
Motor housing
face the direction of the Trigger switch. (Fig. 30)
Brush
holder unit
Place the Connectors as illustrated in Fig. 31.
Do not place it on the side of the U-shaped notch in the
Motor housing.
Concave portions
Note:
Be careful not to pinch the lead wires between the Motor
housing and the Controller.
Fig. 31
Connectors
Controller
Do not pinch the lead wires
Motor housing
between the Motor housing
and the Controller.
U-shaped notch
Keyless drill chuck 13
HP2071 & HP2071F
If the Keyless drill chuck 13 cannot be loosened because of a jammed drill bit, take the following procedures to
loosen the chuck;
1) Fix the sleeve section of the chuck securely with an adjustable spanner, etc. (Fig. 31)
Note: Don not fix the retaining section at this time.
2) And then, with a wrench 19, etc, turn the hex. nut on the top of the chuck clockwise to loosen the chuck. (Fig. 31)
Fig. 31
Retaining ring portion Wrench 19
Sleeve portion
Hex nut
Pipe wrench
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