Makita BHP456 User Manual

T

ECHNICAL INFORMATION

PRODUCT

P 1/10

Model No.

Description

BHP456 (LXPH01*1)

Cordless Hammer Driver Drill

*1 Model number for North and Central American countries

CONCEPT AND MAIN APPLICATIONS

Model BHP456 (LXPH01) is the improved version of model BHP452, featuring;
More compact and lightweight design than BHP452
More comfortable operation will be provided by re-designed ergonomic grip
Compatible with the 18V Li-ion batteries equipped with the Battery protection
circuit designed to protect the battery from damages due to overdischarge,
high temperature or overload current

This new product is available in the following variations.

Model No.

BHP456RHE
(LXPH01C)

BHP456RHEW
(LXPH01CW)

BHP456RFE
(LXPH01)

BHP456RFEW
(LXPH01W)

BHP456Z
(LXPH01Z)

BHP456ZW
(LXPH01ZW)

BHP456SHE
BHP456SHEW

Model number in parentheses is for North and Central American countries.
All models also include the accessories listed below in "Standard equipment".

Battery

Type Quantity

BL1815 DC18RA Yes

BL1830

No No

Battery

cover

2

2

No No

1

1

Charger

DC18RA

DC18SD Yes2BL1815 1

Plastic

carrying case

Yes

No

Housing

color

Makita blue

white

Makita blue

white

Makita blue

white

Makita blue

white

L

W

(with Battery BL1815)

Dimensions: mm (")

Length (L)

Width (W)

Height (H)

*2: with Battery BL1815
*3: with Battery BL1830

206 (8-1/8)

79 (3-1/8)

234 (9-1/4)*2

251 (9-7/8)*3

H

Specification

Voltage: V

Battery

Max output: W
No load speed: min-1=rpm

Impacts per minute: min-1= rpm

Capacity of drill chuck: mm (")

Capacity: mm (")

Torque setting

Clutch torque setting: N.m (in.lbs) 1.0 - 5.0 (9 - 44)
Lock torque: N.m (in.lbs)

Max. fastening
torque: N.m (in.lbs)

Electric brake
Mechanical speed control

Variable speed control
Reversing switch

LED job light
Weight according to

EPTA-Procedure 01/2003*4: kg (lbs)

*2: with Battery BL1815, *3: with Battery BL1830

*4 with the lightest battery available for the model

Capacity: Ah
Cell

Charging time (approx.): min. 15/ 22 with DC18RA

Low/ High

Low/ High 0 - 6,000/ 0 - 22,500

1.5 (1/16) - 13 (1/2)

Steel
Wood

Masonry 13 (1/2)

16 stage + drill mode

Soft joint
Hard joint

1.6 (3.4)*2/ 1.8 (4.0)*3

18

1.3/ 3.0
Li-ion

300

0 - 400/ 0 - 1,500

13 (1/2)

38 (1-1/2)

54 (480)
36 (320)
50 (440)

Yes

Yes (2 speed)

Yes
Yes

Yes

Standard equipment

+ - bit 2-45 ........ 1

Belt clip ............ 1

Note:

The standard equipment for the tool
shown above may vary by country.

Optional accessories

Fast charger DC18RA,
Charger DC18SD,
Charger DC24SC (for all countries
except North American countries),
Automotive Charger DC18SE,
Battery BL1815,
Battery BL1830,
Drill bits for wood,
Drill bits for steel,
Drill bits for masonry,
Belt clip,
Bit holder

P 2/10

Repair

CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.

[1] NECESSARY REPAIRING TOOLS

[2] LUBRICATIONS

[3] DISASSEMBLY/ASSEMBLY
[3]-1. Drill chuck

Code No.

1R359

Description Use for

Hex wrench 10 Removing / Assembling drill chuck

Drill chuck removing tool

Removing Drill chuck
(Use this tool if Drill chuck cannot be removed by the method

described in “ [3]-1. Drill chuck disassembling”.)

DISASSEMBLING

Lubrications are not required as Gear section is replaced as a factory-lubricated gear unit.

(1) Set Machine and Repairing tools. (Figs. 1, 2, 3)

CORRECT WRONG

Fig. 3

Fig. 1 Fig. 2

Note:

Use Impact driver to unscrew
M6 x 22 Flat head screw if it
could not be removed manually.

Open Keyless drill chuck fully and
remove M6 x 22 Flat head screw
by turning it clockwise.

M6 x 22 Flat head screw

F/R Change lever

Set Speed change lever
to Low speed mode
indicated by "1".

Set Change ring
to Drill mode.

Speed change lever

Change ring

Set F/R Change lever to

Reverse (counterclockwise)

rotation.

Attach battery.

Setting of Hex wrench 10

Vise

Grip flat surfaces
of Hex wrench 10.

Hex wrench 10

Hex wrench 10,
viewed from side [A]

Vise

Grip the long end.

[A]

Do not grip edges of
Hex wrench.

Do not grip
the short end.

P 3/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-1. Drill chuck (cont.)

DISASSEMBLING

(2) Remove Drill chuck. (Fig. 4)

*Note: The rotational direction is viewed from operator.

1. Grip Hex wrench 10 with Drill chuck and hold Machine.
Important:
Be sure to hold the grip of Machine tightly with sufficient
counterclockwise* force against clockwise* recoil force
of Machine.

2. Pull Switch trigger slowly.

3. Spindle rotates counterclockwise* and consequently
Drill chuck is removed from spindle.

Hex wrench 10

Fig. 4

ASSEMBLING

Fig. 5 Fig. 6

end of the threaded

portion of Spindle

Drill chuck

(1) Set the machine. (Figs. 5, 6)
(2) Set Hex wrench 10 to vise as described in Fig. 3.

Turn Drill chuck clockwise until it sits on
the end of the threaded portion of Spindle.

F/R Change lever

Set Speed change lever
to Low speed mode
indicated by "1".

Set Change ring
to Drill mode.

Speed change lever

Change ring

Set F/R Change lever to
Forward (clockwise) rotation.

Attach battery.

Counterclockwise* force
to be applied by operator

Clockwise* recoil force

of Machine

P 4/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-1. Drill chuck (cont.)

(3) Tighten Drill chuck. (Fig. 7)

ASSEMBLING

DISASSEMBLING

Hex wrench 10

Fig. 7

Fig. 8

M6x22 Flat head screw

4. Open Keyless drill chuck fully,
then drive M6x22 Flat head screw
by turning counterclockwise*

with Impact driver.

[3]-2. Gear assembly and Motor section

Rear cover

1. Unscrew two 3x16 Tapping screws,
then remove Rear cover.

2. Pull Carbon brushes in the direction of the arrow
after shifting the end of each Torsion spring from
the top of Carbon brushes.

Carbon brushes

(1) First, remove Drill chuck. (Figs. 1, 2, 3, 4)
(2) Then remove Rear cover and disconnect Carbon brushes from Armature’s Commutator
before dismantling Housing set. (Fig. 8)

Counterclockwise
recoil force
of Machine

*Note: The rotational direction is viewed from operator

1. Grip Hex wrench 10 with Drill chuck and hold Machine.
Important:

Be sure to hold the grip of Machine tightly with sufficient
clockwise* force against counterclockwise* recoil force
of Machine.

2. Pull Switch trigger slowly to turn Spindle clockwise*.

3. Drill chuck is tightened and consequently Spindle is locked.

Clockwise* force

to be applied by

operator

Shift the end of each
Torsion spring to the
concave portion of
Brush holder.

Note:
Apply adhesive (ThreeBond 1321B/
1342 or Locktite 242 to threaded
portion) when re-using removed

M6x22 Flat head screw.

P 5/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-2. Gear assembly and Motor section

(3) Disassemble Gear assembly and Motor section. (Fig. 9)

Fig. 9

DISASSEMBLING

3. Unscrew nine 3x16 Tapping screws,
then remove Housing (R).

4. Remove the assembly of
Motor section and Gear section.

Housing (R)

5. Remove Speed change lever,
then separate Gear assembly
from Motor section.

6. Remove Armature along with Yoke unit
from Brush holder complete.

Gear assembly

Brush holder
complete

Armature

Yoke unit

Armature

7. Pull Armature from Yoke unit.

Yoke unit

Motor section

Speed change lever

P 6/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-2. Gear assembly and Motor section (cont.)

(4) Insert Armature into Yoke unit carefully and connect Motor section to Gear assembly. (Fig. 11)

(3) Put Leaf spring in place on the inside of Housing (L). (Fig. 10)

Fig. 11

Fig. 10

ASSEMBLING

1. Insert Commutator end
into Brush holder complete.

3. Mount Speed change lever to Gear assembly. (Refer to Fig. 14)

notch

Be sure to put Leaf spring
in place as drawn on the right.

Notch must be located on Armature
drive-end as above.

[Wrong][Correct]

Note: Be careful when inserting
Armature as fingers can
be pinched and injured.

[Wrong][Correct]

Be sure to hold Commutator portion as your fingers
can be pinched by Armature fun due to strong magnetic
force toward Yoke unit.

2. Connect Motor section to
Gear assembly by engaging
Armature gear with Planetary
gears in Gear assembly.

Leaf spring Housing (L)

P 7/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-2. Gear assembly and Motor section (cont.)

(5) Engage the notch of Yoke unit with the projection inside of Housing (L) when mounting the assembly of Gear section
and Motor section to Housing (L). (Fig. 12)

(6) Adjust the assembly of Motor section and the Gear section to the correct position in Housing (L)
so as to assemble Housing (R) to Housing (L) smoothly and exactly. (Fig. 13)

Fig. 12

Fig. 13

ASSEMBLING

projection for fitting

to the notch

Engage the notch of Yoke unit with the projection inside of Housing (L).

Housing (L)

notch

Yoke unit

The flat portion of Brush holder must be at
exactly 90 degrees to the edge of Housing (L).

edge of
Housing (L)

Brush holder

complete

Housing (L)

flat portion of
Brush holder
complete

90 degrees

Yoke unit must be mounted
within these ribs.

This rib must be fit in
the groove of Change ring.

P 8/10

Repair

[3] DISASSEMBLY/ASSEMBLY
[3]-3. Speed change lever

Assemble Speed change lever to Gear assembly. (Fig. 14)

Mount F/R Change lever on Switch before assembling Housing (R) to Housing (L). (Fig. 15)

Fig. 14

Fig. 15

ASSEMBLING

1. Be sure to put two
Compression springs
on the back of
Speed change lever.

hook

2. Mount Speed change lever to
Gear assembly.

Note: Be sure to fit the hook of
Gear assembly in Speed change
lever.

Gear assembly

3. Set Speed change lever to either
Low speed side or High speed side.

Low speed side

High

speed side

Compression springs

[3]-4. F/R Change lever

F/R Change lever

projection

Engage the fork portion
with the projection of Switch.

fork portion

Circuit diagram

P 9/10

Fig. D-1

White

Color index of lead wires' sheath

Black
Red

Yellow

Brush holder
complete

Switch

Terminal

Connector

FET (Field effect transistor)

LED
job light

Line filter

Line filter is not used
for some countries.

Wiring diagram

P 10/10

Fig. D-3

Fig. D-2

Brush holder

complete

Lead wire wiring of Brush holder complete

Switch

Terminal

boss

Connector

Line filter

Wiring in Grip portion

Fix Lead wires in these
Lead wire holders.

Place Line filter here
if it is used.

Line filter

2. Assemble Receptacles to
Lead wires.

1. Pass Lead wires of Brush holder complete
through Line filter if it is used.

Receptacle

Line filter

Line filter is not used
for some countries.

LED job light

LED Lead wires must be
tight in this area indicated
by the dotted line.

Pass Lead wires to Switch
in this area.
Do not pass between
the boss and Housing wall.