Makita BHP448 Handbuch

P 1/ 12

CONCEPT AND MAIN APPLICATIONS

Specification

Model No. BHP448

Description 14.4V Cordless Hammer Driver Drill

Standard equipment

Optional accessories

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

Fast charger DC18RA

(for US, Canada, Guam, Panama, Mexico and Colombia)

Fast charger DC18RC

(for all countries except the countries above)

Battery protectors

Drill bits for wood

Drill bits for steel

Drill bits for masonry

Driver bitsCharger DC18SD

Charger DC24SC

Automotive charger DC18SE

Battery BL1430

+ – bit 2-45 ................ 2

Bit holder .................. 1

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

Grip assembly ............ 1

Model BHP448 is a successor model of BHP444, featuring:

• Extremely compact tool size with an overall length of 225mm (8-7/8") -

the shortest in its class

• High power and productivity achieved with new DC motor (FD31-30)

• Enhanced dust and drip-proof performance to ensure reliable operation

even under bad weather.

• Equipped with Battery fuel gauge for increased maneuverability.

This product is available in the following variations.

PRODUCT

Housing

color

BHP448RFE DC18RC

Model No. Type Quantity Charger Plastic

carrying

case

Battery

cover

Yes2

Battery

BL1430 1

No NoNoNo NoBHP448Z

Makita

blue

BHP448RFE3 DC18RC Yes

Systainer

case

BHP448RFX DC18RC No2BL1430 1 Yes

No NoNoNo NoBHP448ZX Yes

No3BL1430 2

Battery

Capacity of drill chuck: mm (")

Capacity: mm (")

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

Electric brake

Variable speed control

Mechanical speed control

Reversing switch

Max fastening

torque: N.m (in.lbs)

Torque setting

Steel

Wood

Soft joint

Hard joint

No load speed:

minˉ¹=rpm

Energy capacity: Wh

Voltage: V

Capacity: Ah

High

Weight according to

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

Low

Cell Li-ion

Charging time (approx.): min. 22 with DC18RC (DC18RA*3)

14.4

3.0

Yes

Yes (2 speeds)

Yes

2.2 (4.9)

13 (1/2)

65 (2-9/16)

21 stage + drill mode

Clutch torque setting: N.m (in.lbs) 1.0 - 10.0 (9 - 89)

67 (590)

43 (380)

77 (680)

0 - 1,800

0 - 350

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

LED job light

TECHNICAL INFORMATION

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 225 (8-7/8)

79 (3-1/8)

259 (10-1/4)

Note: This product is not compatible with 14.4V-1.3Ah battery BL1415.

Depth rod ................... 1

Masonry 14 (9/16)

Impacts per minute:

minˉ¹=ipm

High

Low

0 - 27,000

0 - 5,200

*with Battery BL1430

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Drill Chuck

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

DISASSEMBLING

Fig. 1

M6x22 Flat head screw (Left handed thread)

(1) Remove M6x22 Flat head screw as drawn in Fig. 1.

(2) Preset the machine as drawn in Fig. 2. And set Hex wrench 10 to Vise as drawn in Fig. 3.

(3) Gripping Hex wrench 10 with Drill chuck firmly, remove Drill chuck as drawn in Fig. 4.

Fig. 2

Attach Battery.

F/R change lever

Set F/R Change lever

to Reverse (counter-

clockwise) rotation.

Set Speed change lever

to Low speed mode

designated with 1.

Speed change lever

Set Change ring

to Drill mode.

Change ring

P 2/ 12

Repair

It is not required to lubricate the gear section because the portion is replaced as a factory-assembled gear unit.

[1] NECESSARY REPAIRING TOOLS

[2] LUBRICATION

Code No. Description Use for

1R359 Drill chuck removing tool

Hex wrench 10

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

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

removing/ mounting Drill chuck

Open Drill chuck fully and remove M6x22

Flat head screw by turning it clockwise.

CORRECT WRONG

Fig. 3

Fig. 4

Setting of

Hex wrench

Vise

Grip flat surfaces

of Hex wrench 10.

Hex wrench 10

Hex wrench 10,

viewed from side [A]

Vise

Hold the long end.

[A]

Do not hold edges

of Hex wrench 10.

Do not hold

the short end.

Hex wrench 10,

viewed from side [A]

Note: Use Impact driver to unscrew

M6x22 Flat head screw if it

could not be removed

manually.

[A]

Clockwise

Counterclockwise

Hex wrench 10

Vise

Clockwise* recoil force

of Machine

*Note: The rotational direction is viewed from operator.

1. Hold Hex wrench 10 with Drill chuck and grip Machine.

Important:

Grip Machine tightly with both hands to provide

the 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.

Counterclockwise* force to be applied by operator

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Drill Chuck (cont.)

P 3/ 12

Repair

ASSEMBLING

Fig. 5

End of the threaded

portion of Spindle

Drill chuck

Fig. 6

Attach Battery.

F/R change lever

Set F/R Change lever

to Forward (clockwise)

rotation.

Set Speed change lever to Low speed

mode designated with 1.

Speed change lever

Set Change ring to Drill mode.

Change ring

Counterclockwise

Hex wrench 10

Fig. 7

Clockwise

4. Open Drill chuck fully, and tighten Drill chuck

with M6x22 Flat head screw by turning it

counterclockwise with Impact driver.

(1) Set the machine. (Fig. 5 and 6)

(2) Set Hex wrench 10 to vise and described in Fig. 3.

(3) Set Drill chuck in place. (Fig. 7)

M6x22 Flat head screw

(Left handed thread)

Turn Drill chuck clockwise by hand until

it sits on the end of the threaded portion

of Spindle.

Note: Apply adhesive (ThreeBond 1321B/1342 or Loctite 242)

to threaded portion when re-using the removed M6x22

Flat head screw.

Counterclockwise recoil

force of Machine

*Note: The rotational direction is viewed from operator.

1. Hold Hex wrench 10 with Drill chuck and grip Machine.

Important: Grip Machine hard with both hands to provide

sufficient clockwise* force against

counterclockwise* recoil force of Machine.

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

Note: Pull the Trigger so that Spindle’s rotating reaches full

speed in one second.

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

Clockwise* force to be

applied by operator

P 4/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Gear Assembly, Motor Section

DISASSEMBLING

Fig. 8

1. Remove two 3x16 Tapping screws and Rear cover.

And remove four 4x18 Tapping screws.

After removing Drill chuck (Re: Figs. 1, 2, 3and 4), disassemble Motor section and Gear assembly. (Figs. 8 and 9)

2. Remove Housing R, unscrewing

seven 3x16 Tapping screws.

3. Pull out Heat sink section, and remove Gear assembly

together with Motor section and Speed change lever.

4. Remove Speed change lever and Motor section

from Gear assembly.

Gear assembly

Speed change leverMotor section Motor section

Rear cover

3x16 Tapping

screw (2 pcs.) 4x18 Tapping

screw (4 pcs.)

3x16 Tapping screw (7 pcs.)

Heat sink

section

Speed change

lever assembly

rear

Compression

spring 4

front Compression spring 4 compressed

by the lever of Gear assembly

Drill chuck sideMotor side Drill chuck side

Motor side

5. Push Speed change lever assembly toward Motor side

until it stops to have space between the pin on the lever

of Gear assembly and rear Compression spring 4.

6. Lifting up Motor side of Speed change lever assembly,

pull it toward the direction designated with arrow.

Space between rear Compression spring 4

and the pin on the lever of Gear assembly.

Pin on

the lever of

Gear assembly

Fig. 9

Torsion spring

Carbon brush

Brush holder complete

Yoke unit

Armature

Note: Pay attention not to pinch your finger between Yoke unit and Armature when removing.

Do not scratch the copper wires of Armature. Yoke unit draws Armature by its considerable

strong magnet force.

5. Shift the tail of Torsion spring from top of Carbon

brush to the Notch of Brush holder. Carbon brush

gets free from the pressure of Torsion spring.

6. From Armature, pull off Brush holder complete and Yoke unit.

P 5/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Gear Assembly, Motor Section (cont.)

ASSEMBLING

Fig. 10

(1) Assemble Motor section taking the reverse step of Disassembling. Refer to Fig. 9.

Insert Armature into Yoke unit as drawn in Fig. 10.

(2) Assemble Brush holder complete to Commutator end of Armature. Refer to the drawings in Fig. 9.

Carbon brushes in Brush holder complete have to be still left from Armature’s commutator in this step.

(3) Fasten Heat sink with Pan head screw to Yoke unit. And insert the Motor section into Gear assembly, while engaging

Armature’s gear with the Planet gears in Gear assembly. Refer to the center right drawing in Fig. 8.

(4) Before mounting Speed change lever assembly, make sure that Lead springs and Compression springs are assembled

to Speed change lever assembly. See Fig. 11.

Note in Assembling:

1. Do not pinch your finger between Armature fan and Yoke unit.

2. Insert Armature into Yoke unit carefully so that its wire does not

damage.

[Wrong][Correct]

Notch

Yoke unit has to be assembled to Armature so that its notch is located

on the drive-end side.

Fig. 11

Leaf spring ( 2 pcs.) Compression

spring 4 ( 2 pcs.)

P 6/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Gear Assembly, Motor Section

ASSEMBLING

Fig. 12

Fig. 13

(5) Assemble Speed change lever assembly as drawn in Fig. 12.

(6) Assemble Motor section and Gear assembly as illustrated in Figs. 13 and 14.

If the Motor section does not fit to

Housing L, make sure that Yoke unit

is correctly amounted to Armature.

See Fig. 10.

Housing Set (L)

rear Compression

spring 4

front Compression spring 4

compressed by the lever of

Gear assembly.

Drill chuck

side

Motor side

Pin on the lever

of Gear assembly

Drill chuck

side

Motor side

Drill chuck

side

Motor side

front Compression spring 4

1. Apply the front Compression

spring 4 of Speed change lever

assembly to the flat side

(without pin) of Gear assembly

for Speed change.

2. Push Speed change lever assembly

toward Motor side until it stops to

have space between pin of Gear

assembly and rear Compression

spring 4.

3. Fit the pin of Gear assembly to

Spring’s coil with slowly

returning Speed change lever

assembly toward Drill chuck side.

Space between rear Compression spring 4

and pin on the lever of Gear assembly

Pin on the lever of Gear assembly fit to

the coil of rear Compression spring 4

protrusion

notch Yoke unit

Brush holder complete

Gear ass’y

While aligning the notch of Yoke unit with projection of

Housing L, mount Yoke unit together with Gear ass’y

and Motor section to Housing L.

4. Slide Speed change lever

assembly to the either position

2(High speed mode) or

1 (Low speed mode).

P 7/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Gear Assembly, Motor Section (cont.)

ASSEMBLING

Fig. 14

Yoke unit

Attach the edge of Yoke unit

to the rib of Housing L.

rib of Housing L

Brush holder complete

Gap arises between Housing R and L when Gear assembly is fastened to Housing R and L.

Holding Housing R and L with Water pump pliers at the portion by their screw holes (designated with

black triangles), fasten Gear case assembly to Housing set with 4x18 Tapping screws.

Housing set (R)

Gap

Gear case assembly

Housing set (R)

Note in Assembling: Be careful not to give any damage on Housing set when holding with Water pump pliers.

Gear case assembly

The flat portion of Brush holder complete must be

at 90 degrees to the edge surface of Housing L.

flat portion of Brush holder complete

edge surface of

Housing L

(8) Fasten Housing R to Housing L with seven 3x16 Tapping screws.

Refer to the upper right drawing in Fig. 8.

(9) Contact Carbon brush with Armature’s commutator, putting Torsion spring on the Carbon brush.

Refer to the left drawing in Fig. 9.

Brush holder

complete

90 degrees

(7) Make sure Brush holder complete and Yoke unit are precisely mounted to Housing R. See upper drawing in Fig. 14.

And then, mount Housing R to Housing L as drawn in Fig. 14.

Housing set (L)

4x18 Tapping screw

P 8/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -3. F/R Change Lever

[3] -5. Parts related to Drip-proof structure

ASSEMBLING

Fig. 17

Assemble Sponge B to Housing L. And assemble Seal and Sponge A to Housing L as drawn in Fig. 17.

Assemble Sponge B to Housing R

to the portion designated with

gray color.

Sponge B

Sponge A

Note: To assure Drop-proof, use new Sponge A and Sponge B.

Assemble Sponge A to Seal.

Note: Edge of the assembled Sponge A

has to be flat to the surface of Seal.

Seal

Housing R Housing L

Assemble the Seal to

Housing L as drawn below.

Projection

Prong

ASSEMBLING

[3] -4. Switch plate complete

ASSEMBLING

Put the projection on Switch between the prongs of F/R change lever. (Fig. 15)

Fig. 15

Housing L

Switch plate

complete

Insert Switch plate complete to Housing L,

facing its symbol of Fuel gauge to

Housing R side.

Note: Switch plate complete with

faced in the wrong direction

can not be inserted to

Housing L. Symbol of

Fuel gauge

Housing R side

Set Switch plate complete

in place. (Fig. 16)

Fig. 16

ASSEMBLING

[3]-6. Cushion

Be sure to install Cushion into

Housing set (L) as drawn in Fig. 18R.

Note: Fig. 18F is the wrong installation.

Pay attention to the direction.

[Correct] [Wrong]

CushionHousing set (L) Housing set (L) Cushion

Fig. 18R Fig. 18F

P 9/ 12

Circuit diagram

Wiring diagram

Fig. D-1

Fig. D-2

Color index of lead wires' sheath

Black

Red Blue

Yellow

Brush holder

complete

Circuit with Battery fuel gauge

available for the countries

other than North American countries

FET

LED

Light

circuit

Switch

Red Lead wire is used

for some countries

instead of white.

Terminal

LED

Wire connecting

portion

Fix LED lead wires with Lead wire holders

drawn below.

Wiring of LED Lead Wires

(before setting Switch)

Wiring to Terminal

Lead wire

holder

Their lead wires must

be tight between Lead

wire holders so that

Switch can be set in

place.

The Flag connector has to be connected so that

its wire connecting portion is located over

the mark of + - poles.

Fig. D-3

P 10/ 12

Wiring diagram

FET

Wiring to Switch

Connect the Lead wires to Switch, tilting their

Connectors to 45 degrees as drawn below.

Wiring in Housing L

Fix the FET Lead wires as follows:

yellow with Lead wire holder nearest to Switch trigger

blue with the center Lead wire holder

black with Lead wire holder farthest from Switch trigger

Lead wire

holder

yellow

blue

black

Switch trigger

Fig. D-4

Fig. D-5

Line filter

Seal

Put Line filter in

this place.

Sponge

Put the bundled Lead wires

into the groove of Sponge.

Pay attention, not to put

Lead wires on the Seal.

Lead wires connected to

Connector have to be fixed

with Lead wire holders.

Connector

Light circuit

with Battery fuel gauge available for the countries

other than North American countries

45 degrees

Brush holder complete

Put Pigtail of Carbon brush

in the area marked with gray

color to avoid pinching with

Rear cover.

Pig tail of Carbon brush

9 mm 9 mm

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