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[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

/ 1

2

R

epair

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

10

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

Summary of Contents for BHP448

Page 1: ...ng variations PRODUCT Housing color BHP448RFE DC18RC Model No Type Quantity Charger Plastic carrying case Battery cover Yes 2 Battery BL1430 1 No No No No No BHP448Z Makita blue BHP448RFE3 DC18RC Yes...

Page 2: ...h 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...

Page 3: ...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...

Page 4: ...essed by the lever of Gear assembly Drill chuck side Motor 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 lev...

Page 5: ...rew 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 Spee...

Page 6: ...sion 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 pi...

Page 7: ...ve 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 Bru...

Page 8: ...ousing 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 comple...

Page 9: ...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 Swi...

Page 10: ...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...

Page 11: ...D Switch Terminal Fig D 2A Fig D 1A LED Wire connecting portion Fix the LED lead wires with Lead wire holders drawn below Wiring of LED Lead Wires before setting Switch Wiring to Terminal Lead wire ho...

Page 12: ...ire holder yellow blue black Switch trigger FET Fig D 4A Fig D 5A Wiring in Housing set L Seal Put the bundled Lead wires into the groove of Sponge Pay attention not to put Lead wires on the Seal Lead...

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