Makita MT80A Manual

PRODUCT

CONCEPT AND MAIN APPLICATIONS

P 1/ 12

Specification

Standard equipment

Optional accessories

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

Model No.

Description

MT80A, MT80B

Hammer Drills 10mm (3/8"), 16mm (5/8")

Models MT80A/ MT80B have been developed as maktec brand

hammer drills 10mm (3/8")/ 16mm (5/8"), mainly for the emerging

countries.

New maktec design is employed to eliminate white printing and

polygonal line from maktec logo/ elastomer from handle for the cost

effectiveness.

Depth gauge

230

240

50/60

2.3

2.2

500

250

350

220 50/602.4 500 250 350

350

Continuous Rating (W)

Voltage (V) Cycle (Hz) Input Output Max. Output (W)Current (A)

Dimensions: mm ( " )

Width (W)

Height (H)

Length (L) 262 (10-3/8)

MT80B

254 (10)

MT80A

196 (7-3/4)

70 (2-3/4)

Chuck capacity: mm (")

Chuck type

Reverse switch

Impacts per min.: min.ˉ¹= ipm

Capacities: mm (") Steel

Concrete

Wood

Protection against electric shock

Power supply cord: m (ft)

Weight according to

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

0 - 2,900

Model No. MT80B

0 - 43,500

Keyed

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

16 (5/8)

13 (1/2)

20 (13/16)

Yes

Double insulation

1.7 (3.7)

2.0 (6.6)

Variable speed control by trigger Yes

0 - 2,900

MT80A

0 - 43,500

Keyed

1.5 - 10 (1/16 - 3/8)

10 (3/8)

20 (13/16)

Yes

Double insulation

1.6 (3.4)

2.0 (6.6)

Yes

*with Side grip

Chuck key S10 (MT80A) ........................................ 1

Chuck key S13 (MT80B) ........................................ 1

Key holder 10 .......................................................... 1 (for some countries only)

Side grip .................................................................. 1

Plastic carrying case (MT80B) ............................... 1 (for “K model” only)

No load speed: min.ˉ¹=rpm

Specification

TECHNICAL INFORMATION

P 2/ 12

Repair

[1] NECESSARY REPAIRING TOOLS

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

Code No. Description Use for

1R004 Retaining ring pliers ST-2

Ratchet head 12.7 (for 1R223)

1/4” Hex. shank bit for M8

removing / mounting Ring spring 13

1R029

1R031

1R139

1R165

1R223

1R224

1R231

1R258

1R278

1R298

Bearing setting pipe 23-15.2 assembling Helical gear 39 to Spindle

Bearing setting pipe 28-20.2 assembling Cam complete to Cam holder

fixing Spindle when removing / mounting Drill chuck

holding Helical gear 39 when separating Spindle from Helical gear 39

holding Cam holder when disassembling/ assembling Cam complete

removing / assembling

Drill chucks

for both 10 mm and 13 mm Drill chucks

for 13 mm Drill chuck

for 10 mm Drill chuck

[2] LUBRICATION

Apply Makita grease N. No.2 to the following portions designated with the black triangle to protect parts and product

from unusual abrasion.

Fig. 1

Item No. Description

Spindle a little

a little

3.0g

1.7g

a little

a: Drum portion for smooth hammering in the inner ring

of Ball bearing 6002LLB

b: Spindle end where 10 Steel ball 5 contacts

Steel ball 5

Change lever accepting hole for 10 Steel ball 5

Helical gear 39 c: Teeth portion for smooth engaging with Armature’s gear

d: Cam portion for smooth engaging with Cam on Cam holder complete

Whole portion

AmountPortion to lubricate

Ball bearing 6002LLB

Compression spring 16

Ring spring 13

Armature

Cam holder

complete

Drill chuck extractor

Ring spring setting tool B

Torque wrench shaft 20-90N·m

Round bar for arbor 4-50

Hex bar 10 with square socket

V block

disassembling Cam complete from Cam holder

P 3/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -1A. 13mm Drill Chuck of model MT80B

DISASSEMBLING

Remove 13mm Drill chuck as drawn in Fig. 2A.

Remove 10mm Drill chuck as drawn in Fig. 2B.

1. Fix 1R139 firmly with vise. Then attach 1R298 to

13mm Drill chuck, and then fix the machine to 1R139

by fitting the flat portion of Spindle to the groove of 1R139.

2. Attach 1R224 to 1R223 and set them to 1R298.

3. Turn 1R223 counter clockwise to remove

13mm Drill chuck from the machine.

1R139

1R298

1R224

1R223

Fig. 2A

Fig. 2B

[3] -1B. 10mm Drill Chuck of model MT80A

1R139

1R224

1R231

Bit adapter

1R223

1. Fix 1R139 firmly with vise. Then attach 1R231 and Bit adapter

to 10mm Drill chuck, and then fix the machine to 1R139

by fitting the flat portion of Spindle to the groove of 1R139.

2. Attach 1R224 to 1R223 and set them Bit adapter.

3. Turn 1R223 counter clockwise

to remove 10mm Drill chuck

from the machine.

P 4/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -1A. 13mm Drill Chuck of model MT80B (cont.)

-1B. 10mm Drill Chuck of model MT80A (cont.)

ASSEMBLING

[3] -2. Helical Gear 39, Ball Bearing 6002LLB

DISASSEMBLING

Assemble by reversing the disassembly procedure. Refer to Fig. 2A or Fig. 2B.

Note: Set the fastening torque of 1R223 to 24.5N·m ~ 29.4 N·m (250 Kg f·cm ~ 300 Kg f·cm) and turn 1R223 clockwise.

(1) Remove Drill chuck as drawn in Fig. 2A or Fig. 2B.

(2) Remove Spindle section from the machine as illustrated in Fig. 3.

Fig. 3

3. Shift Change lever to Hammer

drill mode

1. Shift Change lever to Drill mode. 2. Remove Housing (R) by loosening seven 4x18 Tapping screws.

4. Hold Spindle and Change lever by hand, then Lift up Spindle

and Change lever while turning them counter clockwise

viewing them from Drill chuck side.

5. Pull off the Spindle section (Spindle, Ball bearing 6002LLB,

Compression spring 16) from Cam holder complete.

Change lever

Cam holder complete

Housing (R)

4x18 Tapping screw

(7 pcs.)

Change lever

Spindle Change

lever

Spindle section

P 5/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Helical Gear 39, Ball Bearing 6002LLB (cont.)

DISASSEMBLING

(3) Disassemble the removed Spindle section as drawn in Fig. 4.

ASSEMBLING

(1) Assemble Compression spring 16 and Ball bearing 6002LLB to Spindle. And secure them with Ring spring 13.

(Refer to the lower two illustrations in Fig. 4.)

Note: Apply a little amount of Makita grease N. No.2 to Drum portion of Spindle and in the inner ring the bearing.

(Refer to [2] LUBRICATION.)

(2) Assemble Helical gear 39 to Spindle as drawn in Fig. 5.

Fig. 4

3. Ball bearing 6002LLB and Compression spring 16 are secured to Spindle with Ring spring 13.

Remove Ring spring 13 with 1R004. Now, Ball bearing 6002LLB and Compression spring 16

are removed from Spindle.

1. Put the removed Spindle section onto

1R165 to support Helical gear 39.

2. Remove Helical gear 39 by pressing the Spindle end

with Arbor press.

Spindle

1R029

1R165 1R165

Helical gear 39

Spindle Helical gear 39

Spindle end

Ring spring 13 1R004

Ball bearing 6002LLB

Ball bearing

6002LLB

Cam portion

1. Set the Spindle section to 1R139. 2. Apply 1R029 to Helical gear 39, and press 1R029 with Arbor press

to assemble the gear to the Spindle section.

Note: Face the cam portion of Helical gear 39 to the opposite side

to Ball bearing 6002LLB

Compression spring 16

Fig. 5

P 6/ 12

Repair

[3] -3. Cam Complete, Change Lever

ASSEMBLING

DISASSEMBLING

(3) Mount the assembled Spindle section to the machine as drawn in Fig. 6.

Fig. 6

Fig. 7

1. Assemble the Spindle section to Cam holder complete. 2. Shift Change lever to Hammer drill mode.

Change lever

3. Hold Spindle and Change lever by hand, and put them

to housing (L) while turning them clockwise viewing

from Drill chuck side.

4. Shift Change lever to Drill mode.

And assemble Housing (R).

Cam holder complete

Spindle Change

lever

Spindle section

Housing (L)

(1) Shift Change lever to Drill mode, and separate Housing (R) from Housing (L) by unscrewing seven 4x18 Tapping

screws. (See the upper two illustrations in Fig. 3.)

(2) Shift Change lever back to Hammer drill mode, and remove the Spindle section from Cam holder complete.

(See the lower illustrations in Fig. 3.)

(3) Disassemble Cam holder complete as drawn in Fig. 7.

Cam holder

complete

Cam holder

complete

Change lever

Steel ball 5

1. Remove Cam holder complete together with

Change lever from Armature.

2. Separate Change lever, Steel ball 5 and Plate 19

from Cam holder complete.

Plate 19

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Helical Gear 39, Ball Bearing 6002LLB (cont.)

P 7/ 12

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -3. Cam Complete, Change Lever (cont.)

ASSEMBLING

(1) Cam complete can be assembled to Cam holder complete as drawn in Fig. 9.

DISASSEMBLING

(4) Disassemble Cam complete from Cam holder as drawn in Fig. 8.

Fig. 8

Fig. 9

Cam complete

Cam holder

Notch

1R031

Small square mark

1R278

1R258 1R258

Put Cam holder complete onto 1R258, and set 2 pcs. of 1R278 to the holes of Cam holder complete.

And then press 2 pcs. of 1R278 with Arbor press to disassemble Cam complete from Cam holder.

Cam complete

Cam holder

1. Set Cam complete to Cam holder while

aligning the notch of Cam complete

to the small square mark on Cam holder.

2. Put Cam holder with Cam complete onto 2 pcs. of 1R258.

And apply 1R031 to Cam complete, and then press 1R031

with Arbor press.

Cam complete

Cam holder

complete

1R258 1R258

P 8/ 12

Repair

(2) Assemble Change lever to Cam holder complete as drawn in Fig. 10.

(3) Assemble Cam holder compete to Armature by reversing the Disassembly procedure.

(Refer to the left illustration in Fig. 7.)

ASSEMBLING

Fig. 10

Groove for

fitting Plate 19 Plate 19

1. Assemble Plate 19 to Cam holder complete by fitting it

to the groove in Cam holder complete.

Steel ball 5

2. Apply a little amount of Makita grease

N No.2 to Change lever at the portion

designated with black triangle.

And mount Steel ball 5 to Change lever.

Projection Projection

Groove

Change lever

Cam side of

Cam holder complete

Change lever

3. Assemble Change lever to Cam holder complete as drawn below.

Note: Fit Projection of the lever to the groove of Cam holder complete

when assembling them.

[3] DISASSEMBLY/ASSEMBLY

[3] -3. Cam Complete, Change Lever (cont.)

Circuit diagram

P 9/ 12

White

Note:

Brush holder A: Change lever side

Brush holder B: Switch side

Color index of lead wires' sheath

Black

Red

Orange

Purple

Areas where suppression of radio interference is required

Fig. D-1

Brush holder A

Top

Top view

Left

Left side

view

Brush holder B

Choke coil

(purple)

Choke coil

(orange)

Field

Power supply cord

Switch Switch

Noise

suppressor

Blue lead wire is used

for some countries.

Brown lead wire is used

for some countries.

Switch

Wiring diagram

P 10/ 12

Wiring in Housing set (L)

Areas where suppression of radio interference is required

Setting of Brush holders

Fig. D-2

Brush holder

Rib A

Rib B

Housing (L)

Put Brush holders as drawn below so that the Lead wires

can be connected to them approaching from rear side.

Switch

Change lever side

Window of

Brush holder

While facing the window of Brush holder

to Housing (L) side, put it in the position

of Change lever side.

While facing the window of Brush holder

to Housing (R) side, put it in the position

of Switch side.

Power supply cord

Noise suppressor

Put Choke coil (purple) in the position

shown below.

Put Choke coil (orange)

in the position

shown in the right.

Fix Field lead wires (black)

with this Lead wire holder.

Put Field lead wires and

Power supply cord (brown

or black) between Rib A

and Rib B.

Put Noise suppressor

in the position

shown in the right.

Put Field lead wires (black, white)

under Brush holder.

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