Makita Maktec MT811 Manual

Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output(W)
220 2.0 50 / 60 430
0 - 2,800
1.5 - 13 (1/16 - 1/2)
0 - 30,800
220 340
1.9 50 / 60 430 220 340
230 / 240
Model No.
Description
PRODUCT
Current (A)
MT811
13mm (1/2") Hammer Drill
New power tool series from MAKITA
* Less expensive but service life is as long as existing
MAKITA models.
* Easy to-repair-construction
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
< Note > The standard equipment for the tool shown may differ from country to country.
P 1 / 7
Chuck ability : mm ( " )
Keyless chuck
Reverse switch
No load speed : (min -1= rpm)
Blows per min. : (min -1= bpm)
Drilling
capacity : mm ( " )
Steel
Concrete
* Chuck key S13 ............................................... 1 pc.
* Side grip ............................................... 1 pc.
Wood
Protection from electric shock
Net weight :Kg (lbs )
Cord length : m ( ft )
Yes
No
by double insulation
2.0 (6.6)
1.6 (3.5)
13 (1/2)
13 (1/2)
18 (11/16)
* Stopper pole
Dimensions : mm ( " )
Width ( W )
Height ( H )
Length ( L ) 272 (10-3/4)
194 (7-5/8)
71 (2-13/16)
W
L
H

Repair P 2 / 7
< 1 > Lubrication
Apply MAKITA grease N. No.1 to the following portions marked with black triangle to protect
parts and product from unusual abrasion.
Steel ball 3.5
Pin 4
Spindle
Gear housing Helical gear 39
Cam
Apply 3.6g of the above mentioned grease
to the gear room. Apply 0.1g of the above mentioned grease
to the steel ball and pin accepting hole.
Apply 0.1g of the above mentioned grease
to the portion contacting with helical gear 39.
< 2 > Disassembling drill chuck
<Note in assembling>
Pre-set the fastening torque of the torque wrench with 25 - 30 N.m, when assembling.
Firmly hold No.1R139 "Drill chuck extractor" with vise.And lock spindle with the drill chuck extractor.
Holding No.1R298 "hex socket" with drill chuck, and turn the hex socket with No.1R223 "Torque wrench"
anti-clockwise. So drill chuck can be disassembled from spindle. See Fig. 1.
< 3 > Assembling drill chuck
< 4 > Disassembling and assembling cam
(Disassembling)
Hold inner housing with vise.
Insert the screwdriver into the space between cam and inner housing.
Disassemble cam with the screwdriver as illustrated in Fig. 2.
Firmly hold No.1R139 "Drill chuck extractor" with vise.And lock spindle with the drill chuck extractor.
Holding No.1R298 "hex socket" with drill chuck, and turn the hex socket with No.1R223 "Torque wrench"
clockwise. So drill chuck can be assembled to spindle. See Fig. 1.
No.1R298 Hex socket
No.1R223
Torque wrench
No.1R224 Ratchet head
1R139 Drill chuck extractor
Fig. 1
Fig. 2 Fig. 3
(Assembling)
Assemble cam by pressing with arbor press as illustrated in Fig. 3.
Inner housing Inner housing
Cam
Cam

Repair P 3 / 7
< 5 > Disassembling helical gear 39 See Fig. 4.
1. Take off retaining ring S12, pin 4 and steel ball 3.5 from spindle.
2. Set gear housing on No.1R037 "Bearing setting plate", and set No.1R284 "Round bar for arbor" on spindle.
3. Disassemble spindle by pressing the round bar for arbor set on spindle, with arbor press.
Then, helical gear 39 can be removed form gear housing.
< 6 > Assembling helical gear 39 See Fig. 5.
1. Assemble spindle by pressing with arbor press.
2. Assemble helical gear 39 to spindle by pressing 1R028 "Bearing setting pipe" on the helical gear, with arbor press.
3. Fix helical gear 39 with retaining ring S12, and put steel ball 3.5 and pin 4 into the hole of spindle.
Fig. 4
Fig. 5
Retaining ring S12
Steel ball 3.5
Pin 4
Spindle Spindle
<Note>
Be careful, not to lose pin 4,
steel ball 3.5 and retaining
ring S12, when removing them.
No.1R284
Round bar for arbor
No.1R037
Bearing setting plate
Arbor press
Spindle
Helical gear 39
Spindle
No.1R284
Round bar for arbor
Gear housing
Arbor press
1R035
Bearing setting plate
1R028
Bearing setting pipe
Helical gear 39 Retaining ring S12
Steel ball 3.5
Pin 4
Spindle

Circuit diagram P 4 / 7
Color index of lead wires
Black
White
Red
Orange
Purple
A
B
Black
or brown White
or blue
1a 1b 2b
2a
1
2
4
6
3
5
Noise
suppressor
Switch
A side
Switch
B side
Brush
holders Field
P 5 /
Insulated
terminal
Choke coil
Choke coil
Switch

Wiring diagram P 5 / 7
Wiring diagram of field lead wires
Field lead wire (red)
Field lead
wire (white)
Field lead
wire (black)
Switch
Switch
Rib B
Rib C
Rib A
Rib E
Rib D
Rib F
Put the insulated terminal
into the space illustrated below.
Boss A
64
Pass field lead wire (red)
between rib B and rib C
as illustrated below.
Be careful, not to pinch
the lead wires connected with
switch terminal 4 and 6, with boss A.
Pass field lead wire (black)
between rib D and rib E.
Pass field lead wire
(white) between rib A
and rib B.
Polyethylene tube
Pass field lead wire
(red) between rib E
and rib F.
Wiring diagram of lower portion
of switch
Noise
suppressor

Wiring diagram P 6 / 7
Wiring diagram of wires connected with brush holders ( With choke coil)
Rib E
Rib F
Boss A
Polyethylene tube
Be careful, not to pinch
the lead wires connected with
switch terminal 4 and 6, with boss A.
Brush holder
Brush holder
Receptacle
Receptacle
Switch
Switch
Fig. A
Upper
Lower
Inflect the receptacles as illustrated in Fig. A.
The receptacle of lower brush holder side has
to be so inflected, that it does not cross the line of .
Choke coil
(orange)
Choke coil
(purple)
Noise suppressor's
lead wire (white)
Pass noise suppressor's lead wire (white)
and choke coil lead wire (orange)
between rib E and rib F.
Lead wire (purple)
Pass noise suppressor's lead wire (white)
and choke coil lead wire (orange)
between rib E and rib F.
64
Switch
Wiring diagram of lower portion
of switch
Noise
suppressor

Wiring diagram P 7 / 7
Wiring diagram of wires connected with brush holders ( Without choke coil)
64
Polyethylene tube
Rib E
Rib F
Boss A
Be careful, not to pinch
the lead wires connected with
switch terminal 4 and 6, with boss A.
Brush holder
Brush holder
Receptacle
Switch
Fig. B
Upper
Lower
Receptacle
Inflect the receptacles as illustrated in Fig. B.
The receptacle of lower brush holder has
to be so inflected, that it does not cross the line of .
Pass noise suppressor's lead wire (white)
and lead wire (orange) between rib E
and rib F.
Lead wire
(purple)
Switch
Wiring diagram of lower portion
of switch
Noise
suppressor