Makita 4112S Manuel

Model No.

Description

PRODUCT

CONCEPT AND MAIN APPLICATIONS

P 1 / 6

Specification

Standard equipment

Optional accessories

Continuous Rating (W)

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

230

No load speed: min.-1= rpm

Wheel size: mm (")

Clutch

Soft start

Box wrench 17 ................................... 1 pc.

Plastic carrying case ........................... 1 pc.

Diameter

Hole diameter

11 50 / 60 2,400 1,600 3,700

Current (A)

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 648 (25-1/2)

240 (9-1/2)

273 (10-3/4)

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

3,500

305 (12)

Yes

(SJS - Super Joint System)

Yes

25.4 (1)

Thickness 2.6 (3/32)

Protection against electric shock Double insulation

Cord length: m (ft) 2.5 (8.2)

Net weight*: kg (lbs) 10.3 (22.7)

*Without wheel and cord

Assorted diamond wheels

Assorted abrasive cut off wheels

Base set

Elbow joint 32 (for connecting to vacuum cleaner)

Plastic carrying case

Ring 20

4112S

Angle Cutter 305mm (12")

TECHNICAL INFORMATION

The above product is the low speed-high torque version

of the current Model 4112HS, having the main benefits

as follows;

"SJS - Super Joint System" that provides smooth

approach and long service life of gear section

Soft start to minimize startup shock

P 2 / 6

Repair

[2] LUBRICATION

Apply Makita grease N. No.1 to the following portions designated by black triangle to protect

parts and product from unusual abrasion.

Bearing extractor, small (No.1R269), Retaining ring S and R pliers (No.1R291), Water pump pliers (commercial one)

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Removing Base and Wheel Cover

Fig. 1

Fig. 2 Fig. 3

[1] NECESSARY REPAIRING TOOLS

CAUTION: Remove the wheel from the machine for safety before repair/ maintenance !

Amount to apply

Spindle17

Lock spring 2426

The surface that contacts Spiral bevel gear 48

Outside surface

Gear housing32

1) Remove Base by unscrewing an M8x20 Wing bolt and two M6 Shoulder hex bolts. (Fig. 2)

2) Remove Pressure plate by unscrewing three M5x14 Hex bolts. (Fig. 3)

Gear room

approx. 1g

approx. 40g

Pressure plate

Hex bolt M5x14

(3pcs)

Item No. Description Portion to lubricate

Fig. 4

3) By removing two M8x20 Hex bolts, the Wheel cover section can now be removed. (Fig. 4)

Note: Be careful not to lose Plate B.

Spiral bevel gear 57

Shoulder hex bolt M6 (2pcs) Base

Spring washer 8

Flat washer 8

Wing bolt M8x20

Hex bolt M8x20 (2pcs)

Plate B

P 3 / 6

Repair

Fig. 5 Fig. 6 Fig. 7

[3] -2. Disassembling/ Assembling Gear Section and SJS (Clutch) Mechanism

Retaining ring S-15

Flat washer 15

1) Remove the Gear section by unscrewing four M5x14 Hex bolts. See Fig. 5.

2) Remove Ball bearing 6000LLB using Ball bearing extractor, small (No.1R269). (Fig. 6)

3) After removing Retaining ring S-15 with Retaining ring S and R pliers (No.1R291), remove Flat washer 15. (Fig. 7)

4) See Fig. 8. Remove Spindle by pressing down from the Spiral bevel gear installation side with arbor press and Round

bar for arbor: Use a Round bar of 14mm or smaller.

Important: Be careful not to damage the Labyrinth ring 25 of Spindle in this step.

5) Remove the assembly of Spiral bevel gear 57 and Lock sleeve from Bearing box. (Fig. 9)

Fig. 8 Fig. 9

6) Lock sleeve can be separated from Spiral bevel gear 57 by pulling the gear while turning Lock sleeve clockwise with

water pump pliers or the like. (Fig. 10)

7) Lock spring 24 can be separated from Spiral bevel gear 57 by pulling the gear while turning Lock spring 24 clockwise

with water pump pliers or the like. (Fig. 11)

Important: Wrap Lock spring 24 with soft cloth or the like in order not to damage with the pliers.

Water pump pliers Water pump pliersLock sleeve

Fig. 10

Lock spring 24

Fig. 11

Soft cloth

Hex bolt M5x14 (4pcs)

Gear section

No.1R269

Ball bearing 6000LLB

No.1R291

Round bar for arbor

Spindle

Spiral bevel gear 57

Lock sleeve

Labyrinth ring 25 Bearing box

Spiral bevel gear 57Spiral bevel gear 57

DISASSEMBLING

P 4 / 6

Repair

Fig. 12 Fig. 13

[3] -2. Disassembling/ Assembling Gear Section and SJS (Clutch) Mechanism

1) When assembling Lock spring 24 to Spiral bevel gear 57, first apply Makita grease SG. No.0 to the spring.

2) Then tilt and place Lock spring 24 on Spiral bevel gear 57, and press down the portion A (the highest portion) of

the spring using arbor press. As turning the gear counterclockwise, press down the portions B, C, D sequentially.

After one turn of of the gear, the top surface of the spring will be almost flat. Lock spring 24 can now be fit on

Spiral bevel gear 57 by pressing down the entire top surface of the spring. (Fig. 12)

3) Assemble Lock sleeve to Spiral bevel gear 57 the same way as you did to install Lock spring 24. (Fig. 13)

4) Then do the reverse of the disassembling steps.

ASSEMBLING

Lock spring 24

Spiral bevel

gear 57

Arbor press

Lock sleeve

[3] -3. Replacing Armature

1) Separate Base and Wheel cover. (Refer to [3] -1.)

2) After removing Brush holder cap and Carbon brush, separate the Gear housing section from Motor housing

by unscrewing four M5x40 Hex bolts.

3) Armature can now be removed from Gear housing by tapping the end surface of Gear housing with plastic hammer.

Ball bearing 6202DDW still remains in Gear housing in this step.

4) In order to remove Ball bearing 6202DDW;

Remove Retaining ring R-40 and Flat washer 30, and insert the removed Armature lightly into the ball bearing again.

Then pull out the ball bearing with the inserted armature while swaying the commutator end of the armature. (Fig. 14)

5) When fastening the Gear housing section to Motor housing, tighten four M5x40 Hex bolts to the recommended

torque of 7.4 - 15Nm.

Fig. 14

Flat washer 30

Retaining ring R-40

Ball bearing 6202DDW

Ball bearing

6202DDW

P 5 / 6

Circuit diagram

Wiring diagram

Color index of lead wires

Black

White

Orange

Purple

Route the following lead

wires through the hook:

* Field lead wire (black)

* Field lead wire (orange)

Route the following lead

wires through the hook:

* Field lead wire (black)

* Field lead wire (purple)

* Connecting lead wire

(orange) from Brush holder

[1] Wiring in Motor Housing

Insulated receptacle

Soft start

circuit

Noise

suppressor Insulated

connector

Insulated

connector

Switch

Field

Brush holder

(left) Brush holder

(right)

Line filter

Brush holder

(left)

Brush holder

(right)

Power supply cord

red or orange

Field lead wire (purple)

Field lead wire (orange)

Field lead wire (black)

Connecting lead wire (purple)

from Brush holder

Connecting lead wire (orange)

from Brush holder

Hook

P 6 / 6

Wiring diagram

[2] Wiring in Handle

Be sure to connect so that all slits

of the four Insulated receptacles

face the same direction as illustrated

below.

Insulated receptacle

(viewed from the wheel installation side)

Terminal of Switch

Terminal

Slit in Terminal

Insulator

Switch Insulated receptacle

Connecting Insulated Receptacles

with Terminals of Switch

Fix the following lead wires

with this lead wire holder:

*2 Field lead wires (black)

*Lead wire of Soft start circuit (white)

*Lead wire of Soft start circuit (orange or red)

Rib

Be careful not to route

the lead wires of Power

supply cord over this rib.

If Line filter is used,

route two Field lead

wires (black) through it,

and put in this space.

Fix the following lead wires with this lead

wire holder, and put in this space:

*2 Field lead wires (purple, orange)

*2 Connecting lead wires (purple, orange)

from Brush holder

Put Soft start circuit

in this space.

Put Noise suppressor

in this space if used.

Switch

[Correct] [Wrong]

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