Maktec mt817, mt818 Technical Information

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PRODUCT

CONCEPT AND MAIN APPLICATIONS

Specification

Standard equipment

Optional accessories

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

Model No.

Description

MT817, MT818

Hammer Drills 13mm (1/2")

Models MT817 and MT818 have been developed as the cosmetic change of maktec hammer drills MT811 and MT812. Their main features are:

• Industrial performance and durability at less expense

• Ergonomically designed handle with rubberized soft grip

The specification difference between these models are: MT817/ 13mm (1/2") hammer drill with Keyed chuck MT818/ 13mm (1/2") hammer drill with Keyless chuck

These models are also available with plastic carrying case as “K” models; MT817K, MT818K

110 120

230 240

4.1 50/60 50/60

50/60 50/60

3.8

2.0

1.9

430

---

430 430

220 220

340 340

340

220 50/602.1 430 220 340

340

Continuous Rating (W)

Voltage (V) Cycle (Hz)

Input Output

Max. Output (W)Current (A)

Dimensions: mm ( " )

Width (W)

Height (H)

Length (L)

Model No.

(The image above is MT817.)

MT817 MT818

255 (10) 258 (10-1/8)

193 (7-5/8)

72 (2-13/16)

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 - 2,800

Model No.

MT817

0 - 30,800

Keyed

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

13 (1/2)

18 (11/16)

Yes

Double insulation

1.8 (3.9)

2.0 (6.6)

MT818

Keyless

1.7 (3.7)

Variable speed control by trigger Yes

* with Side grip

Chuck key S-13 ................................................ 1 (MT817 only)

Key holder 10 ................................................... 1 (MT817 only)

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

Depth gauge ..................................................... 1 (for some countries)

Cap ................................................................... 1 (for some countries)

Plastic carrying case ........................................ 1 ("K models" only)

No load speed: min.

ˉ¹=rpm

Specification

ECHNICAL INFORMATION

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[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 removing Retaining ring WR12 from Spindle

1R005 Retaining ring pliers RT-2N removing Retaining ring R-32 from Gear housing

1R026 Bearing setting pipe 16-8.2 removing Spindle from Helical gear 37

1R028 Bearing setting pipe 20-12.2 assembling Helical gear 37 and Cam

[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

Gear housing 4g

a little

a little a little

Gear room where Helical gear 37 rotates

Cam portion

Hole where Steel ball 3.5 and Pin 4 are assembled

Where Ball bearing 6002DDW touches drum portion (when using in Hammer drill mode)

Cam housing complete

Spindle

Steel ball 3.5

Retaining ring WR12

Viewing from Helical gear 37 side

Retaining ring R-32

Pin 4

AmountPortion to lubricate

1R035

1R037

1R139

1R223

1R224

1R258

1R269

1R283

1R298

Bearing setting plate 15.2 holding spindle when assembling Helical gear 37

Bearing setting plate 20.2 holding Gear housing when removing Spindle

holding Gear housing cover when assembling Cam

Drill chuck extractor fixing Spindle, when Drill Chuck removing

Torque wrench shaft 20-90N.m

removing / assembling Drill chuck

removing Ball bearings

Ratchet head 12.7 (For 1R223)

V block

Bearing extractor

Round bar for arbor 9-50 removing Spindle from Helical gear 37

Hex bar 10 with square socket

Helical gear 37

Ball bearing 6002DDW

Repair

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[3] DISASSEMBLY/ASSEMBLY [3] -1. Armature

DISASSEMBLING

1. Remove Handle cover by loosening three 4x18 Tapping screws. And then, remove Carbon brushes together with Brush holders.

2. Remove three 5x25 Tapping screws. And then, twist Motor housing or Gear housing so that the edge of Motor housing can be tapped with plastic hammer to disassemble.

3. Separate Motor housing from Gear housing section by striking its edge with plastic hammer.

4x18 Tapping screw

Handle cover

Motor housing

Gear housing

Brush holder

4. Disassemble Armature from Cam housing complete by striking its edge with plastic hammer.

[3] DISASSEMBLY/ASSEMBLY [3] -1. Armature

DISASSEMBLING

1. Remove Handle cover by loosening three 4x18 Tapping screws. And then, remove Carbon brushes together with Brush holders.

2. Remove three 5x25 Tapping screws. And then, twist Motor housing or Gear housing so that the edge of Motor housing can be tapped with plastic hammer to disassemble.

3. Separate Motor housing from Gear housing section by tapping its edge with plastic hammer.

4x18 Tapping screw

Handle cover

(1) Disassemble Armature from the machine as drawn in Fig. 2.

Motor housing

Gear housing

Brush holders with Carbon brushes

4. Disassemble Armature from Cam housing complete by tapping its edge with plastic hammer.

Fig. 2

Repair

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[3] DISASSEMBLY/ASSEMBLY [3] -1. Armature (cont.)

DISASSEMBLING

[3] -2. Drill Chuck

ASSEMBLING

(2) Remove Ball bearings from Armature shaft as drawn in Fig. 3.

Assemble by reversing the disassembly procedure. Refer to Figs. 3 and 2.

1. Remove Ball bearing 608DDW with 1R269.

2. The claws of 1R269 cannot hold Ball bearing 607ZZ firmly because of the small gap between the bearing and insulation washer. So use Water pump pliers to secure the legs firmly as shown below.

Water pump pliers

Claws of 1R269

Fig. 3

Ball bearing 607ZZ

Insulation washer

Legs

Ball bearing 608DDW

1R269

Ball bearing 607ZZ

Repair

DISASSEMBLING

1. Attach 1R224 to 1R223.

2. Attach 1R298 to R224.

(1) Arrange the repairing tools as drawn in Fig. 4.

(2) Remove 13 mm Drill chuck as drawn in Fig. 5.

Fig. 4

Fig. 5

1R224

1R223

R139

1R298

1R223

Vise

Drill chuck

1. Open the Drill chuck.

2. Fix 1R139 to Vise and set Drill chuck to the groove of 1R139.

3. Insert 1R298 into Drill chuck and turn 1R223 counterclockwise.

ASSEMBLING

Assemble by reversing the disassembly procedure. Refer to Figs. 5 and 4. Note: Set the fastening torque of 1R223 to 26.0 N.m ~ 30.10 N.m (265 Kgfcm ~ 306 Kgfcm) and turn 1R223 clockwise.

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Repair

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Retaining ring WR-12

Spindle

[3] DISASSEMBLY/ASSEMBLY

DISASSEMBLING

Fig. 6

[3] -3. Helical Gear 37 and Ball bearing 6002DDW

(1) Remove Drill chuck as drawn in Figs. 4 and 5. (2) Separate Gear housing from Motor housing. And remove Armature from Cam housing complete as drawn in Fig. 2. (3) Disassemble Helical gear 37 as drawn in Fig. 6.

1. Separate Cam housing complete from Gear housing. Take out Pin 4 and Steel ball 3.5 from the hole of Spindle so as not to lose them.

2. Remove Retaining ring WR-12 with 1R004.

Cam housing complete

Gear housing

Steel ball 3.5

Pin 4

1R004

3. Put Gear housing onto 1R037 while fitting Spindle to the hole.

Spindle

1R037

1R026

4. Put 1R026 on Spindle.

5. Press 1R026 with Arbor press so that Spindle is pushed out slightly.

6. Put 1R238 on Spindle and press 1R283 with Arbor press to remove Spindle.

7. Helical gear 37 and Spindle (with Compression spring 16) are removed from Gear housing.

8. Remove Compression spring 16 from Spindle.

1R026

Arbor press

1R283

Spindle

1R037 1R037

Helical gear 37

Ball bearing 6002DDW

Gear housing

Spindle

Compression spring 16

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Repair

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[3] DISASSEMBLY/ASSEMBLY

DISASSEMBLING

ASSEMBLING

Fig. 7

Fig. 8

[3] -3. Helical Gear 37 and Ball bearing 6002DDW (cont.)

(4) Remove Ball bearing 6002DDW as drawn in Fig. 7.

(1) Assemble Ball bearing 6002DDW to Gear housing. And then, secure it with Retaining ring R-32. Refer to Fig. 7. (2) Assemble Spindle and Helical gear 37 as drawn in Fig. 8.

1. Remove Retaining ring R-32 with 1R005.

2. Insert Spindle into Ball bearing 6002DDW to use Spindle as a jig.

3. Strike the head of the re-inserted Spindle with Plastic hammer. Then, Ball bearing 6002DDW is removed.

Ball bearing 6002DDW

Gear housing

Retaining ring R-32

Spindle

1R005

Gear housing

Compression spring 16

1. Pass Spindle through Compression spring 16 and insert the Spindle into Ball bearing 6002DDW.

2. Put Gear housing onto 1R035 while aligning the inserted Spindle head with the hole of 1R035. Set Helical gear 37 to Spindle with the Cam portion facing to Cam housing complete side.

3. Press 1R028 with Arbor press. Then, Helical gear 37 is installed on Spindle properly.

1R035

Helical gear 37

Gear housing

Spindle

1R028

Arbor press

Cam portion

(3) Assemble Retaining ring WR-12, Steel ball 3.5 and Pin 4 to Spindle. Refer to the drawing on the upper left and right in Fig. 6.

Hole of 1R035

Note: When Helical gear 37 is removed, Ball bearing 6002DDW has damage. Do not reuse the Ball bearing 6002DDW.

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Repair

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[3] DISASSEMBLY/ASSEMBLY [3] -4. Cam Housing Compete

DISASSEMBLING

ASSEMBLING

Fig. 9

Fig. 10

2. Remove Cam complete as follows: (1) Fix Cam housing to Vise. (2) Insert two slotted head screwdrivers into the cuts between Cam complete and Cam housing to remove Cam complete.

1. Remove Change lever and Lever case from Cam housing complete.

(1) Remove Drill chuck as drawn in Figs. 4 and 5. (2) Separate Gear housing from Motor housing. And remove Armature from Cam housing complete as drawn in Fig. 2. (3) Separate Cam housing complete from Gear housing. See the drawing on the upper left in Fig. 6. (4) Disassemble Cam complete as drawn in Fig. 9.

(1) Assemble Cam complete to Cam housing as drawn in Fig. 10.

(2) Assemble Lever case and Change lever. Refer to Fig. 9.

Lever case

Cam housing complete

Change lever

Cut on Cam housing complete

Cam complete

Vise

Cam housing

Center line of Cam housing

1. Set Cam complete to Cam housing with the notch of cam complete aligning with the center line on Cam housing. And then, put the Cam housing on 1R258.

2. Press 1R028 with Arbor press. This ends the assembling of Cam housing complete.

Notch

Cam complete

Cam housing

1R028

Arbor press

Cam housing complete

1R258

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Fig. D-1

Orange

White

Blue

Brown

Purple

Color index of lead wires' sheath

Switch

Chike coil

Field

Brush holder A

Brush holder B

Black

2b 1b

Noise suppressor

Power supply cord

Earth terminal (It depends on specifications.)

Viewed from commutator

Circuit diagram

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Wiring of Field lead wire

Rib C

Rib D

Rib A

Rib B

Wiring of Earth lead wire

Fig. D-2

Fig. D-3

arrow

slit

Terminal

Noise suppressor

Lead wire holders

Rib E

Rib D

1. Insert terminal of the earth lead wire (white) into the slit near the arrow showing the rotating direction.

3. Fix the lead wire (white) in Lead wire holders.

Route Field lead wire (white) between Rib A and Rib B.

Route Field lead wire (black) between Rib C and Rib D.

Route Field lead wire (white) through the groove.

Route Field lead wire (black) through Lead wire holders.

2. Route the Lead wire (white) between Rib D and Rib E.

Note: Do not route the earth lead wire (white) over the top of the cables when routing the lead wires through Lead wire holders.

Wiring diagram

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Wiring diagram

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Wiring in Handle section

Rib F Choke coil (orange)

Put Choke coil (orange) between Rib F and Rib G.

Rib G

Fig. D-4

Noise suppressor

Switch

Brush holders

Do not route the earth lead wire (white) over the top of the cables when routing the lead wires through Lead wire holders.

Put Choke coil (purple) in the position shown below.

Connect the Connecting terminals to Brush holders from the rear side.