Makita BHR242, BHR243 User Manual

ECHNICAL INFORMATION

Models No.

Description

BHR242 (LXRH01*1), BHR243 (LXRH02*1)

Cordless Combination Hammer 24mm (15/16")

*1 Model number for North and Central American countries.

CONCEPT AND MAIN APPLICATIONS

The subject models are 24mm (15/16") Cordless Combination Hammers powered by 18V Li-ion Battery, featuring:

• Efficient Brushless DC motor provides higher productivity than that of

18V Cordless Combination Hammer model BHR202.

• Able to drill in concrete as fast or faster than 24V Cordless Combination

Hammer model BHR200.

• 3 operation modes (rotation only/ rotation with hammering/ hammering only)

• Quick change drill chuck for models BHR243 (LXRH02*

• Makita’s first Cordless Combination Hammers with Dust extraction system.

Note: • These products are not compatible with 1.3Ah battery BL1815.

DX01, DX02

These are the accessories as Makita’s first Dust extracting system exclusively

for model BHR242 (LXRH01*1), BHR243 (LXRH02*1).

This system is designed to collect dust effectively with on-off operation of the tool’s on-off trigger switch interlocked with this system.

Note: • This system can be applied for concrete drilling only and comes with Dust case, Filter and 5 pcs. of extra Sealing caps.

• The following parts are available optionally:

Dust case set, Filter set, Plastic carrying case (can be stored with BHR242 or BHR243)

For Model and its Chuck systemDust extraction system

DX01

BHR242 (LXRH01*1) BHR243 (LXRH02*

Quick change chuckDX02

Specification

Model

Voltage: V

Cell

Battery

Capacity: mm (")

No load speed: (min

Chuck capacity: mm (")

Bit shank

Quick change drill chuck No Yes

Operation mode

Variable speed control by switch trigger

Reverse switch

Clutch (Torque limiter) Weight of Dust

extracting system: kg (lbs) Weight according to EPTA-

Procedure 01/2003: kg (lbs) *2: for North and Central American countries only

Capacity: Ah

Energy capacity: W

Charging time: min.

Concrete

Steel

Wood

-1= rpm)

-1)

BHR242

(LXRH01*

22 with DC18RC (DC18RA*

(Rotation only/ Rotation with Hammering/

Li-ion

3.0

24 (15/16)

13 (1/2)

27 (1-1/16)

0 - 950

0 - 4,700Blows per min.: (bpm=min

10 (3/8)

Adapted for SDS-PLUS

3 modes

Hammering only)

Yes

YesConstant speed control Yes

Yes

1.3 (3.0) for DX01,

1.4 (3.0) for DX02

1) only

Normal chuck

BHR243

(LXRH02*1)

3.4 (7.6)3.3 (7.2)

PRODUCT

P 1/ 25

Dimensions: mm (")

Length (L)

Width (W)

Height (H)

Length (L)

Width (W) 88 (3-1/2)

Height (H)

BHR242

BHR243

Dimensions: mm (")

DX01

DX02

328(12-7/8)

353(13-7/8)

85 (3-3/8)

213 (8-3/8)

372(14-5/8)

397(15-5/8)

287 (11-1/4)

Standard equipment

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

Depth gauge (Stopper pole) .............. 1

Plastic carrying case

Quick change drill chuck set

for BHR243 (LXRH02*1) only ....... 1

Note: The standard equipment for the tool

shown above may vary by country.

......................... 1

Optional accessories

SDS-PLUS bits, Taper shank T.C.T bits, Taper shank adapter, Cotter, Center bit, Core bit adapter, Drill chuck assembly, Chuck adapter, Drill chuck S13, Chuck key S13, Keyless drill chuck,

Tool holder set, Dust cup 5 & 9, Dust cup set, Bull point, Cold chisel,

Grooving chisel, Scaling chisel, Scraper assembly, Grease vessel 30g, Blow out bulb, Safety goggles,

Bit grease, Plastic carrying case, Battery BL1830,

Fast charger; DC18RA*2, DC18RC, Charger; DC18SC, DC24SC, Automotive charger DC18SE, Dust extraction system (DX01, DX02)

Repair

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

[1] NECESSARY REPAIRING TOOLS

DescriptionCode No. Use for

Retaining ring pliers ST-2N1R003 removing Ring spring 19 from Tool holder complete/ Tool holder guide complete

Retaining ring pliers ST-21R004

Drill chuck extractor1R139 removing Spiral bevel gear 32

Ring spring setting tool A1R164 assembling Oil seal 25 to Gear housing complete

T-type hex wrench 3-1271R170 removing M4 hex socket head bolts

Tip for Retaining ring pliers1R212 attachment of 1R003

1/4" hex shank bit for M41R228 removing M4 hex socket head bolts (if the bolt head damages.)

Pipe 301R232 assembling Oil seal 25 to Gear housing complete

Round bar for arbor 30-1001R252 removing Oil seal 25 from Gear housing complete

V block1R258 assembling Oil seal 25 to Gear housing complete

Bearing extractor1R269 removing Ball bearing 626DDW

Ring spring 26 setting tool B1R273 assembling Cup sleeve / Ball bearing 6806LLU to Gear housing complete

Round bar for arbor 7-501R281 removing Spiral bevel gear 32

1R356 removing Ball bearings from Rotor

1R369 removing / assembling Spiro lock washer 30

Bearing plate 10mm for arbor press

Jig for Spiro lock washer for spring type models

Ring spring extractor1R388 removing Ring spring 28

removing Retaining ring 21 for BHR243 from Armature shaft

assembling Ring 8Bearing setting plate 10.21R033

assembling Cam shaftBearing setting plate 15.21R035

removing / assembling Spiro lock washer 30Gear extractor (large)1R045

P 2/ 25

Repair

[2] LUBRICATION

Apply the following grease to protect parts and product from unusual abrasion.

Item No. Description Portion to lubricate Lubricant

Striker

O ring 17.5 Whole surface

Piston cylinder

Guide plate Inside that contacts 50 Piston joint

Piston joint Grooves that contact 49 Guide plate

Compression spring14End to be fixed to the boss in Inner housing complete

Spur gear 10 Gear portion that engages with Spur gear 51

56 57

Clutch cam A

58 Cam shaft

Swash bearing 10

Spiral bevel gear 32

Flat fillister HD pin 6

74 76

Weight holder guide

75 Counter weight

Spiral bevel gear 11

complete

Whole surface of projection

(a) Inside where Striker moves (b) Outside that contacts Tool holder (guide) complete

(See Fig. 3.)

Gear portion that engages with 58 Cam shaft

(d) Portion to be inserted into 59 Swash bearing 10

(e) Cylindrical portion to be inserted into 56 Spur gear 10

(f) Pole portion to be inserted into 50 Piston joint

(g) Ball bearing portion

(h) Inside of hole Gear portion that engages with Armature shaft gear

Portion that contacts the hinge of Inner housing complete

Gear portion that engages with 60 Spiral bevel gear 32

[in the room of Inner housing complete for Spiral bevel gear 32]

Makita grease RB No.00

and

Molybdenum disulfide

Makita grease RB No.00

Makita Grease FA No. 2

P 3/ 25

Amount

a little

See

Fig. 3.

a little

Fig. 1

47 48

(a)

Transmission parts

(b)

(e)

50 51

(f)

(g)

(h)

Counterweight section

hinge of Inner housing complete

Repair

[2] LUBRICATION (cont.)

Apply the following grease/ oil to protect parts and product from unusual abrasion.

Item No.

BHR242 BHR243

105

108 114 Steel ball 6 Entire surface

118 Steel ball 5.0 Entire surface

109

Description Portion to lubricate Lubricant Amount

Cap 35

Lip portion where Bit is to be inserted Rubber washer 16 Inner periphery Ring 21 Inner periphery Stopper Inner periphery

(a) Oil seal 25 in Gear housing complete Gear housing complete

(b) Inside where Swash bearing section rotates

(See Fig. 3.) O ring 21

Entire surface

Push corn25 Outer surface

(d) Surface where Clutch portion of 30 Tool

holder (guide) complete contacts

Steel ball 7.0

Tool holder complete

Tool holderguide complete

Sleeve 9B Washer 1041

O ring 944

Entire surface

Inside where 48 Piston cylinder reciprocates

Inside where Impact bolt A/ B reciprocates

Entire surface

P 4/ 25

Makita grease RB No.00

a little

Makita lubricating oil VG100

Makita grease RB No.00

a little

Fig. 2

Fig. 3

Quick change drill chuck: Apply Makita grease RB No. 00 to two Steel balls 6 and one Steel ball 5.

(a)

Steel ball 5

Steel ball 6

(2 pcs.)

(b)

105

BHR242

(c)

108

109

(d)

BHR243

114

Impact bolt A

118

Impact bolt B

Cross section around Swash bearing 10

boss for fixing Compression spring 14

Inside view of Inner housing

Put 16g Makita grease RB No 00 by using the space (designated by the black dot) to lubricate Swash bearing section and Cam shaft section.

Repair

[3] DISASSEMBLY/ASSEMBLY [3] -1A. Bit holder section for BHR242

DISASSEMBLING for BHR242

Fig. 4

(1) Remove Cap 35. (2) Separate Ring spring 14 from the groove of Tool holder complete using 1R003 with 1R212. (Fig. 4) Washer 16 on Ring spring 15 is removed. (3) Remove Ring spring 15 in the same way while pressing down Chuck cover. (Fig. 5) Then pick up Flat washer 17 and Rubber washer 16 from the space between Chuck cover and Tool holder complete. Chuck cover is removed. (4) Remove two Steel balls 7.0 while pressing down Ring 21. (Fig. 6) Ring 21, Guide washer and Conical compression spring 21-29 are removed.

Cap 35

Chuck cover

P 5/ 25

1R003

1R212

Ring spring 14 (black)

Groove of Tool holder complete

Fig. 5

Ring spring 15 (silver)

Chuck cover

ASSEMBLING

Assemble by reversing the disassembly procedure. Refer to Fig. 7 for the directions of the components.

Fig. 7

Ring spring 14 (black)

Flat washer 17

Ring spring 15 (silver)

Flat washer 17 Rubber

Fig. 6

Steel ball 7.0

(2 pcs.)

washer 16

Ring 21

Guide washer

Conical compression spring 21-29

Chuck coverCap 35

flat side

Steel ball

7.0 (2 pcs.)

Conical compression spring 21-29

Tool holder complete

chamfered portion

Ring 21

concave side

Guide washerWasher 16

convex side

P 6/ 25

Repair

[3] DISASSEMBLY/ASSEMBLY [3] -1B. Holder section for BHR243

DISASSEMBLING

(1) Remove Tool holder set from Tool holder guide complete. (Fig. 8) (2) Remove Cap 35, then separate Ring spring 19 from the groove of Tool holder using 1R003 with 1R212. (Fig. 9) (3) Remove Chuck cover, then remove Steel ball 7.0 while pressing down Stopper. (Fig. 10) Stopper, Guide washer, Conical compression spring 21-29 and Flat washer 21 are removed. (Fig. 11) (4) Remove Ring spring 21 with 1R004 from Tool holder guide complete side. Flat washer 24, Leaf spring and Steel ball 5 are removed. (Fig. 12) (5) Remove two Steel balls 6, Torsion spring 31 and Change ring from Tool holder. (Fig. 13)

Fig. 8

Tool holder set

Tool holder guide complete

Fig. 11 Fig. 13Fig. 12

Stopper

Guide washer

Conical compression spring 21-29

Flat washer 21

Fig. 9 Fig. 10

Ring spring 21

Flat washer 24

Leaf spring

Steel ball 5

Cap 35

Chuck cover

Tool holder set

1R003

1R212

Ring spring 19

Groove of Tool holder

Tool holder guide complete side

Chuck cover

Stopper

Steel ball 7.0

Tool holder

Steel ball 6 (2 pcs.)

Torsion spring 31

Change ring

Tool holder

Change cover

Repair

[3] DISASSEMBLY/ASSEMBLY [3]-1B. Holder section for BHR243 (cont.)

P 7/ 25

ASSEMBLING

(1) Assemble Torsion spring 31 to Tool holder as follows:

• Set two Steel balls 6 on the holes of Tool holder.

• Insert the short arm of Torsion spring 31 into the hole of Tool holder. Note: Apply Makita grease No. RB No. 00 to two Steel balls 6 to prevent them from falling. (Fig. 14) (2) Assemble Change ring to Change cover. (Fig. 15) (3) Assemble Tool holder to Change cover. (Fig. 16)

Fig. 15 Fig. 16

Insert the long arm of Torsion spring 31 into

Note:

Face the chamfered end

of the hole upward.

Align the hole of Change ring with

that of Change cover.

[Section a - a']

Change ring

the hole of Change cover

through the hole of

Change ring.

By turning Tool holder

approx. 75

Tool holder can be fastened

to Change cover.

Fig. 14

Torsion spring 31

long arm

clockwise,

short arm

Tool holder

Steel ball 6 (2pcs.)

Tool holder

long arm of

Torsion spring 31

Change cover

Change ring

Change cover

(4) Put Steel ball 5.0 in the groove surrounded by Change cover and Tool holder. (left in Fig. 17) (5) Set Leaf spring and Flat washer 24 in change cover, then secure them with Ring spring 21. (right in Fig. 17) (6) As for Cap 35 side, assemble the components by reversing disassembly procedure. Refer to the previous page.

Fig. 17

Steel ball 5.0

Change cover

Tool holder

Ring spring 21

Flat washer 24

Leaf spring

Change cover

Repair

[3] DISASSEMBLY/ASSEMBLY [3]-2. Drill chuck assembly for BHR243

DISASSEMBLING

Drill chuck assembly can be disassembled as drawn in Figs. 18 to 22.

Fig. 18 Fig. 19

P 8/ 25

After Removing Ring spring 21, strike Drill chuck assembly against workbench which is covered with a cloth as a cushion. Flat washer 24, Leaf spring and Steel ball 5.0 can be removed.

1R003

1R212

Ring spring 21

Steel ball 5.0

Leaf spring

Flat washer 24

Remove Spacer and two Steel balls 6 from Chuck holder.

Clamp the flats of Chuck holder in vise, then unscrew M6x22 Flat head screw by turning it clockwise using Impact driver.

Pull off Change cover. Change ring and Torsion spring 31 can be removed.

Spacer

Chuck holder

Torsion spring 31

Change ring

Change cover

Fig. 22Fig. 21Fig. 20

Clamp the flats of Chuck holder in vise, then separate Drill chuck from Chuck holder by turning it counterclockwise using Hex wrench 10.

Spacer

Steel ball 6 (2 pcs.)

Chuck holder

Hex wrench 10

M6x22 Flat head screw

Chuck holder

+ 17 hidden pages