MAKITA DHR241Z, DHR241RFE Manual
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ECHNICAL INFORMATION |
PRODUCT |
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BHR241 |
P 1/ 14 |
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Models No. |
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Description |
Cordless Combination Hammer |
L |
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CONCEPT AND MAIN APPLICATIONS |
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The cordless version of HR2470 has been launched |
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with D-handle for operator's comfort. |
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This new product is available in the following variations.
Model No. |
Battery |
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Charger |
Plastic |
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Type |
Quantity |
carrying case |
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BHR241RFE |
BL1830 |
2 |
DC18RA |
Yes |
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BHR241RF |
1 |
Yes |
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BHR241Z |
No |
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No |
No |
The variations for USA, Canada, Mexico and Panama are as follows.
Model No. |
Battery |
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Charger |
Plastic |
Type |
Quantity |
carrying case |
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BHR241 |
BL1830 |
2 |
DC18RA |
Yes |
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BHR241Z |
No |
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No |
No |
Specification
Dimensions: mm (")
Length (L) |
417 (16-3/8) |
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Width (W)* |
84 (3-5/16) |
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Height (H) |
219 (8-5/8) |
* excludes Grip assembly
No load speed : (min -1= rpm) |
0 - 1,100 |
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Blows per min, :(bpm=min -1) |
0 - 4,000 |
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Max. Output(W) |
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330 |
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Voltage: V |
18 |
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Battery |
Cell and Capacity |
Li-ion 3.0 Ah |
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Charging Time: min. |
22 with DC18RA |
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Chuck Capacity: mm ( " ) |
10 (3/8) |
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Bit Shank |
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SDS-plus |
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Capacity |
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Steel |
13 (1/2) |
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Wood |
26 (1-1/16) |
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: mm ( " ) |
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* Concrete |
20 (13/16) |
* Concrete: 24 (15/16) |
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Operation mode |
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3 modes |
for North America |
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R= Rotation only |
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H+R= Hammering with Rotation |
(R/ H+R/ H) |
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H= Hammering only |
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Variable switch |
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Yes |
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Reverse switch |
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Yes |
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Clutch (Torque Limiter) |
Yes |
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Electric Brake |
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Yes |
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Net Weight : kg (lbs) |
3.2 (7.0) including Battery BL1830 |
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[3.5 (7.7) measured by EPTA regulation] |
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Standard equipment
* Grip assembly ................................... |
1 set |
* Depth gauge (Stopper pole) .............. |
1 pc. |
Note: The standard equipment for the tool shown above may differ by country.
Optional accessories
* SDS-Plus bits |
* Chuck key S13 |
* Bull points |
* Charger DC18RA |
* Taper shank T.C.T bits |
* Keyless drill chuck |
* Dust Cup |
* Charger DC18SC |
* Taper shank adapter |
* Grip assembly |
* Grease Vessel 30g |
* Charger DC24SA |
* Cotter |
* Scraper Assembly |
* Blow out bulb |
* Charger DC24SC |
* Drill chuck assembly |
* Cold chisels |
* Safety goggle |
* Battery BL1830 |
* Chuck adapter |
* Grooving chisels |
* Dust extractor attachment |
* Hammer service kit |
* Drill chuck S13 |
* Scaling chisels |
* Joint 25 |
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See more at http://safe-manuals.com
P 2/ 14
Repair
CAUTION: Remove the battery and the bit from the machine for safety before repair/ maintenance in accordance with the instruction manual!
[1] NECESSARY REPAIRING TOOLS
Code No. |
Description |
Use for |
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1R003 |
Retaining ring S pliers SR-2 |
Removing / Installing Ring spring 19 |
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1R004 |
Retaining ring S pliers ST-2N |
Removing Ring spring 29 |
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1R022 |
Bearing plate for Arbor press |
Removing Helical gear 25 from Cam shaft |
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1R023 |
Pipe ring (for Arbor press) |
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1R032 |
Bearing setting plate 8.2 |
Installing Helical gear 25 to Cam shaft |
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1R033 |
Bearing setting plate 10.2 |
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1R038 |
Armature holder 32 set for vise |
Holding Tool holder complete |
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1R164 |
Ring spring setting tool A |
Installing Oil seal 25 to Gear housing complete |
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1R165 |
Ring spring setting tool B |
Installing Needle bearing complete to Gear housing complete |
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1R212 |
Tip for Retaining ring pliers |
Attaching to 1R003 for removing Ring spring 19 |
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1R232 |
Pipe 30 |
Installing Oil seal 25 to Gear housing complete |
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1R252 |
Round bar for Arbor 30-100 |
Disassemble Oil seal 25 and Needle bearing complete from Gear housing |
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complete |
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1R269 |
Bearing extractor |
Disassemble Ball bearing 608ZZ from Cam shaft |
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1R281 |
Round bar for Arbor 7-50 |
Removing Striker from Tool holder complete |
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Removing Ring 8 from Cam shaft |
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1R291 |
Retaining ring S and R pliers |
Removing / Installing Retaining ring S-7 from / to Cam shaft |
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1R306 |
Ring spring removing jig |
Removing / Installing Ring spring 29 from / to Tool holder complete |
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[2] LUBRICATION
Apply the following grease to protect parts and product from unusual abrasion.
*Makita grease R No.00 to the portions marked with black triangle
*Molybdenum disulfide lubricant to the portions marked with gray triangle
Item No. |
Description |
Portion to lubricate |
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Lubricant |
Amount |
1 |
Cap 35 |
Lip portion where Bit is inserted |
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13 |
Change lever |
Pin portion |
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16 |
O ring 17 |
Whole portion |
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17 |
Gear housing complete |
Inside where Swash bearing section rotates |
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28 |
Spur gear 51 |
(a) Teeth portion, (b) Surface where Clutch portion of |
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30 Tool holder complete contacts |
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29 |
Steel ball 7 |
Whole portion |
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Makita grease R |
a little |
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No. 00 |
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(c) Surface where Needle bearing complete contacts |
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30 |
Tool holder complete |
(d) Surface where Plane bearing 28 of |
63 Inner |
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housing complete contacts |
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(e) Inside where 41 Piston cylinder reciprocates |
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34 |
Ring 10 |
Surface where Cushion ring 13 contacts |
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37 |
O ring 9 |
Whole portion |
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Tool Holder Section |
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Needle bearing |
(a) |
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(c) |
(d) |
complete |
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17 |
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28 |
29 |
30 |
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Makita grease R No. 00 Cushion ring 13
34 |
37 |
(b) |
(e) |
Impact bolt |
16 |
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Sleeve 9 |
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13 |
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See more at http://safe-manuals.com
P 3/ 14
Repair
[2] LUBRICATION (cont.)
Item No. |
Description |
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Portion to lubricate |
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Lubricant |
Amount |
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40 |
O ring 16 |
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Whole portion |
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(f) Inside where Striker moves |
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Makita grease R No. 00 |
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41 |
Piston cylinder |
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(g) Hole for accepting Piston joint |
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(h) Surface where |
30 Tool holder complete contacts. |
Molybdenum disulfide |
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(Refer to Fig. 1.) |
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lubricant |
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49 |
Spur gear 10 |
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Gear teeth where |
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28 |
Spur gear 51 engages (Refer to Fig. 1.) |
Makita grease R No. 00 |
a little |
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50 |
Cam shaft |
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Surface where 51 Clutch cam and 49 Spur gear 10 contact |
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(i) Outside groove |
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Molybdenum disulfide |
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51 |
Clutch cam |
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lubricant |
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(j) Side where 52 Swash bearing 10 engages |
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52 |
Swash bearing 10 |
Pole portion which is inserted into Piston joint |
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4g |
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Bearing portion |
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53 |
Helical gear 25 |
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Teeth portion |
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Makita grease R No. 00 |
17g |
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63 |
Inner housing |
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Space where Armature's drive end and 53 |
Helical gear 25 |
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a little |
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complete |
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engages |
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17 |
Gear housing |
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(k) Crank room |
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5g |
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complete |
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Fig. 2 |
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Swash Bearing Section |
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Makita grease R No. 00 |
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40 |
41 |
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Flat washer 12 |
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Molybdenum disulfide |
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Compression spring 7 |
Striker |
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(h) |
(g) |
Piston joint |
lubricant |
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(f) |
Armature |
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Ball bearing 606ZZ |
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(k) Crank room |
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(g) |
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(j) |
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Retaining ring S-7 |
49 |
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50 |
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(i) |
51 |
52 53 |
63 |
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[3] DISASSEMBLY/ASSEMBLY [3] -1. Tool Holder Section
DISASSEMBLING
Disassemble Tool holder section as illustrated in Fig. 3.
Fig. 3 |
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1R003 |
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Chuck cover |
Ring 21 |
1R212 |
Cap 35 |
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Guide washer |
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Ring 21 |
Ring spring 19 |
Steel ball 7.0 |
Conical compression |
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spring 21-29 |
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Ring 21 |
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Chuck cover |
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Flat portion |
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Disassemble Cap 35 and remove Ring spring 19 with 1R003 and 1R212.
Note: Replace the tips of 1R003 to those of 1R212.
Disassemble Chuck cover. And remove Steel ball 7.0 while pressing down Ring 21.
After disassembling Steel ball 7.0, the Tool holder section can be disassembled as illustrated above.
ASSEMBLING
Do the reverse of the disassembling step.
Note: Be sure to place the flat portion of Ring spring 19 on Steel ball 7.0. Refer to Fig. 3.
See more at http://safe-manuals.com
P 4/ 14
Repair
[3] DISASSEMBLY/ASSEMBLY [3] -2. Change Lever
DISASSEMBLING
Disassemble Change lever as illustrated in Figs. 4 and 5.
Fig. 4
Change lever |
Drill mode |
Lock button 
Pushing Lock button into Change lever, turn Change lever fully to Drill mode until it stops.
Fig. 5
Remove Change lever by levering up it with Slotted head screwdriver, inserted between Gear housing complete and Change lever.
ASSEMBLING
1)Assemble Change lever to Gear housing complete in the order of Figs. 6 and 7.
2)Make sure that Change lever stops at every operation mode exactly after assembling.
Fig. 6
Hammer drill mode
small pin |
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of Change |
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lever |
Lock plate |
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Drill mode |
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large pin of Change |
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lever |
Lock plate can be seen through the hole for Change lever insertion before mounting Change lever.
When inserting Change lever into Gear housing complete, contact the small pin to this Lock plate as designated in gray color. Change lever can be inserted in Hammer drill mode.
Pushing Lock button into Change lever, turn Change lever fully
to Drill mode until it stops.
Fig. 7
Lock button
Pushing Lock button into Change lever, tap Change lever.
Change lever can be assembled to Gear housing complete.
See more at http://safe-manuals.com
P 5/ 14
Repair
[3] DISASSEMBLY/ASSEMBLY [3] -4. Armature
DISASSEMBLING
1)Remove Holder cap cover by inserting Slotted screwdriver between Holder cap cover and Motor housing complete. (Fig. 8) Then remove Holder cap and Carbon brushes.
2)Seperate Gear housing complete from Motor housing complete by loosening 4x40 Tapping screws (4 pcs.). Armature is left on Gear housing complete in this step. (Fig. 9)
3)Pull Armature out from Gear housing complete by hand. (Fig. 10) This way is easier than using Plastic hammer to strike Gear housing portion. (Ball bearing 6000DDW of Armature is tightly fit into the bearing room in Gear housing complete using O ring 26. )
Fig. 8 |
Fig. 9 |
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Fig. 10 |
Holder cap cover |
Gear housing |
Motor housing |
Ball bearing 6000DDW |
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complete |
complete |
of Armature (behind the Fan) |
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bearing room of |
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4x40 Tapping screws (4 pcs.) |
Gear housing complete |
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ASSEMBLING
Do the reverse of the disassembling step.
[3] -5. Torque Limiter Section
DISASSEMBLING
1)Disassemble Tool holder section as illustrated in Fig. 3.
2)Disassemble Change lever as illustrated in Figs.4 and 5.
3)Separate Gear housing complete from Motor housing. Then remove Armature from Gear housing complete. (Figs. 8 to 10)
4)Disassemble Torque limiter section as illustrated in Figs. 11 and 12.
5)Remove the Ring spring 29 to separate Washer 31, Compression spring 32 and Spur gear 51 (Figs. 13 and 14)
Fig. 11
Gear housing complete
Torque limiter |
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section |
Remove Torque limiter |
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section from Gear housing |
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complete by striking |
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Chuck assembling portion |
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with Plastic hammer. |
Ball bearing 606ZZ remains fixed in Gear housing complete.
Fig. 13
Assemble two pcs. of 1R022 to 1R306 and hold them to the ram
of arbor press. Put Torque limiter section on the table of arbor press.
1R036 |
ram of arbor press |
1R022 (2 pcs.)
Washer 31 |
Ring spring 29 |
Table of arbor press |
Fig. 12
Torque limiter section
Piston cylinder
Flat washer 28
Inner housing complete
Remove Torque limiter section from Piston cylinder and Inner housing complete.
Fig. 14
While compressing Compression spring 32 by pressing down Washer 31 using arbor press, remove Ring spring 29 using 1R004.
Spur gear 51 can be removed.
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Ring spring 29 |
1R004 |
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Washer 31 |
Spur gear 51 |
Compression spring 32 |
See more at http://safe-manuals.com
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