Makita HR4002 Technical Information
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Makita HR4002 Technical Information

Rotary hammer 40mm (1-9/16 inch)
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T
ECHNICAL INFORMATION
Model No.
Description
C
ONCEPT AND MAIN APPLICATIONS
Model HR4002 has been developed as a 40mm (1-9/16")
SDS-Max Rotary Hammer cost-competitive with competitor B's model.
Features high cost-competitiveness obtained by reducing functions
to the minimum required for a rotary hammer, but still ensuring
work efficiency higher than the competing models.
S
pecification
Voltage (V)
110
120
220
230
240
No load speed: min
Impacts per minute: min
Shank type: mm (")
:
Max TCT bit diameter
Capacities
mm (")
Max Core bit diameter
Torque limiter
Double insulation
Power supply cord: m (ft)
Net weight: kg (lbs)
S
tandard equipment
Side handle (Bar-shaped) ......... 1 pc
Bit grease ................................. 1 pc
Depth gauge ............................. 1 pc
Plastic carrying case................. 1 pc
Note: The standard equipment for the tool shown may differ from country to country.
O
ptional accessories
* TCT bits
* Core bits
* Bull points
* Cold chisels
* Scaling chisels
* Scaling chisel (for tile)
* Grooving chisels
HR4002
Rotary Hammer 40mm (1-9/16")
Cycle (Hz)
Current (A)
10
50/ 60
10
50/ 60
5
50/ 60
4.8
50/ 60
4.6
50/ 60
= rpm
-1
= ipm
-1
* Clay spade
* Bushing tool
* Rammer
* Shank (for Rammer and Bushing tool),
* Chemical anchor adapter
* Bit grease
* Grease vessel (containing Hammer grease)
Continuous Rating (W)
Input
1,050
---
1,050
1,050
1,050
680
2,500
18 (11/16) SDS-Max
40 (1-9/16)
105 (4-1/8)
Yes
Yes
North America: 3.0 (9.8)
Europe: 4.0 (13.1)
Other countries: 5.0 (16.4)
6.2 (13.7)
L
W
Dimensions: mm (")
Length (L)
Width (W)
114 (4-1/2)
Height (H)
256 (10-1/8)
Max. Output (W)
Output
570
1,200
650
1,200
570
1,200
570
1,200
570
1,200
* Side handle (D-shaped)
* Plastic carrying case
* Blow-out bulb
* Safety goggle,
* Hammer service kit
* Depth gauge
PRODUCT
P 1 / 20
H
458 (18)

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  • Page 1 Description Rotary Hammer 40mm (1-9/16") ONCEPT AND MAIN APPLICATIONS Model HR4002 has been developed as a 40mm (1-9/16") SDS-Max Rotary Hammer cost-competitive with competitor B's model. Features high cost-competitiveness obtained by reducing functions to the minimum required for a rotary hammer, but still ensuring work efficiency higher than the competing models.

  • Page 2: Necessary Repairing Tools

    [2] LUBRICATION Apply Makita grease R. No.00 to the following portions designated with the black triangle to protect parts and product from unusual abrasion, and apply Makita grease N No.2 to the portions designated with white triangle. Item No. Description...

  • Page 3: Chuck Section

    P 3 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -1. Chuck Section DISASSEMBLE 1. Chuck section can be disassembled in the order from Fig. 2 to Fig. 9. Fig. 2 Fig. 3 Putting the machine on 1R350, 1. Disassemble Handle section remove Tool holder cap with from the machine.

  • Page 4: Tool Holder

    [3] -2. Tool Holder Section and Barrel Complete DISASSEMBLE 1) In case of HR4002, it is not necessary to disassemble Chuck section, when repairing inside of Tool holder section. Remove Barrel complete together with Chuck section. (Fig. 10) Now Impact bolt comes into your sight.
  • Page 5 P 5 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -2. Tool Holder Section and Barrel Complete DISASSEMBLE 6) Oil seal 32 is assembled to Barrel complete on the Release cover side. Remove the Oil seal by pushing with Slotted head screwdriver from the Crank housing complete side. (Fig. 14) Fig.
  • Page 6 P 6 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -2. Tool Holder Section and Barrel Complete ASSEMBLE 4) From the Bit installing side, assemble Flat washer 45 to Tool holder. (Fig. 18) 5) And then, assemble Urethane ring 45 to Tool holder from its Bit installing side. (Fig. 18) Fig.
  • Page 7 P 7 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -3. Cylinder Section DISASSEMBLE 1) Disassemble Chuck section, Barrel and Tool holder section from Crank housing, as illustrated in Fig. 10. 2) Remove the parts from Cylinder 28.5 in the following order. (Fig. 20) 1.
  • Page 8 P 8 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -4. Crank Section DISASSEMBLE 1) Disassemble Tool holder and Barrel section. (Fig. 10) 2) Disassemble Cylinder section. (Fig. 20 and Fig. 21) 3) Take out Link plate and Link plate guide from Crank housing complete. (Fig. 24) 4) Disassemble Link plate and Compression spring 7 from Link plate guide.
  • Page 9 P 9 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -4. Crank Section DISASSEMBLE 6) Disassemble Ring spring 31 from Cylinder 28.5. (Fig. 27) 7) Remove Ring 33 from Cylinder 28.5. (Fig. 28) 8) Setting 1R213 and 1R350 to Crank housing complete, disassemble Cylinder 28.5 from Crank housing complete. (Fig.
  • Page 10 P 10 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -4. Crank Section DISASSEMBLE Note: Remove Cylinder 28.5 with a pair of Screwdriver when you do not have 1R213. (Fig. 29A) Fig. 29A Cylinder 28.5 Cylinder 28.5 can be removed from Crank housing complete by levering up it with a pair of Wood piece to protect Screwdriver.
  • Page 11 P 11 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -4. Crank Section (cont.) ASSEMBLE 7) Insert Lock sleeve with Lock sleeve guide into Crank housing complete. (Fig. 32) 8) Assemble Compression spring 7 and Link plate to Link plate guide. (Refer to Fig. 25.) 9) Assemble Link plate with Link plate guide while fitting Link plate to the notch of Lock sleeves's tail.
  • Page 12 P 12 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -5. Armature DISASSEMBLE 1) Disassemble Handle section from Motor housing. (Fig. 2) 2) After removing Rear cover, disconnect Carbon brush from Commutator by pulling out it. 3) Remove Pan head screw M5x35. (Fig. 35) 4) Disassemble Motor housing from Gear housing complete.
  • Page 13 P 13 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -5. Armature ASSEMBLE 1) Do the reverse Step of Disassembling.. Note: Do not forget to assemble Baffle plate. (Refer to left Fig. 37.) [3] -6. Torque Limiter Section DISASSEMBLE 1) Disassemble Motor section as per Illustrations from Fig. 34 to Fig. 37. 2) Disassemble Gear housing complete from Crank housing complete.
  • Page 14 P 14 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -6. Torque Limiter Section ASSEMBLE 1) After mounting Ball bearing 6904LLU, assemble the parts to Torque limiter complete in the order of Driving flange, Conical compression spring 19-2 and Cup washer 8. (Fig. 41) 2) Fix the Cup washer 8 provisionally by turning it approx.
  • Page 15 P 15 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -7. Crank Shaft DISASSEMBLE 1) Disassemble Crank shaft as per the illustration from Fig. 44 to Fig. 49. Fig. 44 Fig. 45 Crank shaft Crank shaft Gear housing complete Insertion hole for Crank shaft Strike Gear housing complete with Plastic hammer.
  • Page 16 P 16 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -7. Crank Shaft ASSEMBLE Do the reverse step of Disassembling. Note: Mount the assembled Crank shaft, while aligning it to the Insertion hole. (Refer to Fig. 44.) And connect Connecting rod with the Pin of Crank shaft. [3] -8.
  • Page 17 P 17 / 20 epair [3] DISASSEMBLY/ASSEMBLY [3] -9. Field and Brush Holder Unit ASSEMBLE 1) First assemble Field to Motor housing and then assemble Brush holder unit to Motor housing. Refer to Figs. 53, 54, 55, 56, 57 and 58. Note: 1) The wrong order will causes Breakage or Deform of the Terminals of Field to assemble Brush holder unit.

  • Page 18: Maintenance

    28. O ring 22 on Impact bolt 21. Fluoride ring 25 40. O ring 22 on Piston Fig. 60 Impact bolt Striker Piston Tool holder 20 21 22 2) Additionally apply approx. 60cc of Makita grease R No.00 to the inside of Crank housing complete.

  • Page 19: Circuit Diagram

    P 19 / 20 ircuit diagram Fig. D-1 Color index of lead wires' sheath Black White Blue Brown This Lead wire is white for some Countries. Power Supply Cord This Lead wire is black for some Countries. Brush Holder Unit Switch Lead Unit Sponge...

  • Page 20: Wiring Diagram

    P 20 / 20 iring diagram Fig. D-2 Connecting Lead Unit Handle Lead Unit Pull the Lead wire (white) through the Hole for guiding to connect it Wire-connecting Portion to Switch. Connect Lead unit, facing the Hole Wire-connecting Portion toward Top. Fig.

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