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T
ECHNICAL INFORMATION
Models No.
Description
C
ONCEPT AND MAIN APPLICATIONS
Models HM0871C and HM0870C are 5kg-class demolition hammers
adapted for SDS-MAX bits, and developed from HM0860C, featuring:
Same high work efficiency as HM0860C
Higher durability achieved by using ball bearing for crank section
AVT* for reduced vibration during chipping (HM0871C only)
Suppression of motor speed during no-load for reduced vibration
when idling
Listed below are the specification differences between the two models.
Model No.
AVT*
Vibration absorbing handle
Suppression of motor speed during no-load
*Anti-Vibration Technology using Active dynamic vibration absorber
S
pecification
Voltage (V)
110
120
220
230
240
Model No.
Impacts per min: min-
Shank type
Shank diameter: mm (")
AVT (
Anti-Vibration Technology using
Vibration
Active dynamic vibration absorber)
absorption
Vibration absorbing handle
Variable speed control by dial
Soft start
Electronic
Constant speed control
control
Suppression of motor speed
during no-load
Double insulation
Power supply cord: m (ft)
Net weight*
: kg (lbs)
1
Net weight*
: kg (lbs)
2
*1 Weight according to
*2 Weight according to
S
tandard equipment
Side handle (Bar- or D-shaped) ........... 1
Bit grease .............................................. 1
Note: The standard equipment for the tool shown above may vary by country.
O
ptional accessories
Bull points
Cold chisels
Scaling chisels
Scaling chisel (for Tile)
HM0871C, HM0870C
Demolition Hammers
HM0871C
Yes
Current (A)
Cycle (Hz)
12
50/60
10
50/60
5.8
50/60
5.8
50/60
5.8
50/60
= ipm
1
with bar-shaped Side handle.
EPTA-Procedure 01/2003,
with D-shaped Side handle.
EPTA-Procedure 01/2003,
Plastic carrying case ........................ 1
Cleaning cloth .................................. 1
Grooving chisel
Clay spade
Bushing tool
Rammer
[The image above is HM0871C.]
Model No.
HM0870C
Length (L)
Width (W)
No
Height (H)
Continuous Rating (W)
Input
Output
1,100
---
1,100
1,100
1,100
HM0871C
1,100 - 2,650
Adapted for SDS-MAX bits
18 (11/16)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Europe, Hong Kong, Korea: 4.0 (13.1);
Brazil: 2.0 (6.6); Other countries: 5.0 (16.4)
5.6 (12.4)
5.8 (12.8)
Shank (for Bushing tool and Rammer)
Grease vessel (containing 30g hammer grease)
Side handle (Bar-shaped/ D-shaped)
Safety goggles
Hammer service kit
PRODUCT
P 1/ 17
L
W
Dimensions: mm (")
HM0871C
HM0870C
466 (18-3/8) 449 (17-3/4)
116 (4-9/16) 109 (4-1/4)
230 (9)
Max. Output (W)
450
1,200
450
1,200
500
1,200
500
1,200
500
1,200
HM0870C
No
No
No
5.1 (11.1)
5.3 (11.6)
H

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Table of Contents

   Summary of Contents for Makita HM0871C

  • Page 1 Description Demolition Hammers ONCEPT AND MAIN APPLICATIONS Models HM0871C and HM0870C are 5kg-class demolition hammers adapted for SDS-MAX bits, and developed from HM0860C, featuring: Same high work efficiency as HM0860C Higher durability achieved by using ball bearing for crank section...
  • Page 2 Apply the following lubricants to the portions to protect the parts and product from unusual abrasion. Item No. Description Portion to lubricate Lubricant Amount Tool holder cap Lip portion Makita grease a little N.No.2 Tool retainer Belly portion where Hammer bit contacts Steel ball 4.8 (4pcs.) Whole portion Fluoride ring 28...
  • Page 3 P 3/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-1. Chuck section DISASSEMBLING (1) Remove Tool holder cap as illustrated in Fig. 2. Fig. 2 Remove Handle section by loosening four 5x25 Stand the machine upright. While pressing down Chuck cover, Tapping screws, and then disconnect Lead unit remove Tool holder cap.
  • Page 4 Note: Do not apply any grease to O ring 23, or the Fluoride ring will not shrink even using Taper sleeve. Be sure to apply Makita grease R.No.00 to the outer surface of Fluoride ring 28 after fitting into Impact bolt.
  • Page 5 Hammer bit insertion side Impact bolt Tool holder [3]-3 Active dynamic vibration absorber (exclusively for HM0871C) DISASSEMBLING (1) First, disassemble Chuck section as illustrated in Fig. 2, 3 and 4. (2) Remove Housing cover as illustrated in Fig. 9. Fig. 9...
  • Page 6 P 6/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-3 Active dynamic vibration absorber (exclusively for HM0871C) (cont.) DISASSEMBLING (4) The removed Active dynamic vibration absorber can be disassembled as illustrated in Fig. 11. Fig. 11 Pipe holder B Pipe holder support Pipe holder B...
  • Page 7 DISASSEMBLING (1) Disassemble Chuck section as illustrated in Figs 2, 3 and 4. (2) Remove Housing cover as illustrated in Fig. 9. In case of HM0871C, disassemble Active dynamic vibration absorber as illustrated Figs. 9 and 10. (3) Striker and Piston can be disassembled as illustrated in Figs. 15 and 16.
  • Page 8 P 8/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-4 Piston, Striker, Cylinder (cont.) DISASSEMBLING (4) Separate Cylinder section from Barrel. The parts on Tool holder side can be removed from Cylinder 32 as per the right illustration in Fig. 17. Fig. 17 Remove Cylinder section by tapping Barrel using Ring 20, Rubber ring 20, Flat washer 23, Guide ring, plastic hammer.
  • Page 9 P 9/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-5 Crank shaft DISASSEMBLING (1) Separate Barrel from Crank housing. (Fig. 15) (2) Remove Crank cap, Seal ring, Air pipe and Flat washer 34 from Crank housing. (the left illustration in Fig. 16) (3) Remove Piston together with Connecting rod ( the right illustrations in Fig. 16) Note: Turn Crank shaft so that the crank pin is at the closest position to Barrel side for easy removal of Connecting rod.
  • Page 10 P 10/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-5 Crank shaft DISASSEMBLING (1) Separate Barrel from Crank housing as per the left illustration in Fig. 15. (2) Remove Crank cap, Seal ring Air pipe and Flat washer 34 from Crank housing as per the left illustration in Fig. 16. (3) Remove Piston together with Connecting rod as per the center and right illustrations in Fig.
  • Page 11 (3) Assemble Air pipe, Seal ring and Crank cap. And secure them with M4x18 Pan head screws. Refer to the left illustration in Fig. 16. Fig. 23 Fig. 24 HM0870C HM0871C Retaining ring R-40 17mm 17.5mm Center of Ball bearing 6203LLU...
  • Page 12 (1) Disassemble Chuck section as illustrated in Fig. 2, Fig. 3, Fig. 4. However, no need to remove Tool holder. (2) Disassemble Housing cover as illustrated in Fig. 9. (3) In case of HM0871C, remove Active dynamic vibration abosorber after removing Housing cover. See Fig. 10. (4) Disconnect Carbon brush from Armature’s commutator as illustrated in Fig. 30.
  • Page 13 P 13/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-8 Armature (cont.) DISASSEMBLING (6) Disassemble Armature from Crank housing as illustrated in Fig. 32. If it is difficult to remove as illustrated in Fig. 32, Crank shaft has to be removed in the following process. 1.
  • Page 14 Power supply cord screw (3) In case of HM0871C, the Vibration absorbing handle section can be disassembled as illustrated in Fig. 35. Fig. 35 Unscrew 5x25 Tapping screws. So Vibration absorbing handle can be disassembled in five parts as illustrated below.
  • Page 15 P 15/ 17 epair [3] DISASSEMBLY/ASSEMBLY [3]-10. Fastening torque Fasten the following bolts to the specific fastening torque. Fastening torque Item No. Description Q’ty Use for 7.8 - 11.7 N.m M6 x 25 Hex socket head bolt Fastening Barrel to Crank housing complete 2.9 - 3.4 N.m M5 x 25 Hex socket head bolt Fastening Housing cover to Barrel...
  • Page 16 Power supply cord iring diagram Fig. D-2 Note in wiring Controller for HM0870C is different from that for HM0871C. Indication for 110V-127V area HM0870C HM0871C Controller without No Load Speed with No Load Speed...
  • Page 17 P 17/ 17 iring diagram Fig. D-3 Lead Unit Pass the Lead wires of Lead unit through Polyethylene tube illustrated below. Polyethylene Tube Ø8-30 for connecting to Switch for connecting to Terminal block Connector Fig. D-4 Handle Put the following Lead wires of Lead unit into Sponge sheet.

This manual is also suitable for:

Hm0870c

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