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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.

Dimensions: mm (")

Width (W)
Height (H)

Length (L)

Model No.

HM0870C

HM0871C

466 (18-3/8) 449 (17-3/4)
116 (4-9/16) 109 (4-1/4)

230 (9)

L

H

W

S

pecification

S

tandard equipment

O

ptional  accessories

Note:

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

Continuous Rating (W)

Voltage (V)

Cycle (Hz)

Input

Output

Max. Output (W)

110
120
220
230
240

12
10

5.8
5.8
5.8

50/60
50/60
50/60
50/60
50/60

1,100

---

1,100
1,100
1,100

450
450
500
500
500

1,200
1,200
1,200
1,200
1,200

Current (A)

Model No.

HM0870C

HM0871C

Europe, Hong Kong, Korea:

 

4.0 (13.1);

Brazil: 2.0 (6.6); Other countries: 5.0 (16.4)

Double insulation

Power supply cord: m (ft)

Yes

5.6 (12.4)

5.1 (11.1)

5.8 (12.8)

5.3 (11.6)

Net weight

*

1

: kg (lbs)

Net weight

*

2

: kg (lbs)

Impacts per min: min-

1

= ipm

Shank diameter: mm (") 

1,100 - 2,650

Electronic

control

Variable speed control by dial

Constant speed control

Soft start

Yes
Yes
Yes

Suppression of motor speed

during no-load

Yes

No

Yes

No

18 (11/16)

Shank type 

Adapted for SDS-MAX bits

*1

 Weight according to 

EPTA-Procedure 01/2003, 

with bar-shaped Side handle.

*2

 Weight according to 

EPTA-Procedure 01/2003, 

with D-shaped Side handle.

Bull points

Cold chisels

Scaling chisels

Scaling chisel (for Tile)

Grooving chisel

Clay spade

Bushing tool

Rammer

Shank (for Bushing tool and Rammer)

Grease vessel (containing 30g hammer grease)

Side handle (Bar-shaped/ D-shaped)

Safety goggles

Hammer service kit

Side handle (Bar- or D-shaped) ...........  1

Bit grease .............................................. 1

Plastic carrying case ........................  1

Cleaning cloth ..................................  1

Vibration

absorption

AVT (

Anti-Vibration Technology using

           Active dynamic vibration absorber)

Vibration absorbing handle

Yes

No

[The image above is 

HM0871C

.]

Model No.
AVT

*

Vibration absorbing handle

Yes

No

HM0870C

HM0871C

Suppression of motor speed during no-load

Models No.

 Description

PRODUCT

T

ECHNICAL INFORMATION

C

ONCEPT AND MAIN APPLICATIONS

 

P  1/ 1

7

HM0871C, HM0870C

Demolition Hammers

*

Anti-Vibration Technology using Active dynamic vibration absorber

Summary of Contents for HM0871C

Page 1: ... 11 1 5 8 12 8 5 3 11 6 Net weight 1 kg lbs Net weight 2 kg lbs Impacts per min min 1 ipm Shank diameter mm 1 100 2 650 Electronic control Variable speed control by dial Constant speed control Soft start Yes Yes Yes Suppression of motor speed during no load Yes No Yes No 18 11 16 Shank type Adapted for SDS MAX bits 1 Weight according to EPTA Procedure 01 2003 with bar shaped Side handle 2 Weight a...

Page 2: ...removing jig When it is difficult to remove Armature from Crank housing complete 1R363 Ring spring removing tool Removing Ring spring 25 Removing Ring springs Removing Retaining ring INT round R 42 Description Use for Item No Apply the following lubricants to the portions to protect the parts and product from unusual abrasion Description Portion to lubricate Lubricant Amount a little a little a li...

Page 3: ...ssure by Flat washer 28 3 Remove Ring spring 25 using 1R003 with 1R212 4 Remove Flat washer 28 Rubber ring 28 and Chuck ring Remove Spring guide Compression spring 52 and Plate Remove four Steel balls 4 8 with Slotted screwdriver magnetized by 1R288 Remove Change ring together with Lock ring And separate Lock ring from Change ring While pressing down Spring guide push out Tool retainers by screwdr...

Page 4: ...face of Fluoride ring 28 1 When particles and dust are in the inside of Barrel and Crank housing be sure to clean them up 2 Fit O ring 23 into the groove of Impact bolt and then put Fluoride ring 28 on O ring 23 as illustrated in Fig 7 3 Assemble Tool holder and Chuck section by taking the reverse step of Figs 5 4 3 and 2 Note Do not apply any grease to O ring 23 or the Fluoride ring will not shri...

Page 5: ...Spring guide tilted and stuck in Pipe holder A Crank housing Insert two slotted screwdrivers between Crank housing and Active dynamic vibration absorber and then lever up Active dynamic vibration absorber from Crank housing 3 Remove Active dynamic vibration absorbers from the both side of the machine as illustrated in Fig 10 3 3 Active dynamic vibration absorber exclusively for HM0871C DISASSEMBLI...

Page 6: ...ring guide to be protruded from Pipe holder A Protrude Spring guide from Pipe holder A with Screwdriver Tighten M6x25 Hex socket head bolt designated with black arrow in order to align Insertion hole for Pipe holder support with Insertion hole for Pipe holder A Then tighten the other M6x25 M6x25 Hex socket head bolts 3pcs Pipe holder A Screwdriver Insertion hole for Pipe holder A Protrusion as dis...

Page 7: ...is not necessay to remove Tool holder from Barrel Barrel Crank cap Remove Crank cap Seal ring Air pipe and Flat washer 34 from Crank housing O rings on Piston can be replaced Seal ring Flat washer 34 Air pipe Turning Crank shaft set Piston to the closest position to Barrel side Barrel Striker O ring 24 Striker Separate Striker from Barrel and then remove O ring 24 from Striker M4x18 Pan head screw...

Page 8: ...tration in Fig 17 5 Pressing down Ring 36 remove Ring spring 34 A from Groove A on Cylinder 32 with 1R291 The components of Cylinder section can be separated by removing Ring spring 34 B and C Fig 18 Barrel Barrel Ring 20 fit to the long drum side of Impact bolt Guide ring Slide sleeve Cylinder 32 Rubber ring 20 Flat washer 23 Cylinder Section Ring 36 Groove A on Cylinder 32 Ring spring 34 1R291 C...

Page 9: ...ustration 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 4 remove Crank shaft as illustrated in Figs 19 and 20 Bar to hold Armature fan 2 Put 1R139 on Crank housing facing 13mm notch to Barrel side Crank pin at the closest position to Ba...

Page 10: ...d 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 16 4 remove Crank shaft as illustrated in Figs 19 and 20 M8x40 Hex Socket head bolt 5 Lock Armature and set 1R139 Flat washer 8 and M8x40 Hex socket head bolt as illustrated in Fig 20 again tighten the M8x40 Hex socket head bolt wi...

Page 11: ...t to Impact bolt as illustrated right Note Rubber ring 20 has to be assembled so as to contact closely to Ring 20 without any gap Rubber ring 20 Flat washer 23 Tool holder Insert Cylinder section into Barrel Insert Striker into the Cylinder so that the protrusion of Striker faces Tool holder side Flat washer 34 Guide ring M6x25 Hex socket head bolt 4pcs ASSEMBLING ASSEMBLING 1 Assemble Crank housi...

Page 12: ...ing Housing cover See Fig 10 4 Disconnect Carbon brush from Armature s commutator as illustrated in Fig 30 Carbon brush Carbon brush Spiral spring Detach Spiral spring from Carbon brush Note It is not necessary to remove Carbon brush completely from Brush holder set By pulling Carbon brush disconnect its contact with Armature s commutator Disassemble Rear cover from Motor housing Rear cover 4x18 T...

Page 13: ...g Air pipe and Piston as illustrated in Fig 16 3 Remove Crank shaft from Crank housing as illustrated in Figs 19 and 20 4 Remove Armature using 1R306 1R239 1R023 and arbor press as illustrated in Fig 32A Crank housing Armature can be removed by striking Crank housing with plastic hammer Crank housing Put Crank housing on 1R023 Set 1R306 to ram of Arbor press Press down Armature using 1R239 Armatur...

Page 14: ...6 Unscrew 5x25 Tapping screws So Vibration absorbing handle can be disassembled in five parts as illustrated below 3 In case of HM0871C the Vibration absorbing handle section can be disassembled as illustrated in Fig 35 Assemble Handle section as illustrated in Fig 36 Dust Cover Support Dust cover support Assemble Dust cover support to Handle base facing its Triangle mark to Back side When assembl...

Page 15: ... following bolts to the specific fastening torque 7 8 11 7 N m M6 x 25 Hex socket head bolt Barrel Crank housing complete Housing cover 4 Fastening Barrel to Crank housing complete 2 9 3 4 N m M5 x 25 Hex socket head bolt 1 Fastening Housing cover to Barrel Item No Fastening torque Q ty Description Use for 25 42 42 25 25 Striker Cylinder 32 Piston Impact bolt Tool holder Chuck cover 7 19 20 7 31 5...

Page 16: ...g D 1 HM0870C without No Load Speed Suppression Note in wiring 6 3 1 9 2 9 5 LOT No LOW 6 3 1 9 3 0 0 LOT No HIGH HM0871C with No Load Speed Suppression 6 3 1 9 3 1 8 100 130V 220 240V LOT No LOW 6 3 1 9 3 2 6 LOT No HIGH Indication for 110V 127V area Indication for 220V 240V area HM0870C without No Load Speed Suppression HM0871C with No Load Speed Suppression Controller for HM0870C is different f...

Page 17: ...ave to be put on both side of Boss And connect them to Switch and Terminal Lead unit s Lead wires bundled with Polyethylene tube has to put under Terminal block Boss Terminal block Sponge sheet Connector of Lead unit Put the following Lead wires of Lead unit into Sponge sheet Lead wire black for connecting to Switch Lead wire black for connecting to Terminal block Lead wire white for connecting to...

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