Makita HM0871C, HM0870C User Manual

ECHNICAL INFORMATION

Models No.

HM0871C, HM0870C

PRODUCT

P 1/ 17

Description

Demolition Hammers

CONCEPT 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

Yes No

Specification

Voltage (V) Cycle (Hz)

110 120

220 230 240

Current (A)

12 10

5.8

50/60 50/60

50/60 50/60 50/60

HM0870CHM0871C

[The image above is HM0871C.]

Model No. Length (L) Width (W) Height (H)

Continuous Rating (W)

Input Output

1,100

---

1,100 1,100 1,100

450 450

500 500 500

Dimensions: mm (")

HM0870CHM0871C

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

230 (9)

Max. Output (W)

1,200 1,200

1,200 1,200 1,200

Model No. Impacts per min: min-1= ipm Shank type Adapted for SDS-MAX bits

Shank diameter: mm (")

Vibration absorption

Electronic control

Double insulation

Power supply cord: m (ft)

Net weight*1: kg (lbs) Net weight*2: kg (lbs)

*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.

AVT (Anti-Vibration Technology using

Active dynamic vibration absorber)

Vibration absorbing handle Variable speed control by dial Soft start

Constant speed control Suppression of motor speed

during no-load

Yes No

Europe, Hong Kong, Korea: 4.0 (13.1);

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

5.6 (12.4) 5.1 (11.1)

5.8 (12.8) 5.3 (11.6)

1,100 - 2,650

18 (11/16)

Yes Yes Yes

Yes

Standard equipment

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

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

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

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

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

HM0870CHM0871C

Optional accessories

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

P 2/ 17

Repair

[1] NECESSARY REPAIRING TOOLS

[2] LUBRICATIONS

Fig. 1

Code No.

1R003 Retaining ring S pliers ST-2N

1R212 Tip for Retaining ring pliers

1R005 Retaining ring R pliers RT-2N

1R089 Bearing extractor

1R023 When it is difficult to remove Armature from Crank housing complete.

When it is difficult to remove Ball bearing 6203LLU.

Pipe ring ( for Arbor press)

1R132 Nose 15-20 Attachment for 1R089 to remove Ball bearing 6203LLU 1R139 Drill chuck extractor

M8x40 Hex socket head bolt Flat washer 8

Removing Crank shaft

Attachment for 1R003 to remove Ring springs

1R214 Taper sleeve Fitting Fluoride ring on Impact bolt

1R229 1/4” Hex shank bit for M5

Unscrewing/ screwing M5 size Hex socket head bolt

1R230 1/4” Hex shank bit for M6

Unscrewing/ screwing M6 size Hex socket head bolt

1R239 Round bar for Arbor 10-100 When it is difficult to remove Armature from Crank housing complete. 1R269 Bearing extractor Removing Ball bearing 608DDW from Armature’s commutator end 1R288 Screwdriver magnetizer

Magnetizing screwdriver when removing Steel balls

1R291 Retaining ring S and R pliers

Removing Ring spring 34 when disassembling Barrel section

1R306 Ring spring 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

1 Tool holder cap

Tool retainer

Steel ball 4.8 (4pcs.)

Lip portion

Belly portion where Hammer bit contacts

Whole portion

Lock ring

Striker

Change ring

Tool holder

Makita grease N.No.2

Makita grease R.No.00

Cylinder guide

Guide ring

O ring 23 between Fluoride ring 28 and Impact bolt Note: Do not apply any grease to O ring 23 attached to Fluoride ring 28.

Piston

Pin of Crank shaft

51 53

Fluoride ring 28

Impact bolt

Ring 20

Rubber ring 20

Flat washer 23

O ring 24

Cylinder 32

O ring 46

Pin 8

O ring 26 Connecting rod

Crank housing complete

The surface where Tool holder contacts

Cylindrical portion of Striker side

Whole portion

The surface where 32 Cylinder contacts.

Inside between Striker and Piston.

Whole portion

The hole in which Crank shaft’s pin is inserted

Crank room

20g

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

DISASSEMBLING

(1) Remove Tool holder cap as illustrated in Fig. 2.

Remove Handle section by loosening four 5x25 Tapping screws, and then disconnect Lead unit from Controller.

Stand the machine upright. While pressing down Chuck cover,

remove Tool holder cap. And then, remove Chuck cover.

Fig. 2

Handle section

Lead unit

Controller

Note: It is not necessary to disconnect Switch and Power supply cord.

Chuck cover

Tool holder cap

P 3/ 17

Repair

[3] DISASSEMBLY/ASSEMBLY [3]-1. Chuck section

(2) Disassemble Chuck section as illustrated in Figs. 3 and 4.

2. Press down Flat washer 28 by turning Socket wrench to make Ring spring 25 free from the pressure 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 screwdriver inserted from Tool holder.

Fig. 3

Fig. 4

Flat washer 28

1R003

Flat washer 28

1R363

1. Pulling down Chuck cover, install 1R363 in the same way of SDS-MAX bit installation.

Socket wrench

Spring guide

Ring spring 25

Rubber ring 28

Chuck ring

Tool retainer

Spring guide

Plate

Compression spring 52

Steel ball 4.8 (4pcs.)

Screwdriver magnetized by 1R288

Lock ring

Change ring

5x25 Tapping screw (4pcs.)

1R212

P 4/ 17

Repair

DISASSEMBLING

(1) Disassemble Chuck section. (Figs. 2, 3 and 4) (2) Removing Retaining ring R-42, disassemble Tool holder section and take out Impact bolt. (Fig. 5) (3) Remove Fluoride ring 28 and O ring 23 from Impact bolt when Fluoride ring 28 is worn out as illustrated in Fig. 6.

2. Remove Flat washer 29 and Rubber ring 28.

3. Pull off Tool retainer from Barrel.

Fig. 5

Fig. 6

[3] DISASSEMBLY/ASSEMBLY [3]-2 Tool holder section

1. Tool holder is fixed to Barrel with Retaining ring R-42. Remove the Retaining ring R-42 with 1R005.

Barrel

Tool holder

Impact bolt

O ring 38

5. Remove O ring 38 from Tool holder.

4. Remove Impact bolt from Tool holder by pushing out with Screwdriver.

Retaining ring R-42

Flat washer 29

Rubber ring 28

Barrel

Tool holder

O ring 23 (color: orange)

Fluoride ring 28 (the worn one)

Impact bolt

Fig. 7

ASSEMBLING

Taper sleeve (No.1R214)

Impact bolt

Fluoride ring 28 is protruded from the groove on Impact bolt.

groove on Impact bolt

Fluoride ring 28

O ring 23

groove on Impact bolt

O ring 23

Fluoride ring 28 is fit into the groove on Impact bolt.

Outer surface 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 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.

When orange colored O ring 23 can be seen through Fluoride ring 28, Fluoride ring 28 and O ring 23 have to be replaced with new ones.

1) Insert Impact bolt securely into Taper Sleeve from HR5001C marking side.

2) Hold the Impact bolt for at least 60 seconds.

3) Then pull Impact bolt out of Taper sleeve.

Note: Once Fluoride ring is expanded, it does not shrink by itself. If you insert Impact bolt into Tool holder without shrinking Fluoride ring, Fluoride ring will be pinched and broken, or Impact bolt will loose smooth sliding action.

Note: If it is hard to pull out Impact bolt, insert a round bar from the opposite side and hit it slightly.

(1) First, disassemble Chuck section as illustrated in Fig. 2, 3 and 4. (2) Remove Housing cover as illustrated in Fig. 9.

Fig. 9

Fig. 10

[3] DISASSEMBLY/ASSEMBLY [3]-2 Tool holder section (cont.)

Housing cover

Remove Housing cover by unscrewing M5x25 Hex socket Head bolt. Active dynamic vibration absorber comes into sight.

Insert Screwdriver into the hole of Handle side, and push Spring guide in Active dynamic vibration absorber to be stuck as follows:

M5x25 Hex socket head bolt

Active dynamic vibration absorber

Spring guide has to be removed from Crank housing prior to the next step.

Spring guide

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)

DISASSEMBLING

ASSEMBLING

Short end Long end

Impact bolt

(2) Assemble Tool holder section by taking the reverse step of Fig. 5. Insert Impact bolt into Tool holder. Note: Face the short end of Impact bolt to Hammer bit insertion side. See Fig. 8. (3) Assemble Chuck section by taking reverse step of disassembly. Refer to Figs. 4, 3 and 2.

Fig. 8

Tool holder

Hammer bit insertion side

P 5/ 17

Repair

Pipe holder A

P 6/ 17

Repair

Fig. 11

Fig. 12 Fig. 13

Fig. 14

DISASSEMBLING

ASSEMBLING

[3] DISASSEMBLY/ASSEMBLY [3]-3 Active dynamic vibration absorber (exclusively for HM0871C) (cont.)

(4) The removed Active dynamic vibration absorber can be disassembled as illustrated in Fig. 11.

(1) Assemble a pair of Active dynamic vibration absorber. (Fig. 11) (2) Before fitting Active dynamic vibration absorber to the machine, take the steps in Figs. 12 and 13.

Pipe holders can be separated by turning and pushing Pipe holders each other illustrated above.

Pipe holder B

Pipe holder A

Pipe 16

Counter weight

Compression spring 12

Pipe holder support

O ring 18

Pipe holder B

Compression spring 12

Spring guide

O ring 8

Crank cap side

Spring guide

Spring 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 distinction of the direction of Barrel.

Insertion hole for Pipe holder support

Connector of Pipe holder support

Note: Do not insert Pipe holder supports as illustrated above.

Barrel

(3) Insert Pipe holder supports of Active dynamic vibration absorbers to holes on Barrel and Crank housing. (Fig. 14.) And push Active dynamic vibration absorbers parallel to the machine so as to pass the protrusion of Spring guides through the holes of Crank housing. (Refer to Figs. 12 and 10.)

M6x25 Hex socket head bolt

Active dynamic vibration absorbers

+ 11 hidden pages

Makita HM0871C, HM0870C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual