Makita HM1304 Handbuch

Continuous Rating (W)

Voltage (V) Cycle (Hz) Input Output Max. Output(W)

110 900

900

14.0 1,500

1,500

1,600

120 13.0

7.2

6.9

6.6

220

230

240

Models No.

Description

PRODUCT

Current (A)

HM1304B

HM1304B is the sister model of HM1304, and hex 28.6mm

(1-1/8") bit can be used with HM1304B.

And this new product conforms to requirements of

the new European noise regulation which will be effective

from 2006.

Demolition Hammer

TECHNICAL INFORMATION

CONCEPTION AND MAIN APPLICATIONS

Specification

Standard equipment

Optional accessories

< Note > The standard equipment for the tool shown may differ from country to country.

P 1 / 12

Dimensions : mm ( " )

Width ( W )

Height ( H )

Length ( L )

50 / 60

831 (32-3/4)

219 (8-5/8)

115 (4-1/2)

by double insulation

1,450

27.5

17.0 (37.5)

5.0 (16.4)

28.6 (1-1/8) hex

* Steel carrying case ............................ 1 pc.

* Bull point

* Cold chisel * Scaling chisel

* Clay spade * Rammer

Blows per min, :(bpm=min -1)

Protection from electric shock

Net weight :Kg (lbs )

Cord length : m ( ft )

Single blow energy : J

Shank : mm (")

Repair P 2 / 12

< 1 > Lubrication

Apply the grease a mentioned in the below list to protect parts and product from unusual abrasion.

Tool guide

Gear housing

Striker

Impact

bolt

Piston

Connecting

rod

12 13

26 25

Parts The portion to be lubricated The grease to be applied

MAKITA grease R No.00

The amount

to be applied: g (oz.)

Item

No.

1 Tool holder Inside where contacts hammer bit. 0.5 (0.02)

MAKITA grease R No.00

7 O Ring 24 0.5 (0.02)

MAKITA grease R No.00

9 Idler Inside where contacts impact bolt.

Inside where piston and striker

reciprocate

0.5 (0.02)

MAKITA grease R No.0012 / 13 O Rings 61 0.5 (0.02)

MAKITA grease R No.0015 X Ring 30 0.5 (0.02)

MAKITA grease R No.0022 O Ring 44 0.5 (0.02)

MAKITA grease R No.0019 O Ring 47 0.5 (0.02)

MAKITA grease R No.0025 Cylinder liner 5.0 (0.18)

Outside where contacts connecting

rod's hole. MAKITA grease R No.00

MAKITA grease R No.00

47 Needle

bearing 1715

The side where helical gear 57 and

helical gear 34 are mounted.

The portion where marked with

black arrow.

MAKITA grease N No.176 Gear housing

cover

0.5 (0.02)

30.0 (1.06)

MAKITA grease N No.1

78 Helical gear 57 30.0 (1.06)

64 Crank housing 60.0 (2.12)

MAKITA grease N No.190 Helical gear 34 30.0 (1.06)

MAKITA grease R No.00

26 O Ring 44 1.0 (0.05)

Seal holder

Crank shaft

Repair P 3 / 12

< 2 > Disassembling motor section

(1) Remove holder cap plate by unscrewing pan had screw M5x16. Remove rubber ring 6, brush holder cap

and carbon brushes. See Fig. 2.

(2) Remove handle set from crank housing by unscrewing hex socket head bolts M6x50 and M6x40.

However, the handle set can not be separated completely from motor housing in this step,

because it is still connected with lead wires. See Fig. 3.

(3) Unscrew hex socket head bolt M6x50. See Fig. 4.

(4) Strike crank housing as illustrated in Fig. 5. Then, motor housing can be separated from crank housing See Fig. 5.

(5) Strike crank housing as illustrated in Fig. 6. Then, Armature and baffle plate can be separated from crank housing

See Fig. 6.

Pan head

screws M5x16

Holder cap plate

Rubber ring 6

Brush holder cap

Carbon brush Rear cover

Hex socket head

bolts M5x18

Hex socket head

bolts M6x50

Hex socket head

bolts M6x40

Hex socket head

bolts M6x50

Fig. 2 Fig. 3

Fig. 4 Fig. 5

Fig. 6

Lead wires

Plastic hammer

Crank

housing

Baffle plate

Repair P 4 / 12

< 3 > Assembling motor section

Hex socket head

bolts M6x50

Fig. 8

Fig. 7 Hex socket head

bolts M6x40

Hex socket head

bolts M6x50

Fig. 9

Lead wires

Handle set

Pan head

screws M5x16

Holder cap plate

Rubber ring 6

Brush holder cap

Carbon brush Rear cover

Hex socket head

bolts M5x18

Fig. 10

(1) Make sure that seal has been previously mounted to armature. Mount armature and then baffle plate to

crank housing. See Fig. 7.

(2) Make sure that flat washer 18 has been previously mounted in the bearing assembling hole of motor housing

(rear cover side). Mount motor housing to crank housing by pressing. Fasten it with hex socket head bolts

M6x50. See Fig. 8.

(3) Mount handle set. Fasten it with hex socket head bolts M6x50 and hex socket head bolts M6x40. See Fig. 9.

Be careful, not to pinch lead wires with handle set in this step.

Crank

housing Motor

housing

Armature

Baffle plate

(4) Mount rear cover and fasten it with hex socket head bolts M5x18. Mount carbon brushes and fasten it with

brush holder cap, rubber ring 6 and holder cap plate. See Fig. 10.

Flat washer 18

Seal

Repair P 5 / 12

< 4 > Removing barrel section from crank housing

(1) Take off hex socket head bolts M6x45 and insert slotted head screwdriver into the gap between gear housing cover

and gear housing. Lever up gear housing cover with the inserted screwdriver. Then, gear housing cover can be

separated from gear housing See Fig. 11.

(2) Remove crank cap from crank housing. Then, you can see hex socket head bolt M6x18 with which connecting rod

and crank shaft are connected. See Fig. 12.

(3) Take off hex socket head bolt M6x16, flat washer 6 and needle bearing 1715. Then, gear housing (including helical

gear 57, helical gear 34, crank shaft armature etc,) can be separated from crank housing. See Fig. 13.

(4) Take off hex socket head bolts M10x40. And then, separate barrel from crank housing. See Fig. 14.

Fig. 11

Fig. 12

Fig. 13

Fig. 14

Hex socket head

bolts M6x45

Crank cap

Hex socket

head bolt M6x18

Crank housing

Needle bearing 1715

Flat washer 6

Hex socket

head bolt M6x18

Hex socket

head bolts M10x40

Be careful, not to lose pins 6.

Repair P 6 / 12

Fig. 15

Fig. 16

Fig. 17

(1) Take off hex socket head bolts M8x30 and remove tool holder from barrel. And take off inner parts from barrel.

See Fig.15.

(2) Put 1R032 "Bearing setting plate" into barrel. And remove cylinder liner from barrel by pressing the 1R032 put into

barrel with arbor press. See Fig.16.

Hex socket

head bolts M8x30

Adhesive is applied

to hex socket head

bolts M8x30

Tool holder

Barrel

< 5 > Removing cylinder liner from barrel

(1) Put No.1R201"Jig for Retainer Ring" on retainer ring, and pass No.1R282"Round Bar for Atbor" through the screw

hole for hex socket head bolt M8x30. Press the round bar for arbor with arbor press, so retainer ring is pressed sown.

And pin 4 can be removed. See Fig. 17. Retainer rings and compression springs 4 can be removed.

< 6 > Disassembling tool retainer section

1R218

Adjuster sleeves

Cylinder liner

Urethane ring 48 (2 pcs.)

Rubber ring 52

Seal holder

Tool guide

Flat washer 48

1R032

Bearing setting plate

Pin 4

Rounfr bar

for arbor

Retainer ring

Retainer rings

1R201

Jig for Retainer

Ring

Compression

spring 4

Compression

spring 4

Repair P 7 / 12

(2) Take off spring pins 8-40 by striking with hammer as illustrated in Fig. 18. Then, tool retainer section can be

disassembled as illustrated in Fig. 18A.

(1) Mount tool retainer poles to tool holder. And mount tool retainer. Mount retainer shaft by passing through

tool retrainer and tool retainer poles. See Fig. 19.

(2) Mount spring pin 8-40 as illustrated in Fig. 20. Mount compression springs 4 and retainer rings to tool retainer pole

as illustrated in Fig. 21. Put the jig for retainer ring on retainer ring and pressing the jig with arbor press,

mount pin 4. See Fig. 22.

(3) Mount tool retainer section to barrel as illustrated in Fig. 23.

< 7 > Assembling tool retainer section

Fig. 18

Fig. 19

Fig. 20 Fig. 21 Fig. 22

Fig. 23

Spring pin

extractor

Spring pins 8-40

Tool retainer pole

Tool retainer

Tool holder

Tool retainer

shaft

Tool retainer

pole Fig. 18A

Tool retainer poles Tool retainer

Tool retainer shaft

The cut portion has to

be faced to the bow portion

side of tool retainer.

Bow portion of

tool retainer

Cut portion of tool retainer shaft

Front view of tool retainer section

Tool holder

Spring pin

extractor

Spring pins 8-40

Pin 4

Round bar

for arbor

Retainer ring

1R201

Jig for Retainer Ring

Retainer rings

Compression

spring 4

Compression

spring 4

Tool retainer poles

Hex socket

head bolts M8x30

<Note> The adhesive has been applied to

hex socket head bolt M8x30.

They have to be always replaced

with the fresh one.

Tool holder Barrel

Repair P 8 / 12

< 8 > Assembling barrel section to crank housing

(1) Mount cylinder liner into barrel with arbor press. See Fig.24. And mount the parts to barrel as illustrated in Fig. 25.

(2) Mount tool holder and insert piston with connecting rod into barrel as illustrated in Fig 26.

Urethane ring 48

Rubber ring 52

Seal holder

Tool guide

Idler

Flat washer 48

1R032

Bearing setting plate

Cylinder liner

Barrel

Tool holder Barrel

O ring 44

O ring 47

O ring 44

Make sure that O ring 44, and

O ring 47 (for holding pin 12) have

been previously mounted to piston.

Make sure that O ring 67 has

been previously mounted to

crank housing.

Piston

Connecting rod

Needle bearing 1715

Flat washer 6

Hex socket

head bolt M6x18

Make sure that these pins 6. have been

previously mounted to the illustrated

positions respectively.

Hex socket

head bolts M10x40

(4 pcs.)

O ring 67

(3) Mount barrel as illustrated in Fig. 27.

Jointing connecting rod with crank shaft which

functions also as a shaft of helical gear 57,

mount gear housing section to crank housing.

Mount needle bearing 1715 and flat washer 6,

and fasten them with hex socket head bolt M6x18

for securing the joint of connecting rod and crank shaft.

See Fig. 28.

Crank shaft

Helical gear 57

Crank housing

Connecting rod

Fig. 24

Fig. 25

Fig. 26

Fig. 27

Fig. 28

Hex socket

head bolts M8x30

Tool holder

Repair P 9 /12

< 9 > Disassembling gear housing section

(1) Remove ball bearing 6302 from crank shaft with 1R044 "Small gear extractor". See Fig. 29.

(2) Holding bearing box mounted to gear housing, with 2 pcs. of round bars for arbor (approx. Ø30mm)

press the crank shaft and remove it from gear housing. See Fig. 30.

Be careful, not to lose woodruff key 4 in this step.

(3) Then, helical gear 57 and ring 25 can be separated from gear housing. See Fig.31.

Remove bearing box by unscrewing hex socket head bolts M6x22. Then, ball bearing 6205LLU can be separated

from gear housing. See Fig.32.

Crank shaft

Ball bearing

6302

1R044

Small gear extractor

Woodruff

Key 4

Crank shaft

Bearing box

Helical gear 57

Gear housing

Gear

housing

Gear

housing

2 x Round bar for arbor

with Ø30mm

Helical gear 57

Ring 25

Hex socket bolts

M6x22

Ball bearing

6205LLU

Bearing box

< 10 > Assembling gear housing section

(1) Mount ball bearing 6205LLU to bearing box. Fasten the bearing box with 4 pcs. of hex socket

head bolts M6x22. See Fig. 33.

(2) Mount crank shaft by pressing through ball bearing 6205LLU with arbor press. See Fig. 34.

(3) Mount ring 25 through crank shaft and insert woodruff key 4 into the groove of crank shaft. See Fig. 35.

Hex socket bolts

M6x22

Crank shaft

Bearing box

Gear housing

Ring 25 Woodruff key 4

Ball bearing

6205LLU

Bearing box

< Note > It is recommended to put grease into the groove of crank shaft to prevent woodruff key 4 from falling off

crank shaft at the mounting of helical gear 57.

Fig. 29

Fig. 30

Fig. 31 Fig. 32

Fig. 33

Fig. 34 Fig. 35

Repair P 10 / 12

< 11 > O ring and X ring

(1) Apply the grease to O rings and X ring for securing the function of grease pack system. The dust which can damage

the O ring, X ring and cylinder, has to be taken off.

(2) When inserting impact bolt into seal holder, be careful, not to damage the rip of X ring 30. See Fig. 39.

X ring 30

Impact bolt

(4) Aligning the cut portion of helical gear 57 with the woodruff key 4, mount helical gear 57 to crank shaft

by pressing crank shaft with arbor press. See Fig. 36.

(5) Mount ball bearing 6302 to crank shaft by pressing crank shaft with arbor press. See Fig. 37.

(6) Assemble helical gear 34 to which ball bearings 6001 and 6201 have been previously mounted, to gear housing.

See Fig. 38.

Woodruff key 4

Groove of

helical gear 57

Helical gear 57

Ball bearing 6302

Ball bearing 6201

Helical gear 34

Ball bearing 6001

< 12 > Assembling idler

Mount idler facing its large hole side to impact bolt as illustrated in Fig. 40A instead of Fig. 40B.

Fig. 40A

Fig. 40B

Rubber

ring 52

Tool holder

side

Impact bolt

side

Idler Impact bolt

Rubber

ring 52

Tool holder

side Impact bolt

side

Idler Impact bolt

The wrong installing of idler interferes

with the blow action, which is the cause

of the breakage of machine itself.

Fig. 36 Fig. 37

Fig. 38

Fig. 39

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