ECHNICAL INFORMATION
PRODUCT
T
P 1/ 20
HM1214C
Model No.
Description
Demolition Hammer
CONCEPT AND MAIN APPLICATIONS
Model HM1214C is a 10kg-class demolition hammer adapted for
SDS-MAX bits.
The main features are as follows:
AVT (Active dynamic vibration absorber)
for reduced vibration during chipping
Suppression of motor speed during no-load
for reduced vibration when idling
In-line tool design optimum for downward vertical applications
High work efficiency
Dimensions: mm (")
Length (L)
Width (W)
Height (H)
700 (27-1/2)
129 (5-1/8)
265 (10-3/8)
Specification
Continuous Rating (W)
Voltage (V)
Cycle (Hz)
Max. Output (W)
Current (A)
Input
1,510
---
Output
700
700
110
120
220
230
240
15
14
50/60
50/60
50/60
50/60
50/60
1,600
1,600
1,800
1,800
1,800
7.8
7.8
7.8
1,510
1,510
1,510
750
750
750
Impacts per min: min-1=ipm
Shank type
950 - 1,900
Adapted for SDS-MAX bits
18 (11/16)
Shank diameter: mm (")
AVT (Active dynamic
Vibration
absorption
Yes
vibration absorber)
Vibration absorbing handle
No
Variable speed control by dial
Yes
Electronic
control
Soft start
Yes
Yes
Constant speed control
Suppression of motor speed
during no-load
Yes
Double insulation
Yes
Europe, Korea, Cyprus: 4.0 (13.1)
Brazil: 2.0 (6.6)
Power supply cord: m (ft)
Other countries: 5.0 (16.4)
Net weight: kg (lbs)
11.7 (25.8)
Weight according to
EPTA-Procedure 01/2003: kg (lbs)
12.3 (27.1)
Standard equipment
Side handle (D-shaped) ........... 1
Bit grease .................................. 1
Bull point .................................. 1
Plastic carrying ........................ 1
Cleaning cloth .......................... 1
Note: The standard equipment for the tool shown above may vary by country.
Optional accessories
Bull points
Grooving chisel
Clay spade
Bushing tool
Rammer
Grease vessel (containing 30g hammer grease)
Plastic carrying case
Safety goggles
Cold chisels
Scaling chisels
Scaling chisel (for Tile)
Hammer service kit
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P 2/ 20
Repair
CAUTION: Remove the hammer bit from the machine and disconnect the Machine from
power source for safety before repair/ maintenance in accordance with the
instruction manual!
[1] NECESSARY REPAIRING TOOLS
Code No.
Description
Use for
1R003 Retaining ring S pliers ST-2N Removing Ring spring 26
1R212 Tip for Retaining Ring Pliers Attaching to 1R003, when removing Ring spring 26
1R023 Pipe Ring (for Arbor press) Removing Ball bearing
Press Tool (for Arbor press)
Bearing setting pipe 28-20.2
1R024
1R031
Pressing down Slide sleeve for easy removing of Ring spring 43
Assembling Helical gear 52
Gear extractor (large)
Center Attachment
Gear extractor (large)
1R045
1R346
1R165
Removing Counter shaft
Attaching to 1R045, when removing Counter shaft
Supporting Crank shaft for assembling Helical gear 52
Taper sleeve
1R214
1R217
1R228
1R230
1R231
1R246
Fitting Fluoride ring 28 on Impact bolt
Removing / Assembling Crank shaft
Removing M4 Hex socket head bolts
Removing M6 Hex socket head bolts
Removing M8 Hex socket head bolts
Removing M8 Hex socket head bolts
Ring 22
1/4” Hex Shank bit for M4
1/4” Hex Shank bit for M6
1/4” Hex Shank bit for M8
Round Bar for Arbor 18-100
Round Bar for Arbor 20-100
Bearing Extractor
1R247
1R263
1R269
Removing Ball bearing 6203LLB
Separating Cylinder 40 and Motor housing from Crank housing
Removing Ball bearing 6000DDW from Commutator end of Armature
Bearing Extractor (small)
1R291 Retaining ring S & R pliers Removing Retaining ring S-8 from Counter shaft
Ring spring removing Jig
1R306
Disassembling AVT mechanism
1R363 Ring spring removing tool
Pressing down Flat washer 30 for easy removing Ring spring 26
[2] LUBRICATIONS
[2] - 1 Tool holder section
Apply Makita grease N.No.2 to the following portions designated with the gray triangle to protect parts
and product from unusual abrasion.
Item No. Description
Portion to lubricate
1
5
Tool holder cap Rip portion
Rubber ring 30 Inside where Tool holder contacts
Chuck ring
Tool retainer
Change ring
Rock ring
Inside where 8 Tool retainers contact
6
8
The belly portion where Hammer bit contacts
Inside which 14 Lock ring accepts
13
14
Its inside where Tool holder contacts
Tool holder section
Fig. 1A
13
14
1
5
6
8
Change ring cover
Chuck cover
Tool holder
Release cover
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P 3/ 20
Repair
[2] LUBRICATIONS
[2]-2 Hammer section
Apply Makita grease R.No.00 to the following portions designated with the black triangle to protect parts
and product from unusual abrasion.
Item No. Description
Portion to lubricate
a Inside of Tool holder guide which accepts Tool holder
b Inside of Barrel complete for smooth moving of Weight guide of AVT.
18
Barrel complete
24
25
X ring 21
Out side for smooth moving of Impact bolt in Tool holder
Fluoride ring 28
a Apply approx. 10g grease for smooth moving of Striker and Impact bolt
b Apply approx. 10g grease for smooth moving of Striker and Piston
Drum portion for smooth moving of Connecting rod
35
Cylinder 40
Pin 12
44
Fig. 1B
Fig. 1C
Barrel and AVT mechanism
Weight guide, covering
Counter weight
Cylinder section
Shoulder sleeve
Piston
Connecting
rod
b
18
Counter weight
35
Striker
a
b
25
24
Impact bolt
44
Slide sleeve
a
35
Rubber ring 24
Compression spring 58
Tool holder guide
(factory-assembled) Cylinder guide
[2]-3 Gear and Crank section
Apply Makita grease N.No.1 and Makita grease R.No.00 to the following portions designated with the black triangle to
protect parts and product from unusual abrasion.
Item No.
55
Description
Oil seal 20
Portion to lubricate
a little of Makita grease R No. 00
a Gear room for smooth engaging of Gears approx. 50g Makita grease N.No.1
Lip portion
61
Crank housing complete
Needle bearing 1613
b Crank room
approx. 60g Makita grease R No. 00
65
Needle portion where Counter shaft is accepted a little of Makita grease R No. 00
Fig. 1D
Gear and Crank section
Helical gear 52
55
a
Gear complete 34-48
61
b
Ball bearing 6304LLU
Crank shaft
Counter shaft
65
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P 4/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Chuck section
DISASSEMBLING
Remove Handle section and Controller cover so that you can stand the machine for easy repairing of the section except
Motor and Crank section. See Fig. 2.
Chuck section can be disassembled as illustrated in Figs. 3 and 4.
Fig. 2
Separating Handle section, remove Controller cover by
disconnecting Controller’s connector from Brush holder
unit. Electrical parts (Switch, Controller, Power supply
cord) can be removed as a unit.
You can stand the Machine for easy repairing
of these sections.
Switch
Controller
cover
M6x30 Hex
socket head
bolt (4pcs.)
Controller
Power supply cord
Handle section
4x18 Tapping
Screw (2pcs.)
Fig. 3
Remove Tool holder
Pressing down Flat Washer 30 with
1R363, remove Ring spring 26.
The following parts can
be removed.
Ring spring 26, Flat
washer 30 and Tool
holder come into sight.
cap.
Socket
Wrench 13
Tool holder cap
1R363
Ring
Flat washer 30
spring 26
Chuck cover
Rubber ring 30
Chuck ring
Flat washer 30
1R212
slotted head screwdriver
Release cover
Fig. 4
Remove Retaining ring WR-45.
Change ring can be separated
from Change ring cover.
Remove Change
ring cover.
Change ring will
come with it.
Remove Tool retainer,
pressing down Spring
guide.
Remove Spring guide and
Compression spring 56.
Retaining ring
WR-45
Spring guide
Retaining ring
WR-45
Change
ring
Spring guide
Compression
spring 56
Change
ring cover
Change
ring cover
Change
ring
Tool retainer
Tool retainer
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P 5/ 20
Repair
Fig. 5
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Chuck section
ASSEMBLING
(1) Do the reverse step of Disassembly. Refer to Figs. 4and 3.
However, assemble Handle section before mounting
Tool holder cap.
Put Tool holder cap on ground,
and push Tool holder to
Tool holder cap while making
use of the machine weight.
(2) Assemble Tool holder cap as illustrated in Fig.5.
Tool holder cap
[3]-2. Barrel section
DISASSEMBLING
(1) Remove Handle section and Controller Fig. 6
cover to hold the machine upright.
(Fig. 2)
(2) Separate Barrel section from Crank
housing complete, and remove Impact
bolt from Barrel section. (Fig. 6)
(3) Disassemble Cylinder and Striker as
illustrated in Figs. 7 and 8.
Separate Barrel, Barrel cover and
Chuck section from Crank housing
complete as illustrated below.
Push the removed Barrel
section with screwdriver
inserted from Tool holder
cap. Impact bolt can be
removed from Barrel
section.
No need to
disassemble
Chuck section.
M8x30 Hex
socket head
bolt (4pcs.)
Impact bolt
Shoulder
sleeve
M6x30 H.S
head bolt
with GM
Rubber
ring 24
Impact bolt
Shoulder sleeve
Rubber ring 24
Fig. 8
Fig. 7
Take out Striker from
Cylinder 40, and
Remove O ring 31.5
from Striker.
Put 1R023 onto Crank housing
as illustrated below.
Remove Cylinder 40 and Pin 6, as illustrated below.
The component parts of AVT come with Cylinder 40.
Components
of AVT
1R023
Striker
Pull off Pin 6
after removing
Cylinder.
Cylinder 40
1R263
1R023
O ring 31.5
Note: Even after removing Cylinder 40, do not lay Crank housing
complete,
Pin 6 (a component of AVT) can easily fall out of Crank
housing complete.
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P 6/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Barrel section (cont.)
DISASSEMBLING
(4) The components of AVT can be removed from Cylinder 40 (Figs. 9
Fig. 9
Fig. 10
Pressing down Slide sleeve as
Remove O ring 36 and Ring 45 from
illustrated below, remove Ring
spring 43.
Crank housing side of Cylinder 40 as
illustrated below.
Ring spring 43 still remains on the
Cylinder as a stopper for Slide sleeve.
1R024
or
1R306
1R356
Tool holder side
Ring
spring 43
Crank housing side
Slide sleeve
Ring 45
O ring 36 (3pcs.)
Slide sleeve
Fig. 11
After removing Ring spring 43, the component parts of AVT are removed from Cylinder 40 as illustrated below.
Component parts of AVT
Compression spring 58
O Ring 41
Cylinder 40
Cylinder
guide
Weight
guide
Counter
weight
Slide Ring spring 43
sleeve
ASSEMBLING
(1) Assemble O ring 41 to Cylinder 40. And assemble the component parts of AVT. (Fig. 11)
(2) Secure the component parts of AVT with Ring spring 43. (Fig. 10)
(3) Assemble Ring 45 and 3 pcs. of O ring 36 to Cylinder 40. (Fig. 9) The assembling of Cylinder section is finished.
And mount it to Crank housing as illustrated in Fig. 12.
Fig. 12
Do not forget to assemble Pin 6
for AVT mechanism.
Aligning Cylinder hole to Piston,
insert Cylinder into Crank housing
complete by striking.
Facing O Ring 31.5 assembled
side to Crank housing complete,
insert Striker into Cylinder 40.
Striker
Pin 6
O ring 31.5
Piston
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P 7/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Barrel Section (cont.)
ASSEMBLING
(4) If the wearing away on Fluoride ring 28 is recognized in the step of Fig. 6, all the Rings on Impact bolt have to be
replaced as illustrated in Fig. 13.
Fig. 13
X ring 21
In the following cases all the Rings on
Fluoride ring 28
Impact bolt have to be replaced.
(the worn one)
* When carbon brush is replaced.
* O ring 23 (orange) shows hrough
the worn Fluoride ring 28.
O ring 23
Impact bolt
Assemble of Rings to Impact bolt
Before Correction:
Rings' edges are protruding from the top edge
of the groove on Impact bolt.
After Correction:
Rings' edges are positioned under the top
edge of the groove on Impact bolt.
Correction
Impact bolt
Taper sleeve
(No.1R214)
Corrected
Fluoride ring 28
X ring 21
O ring 23
Insert Impact bolt from
the HR5001C side of
the Taper sleeve. And
keep it aprox. 60 sec. in
the Taper sleeve.
groove on Impact bolt
(4) Assemble Barrel complete to Cylinder 40 as illustrated in Fig. 14.
Fig. 14
1. Insert Impact bolt into
Tool holder mounted
in Barrel complete
Tool holder in Barrel complete,
fits to this Concave.
2. Put Shoulder sleeves and
Rubber ring 24 onto the
Cylinder 40.
3. Assemble Barrel complete
to Cylinder 40 while fitting
Tool holder to Shoulder
sleeve’s concave.
Tool holder
Barrel
complete
The tail of Impact bolt is
passed through these holes.
Shoulder sleeve
Rubber ring 24
Shoulder sleeve
Cylinder 40
Impact bolt
Cylinder 40
Cylinder 40 fits to this Concave.
(5) Secure the Barrel complete with four M8x30 Hex socket head bolts and one M6x30 Hex socket head bolt
together with Barrel cover. Refer to the left illustration in Fig. 6.
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P 8/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Tool holder section
DISASSEMBLING
(1) Disassemble Chuck section as illustrated in Figs. 3 and 4.
(2) Disassemble Tool holder as illustrated in Fig. 15.
Fig. 15
Separate Barrel section from Crank housing complete.
And pull off Barrel section from Barrel cover.
Removing Ring spring 35, disassemble Tool holder
by striking it with plastic hammer.
Ring spring 35
M8x30 Hex
socket head
Barrel cover
bolt
M8x30 Hex
socket head
bolt
M6x30 H.
s head bolt
with GM
Tool holder
Flat washer 39
O ring 35.5
Rubber ring 39
ASSEMBLING
Barrel complete has to be assembled so that the notch is located on the opposite side of M6 bolt hole. (Fig. 16)
Fig. 16
Barrel complete
Notch of Barrel
complete
Hole for M6 Bolt bored on
Crank housing complete
Crank housing complete
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P 9/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Piston, Crank section
DISASSEMBLING
(1) Remove Handle section and Controller cover to hold the machine upright. (Fig. 2)
(2) Separate Barrel section from Crank housing complete (the left illustration in Fig. 6)
(3) Disassemble Cylinder section (Fig. 7)
(4) For repairing Piston & Crank section, Motor section has to be separated from Crank housing complete.
Separate Motor housing from Crank housing complete in order of Figs. 17 and 18.
Fig. 17
Disassemble Gear cover, and then,
remove Flat washer 14 and Gear
complete 34-48.
And then, remove two Needle
gauges and Flat washer 14.
Disassemble Rear cover.
So, Motor housing comes
into your sight.
Needle gauge
1412 (2pcs.)
Helical gear 52
M6x30 Hex socket
head bolt (6pcs.)
Flat washer 14
Gear cover
Motor
housing
Flat washer 14
Gear
complete 34-48
Rear cover
M6x30 Hex socket
head bolt (6pcs.)
Turn Helical gear 52 until Piston comes
out from Crank housing complete.
O rings on Piston can be replaced in this
step.
Piston
Fig. 18
Disconnection of the Contact of Carbon brush with Commutator
Carbon brush is pressed with
Spiral spring to maintain its
contact with Armature's
Spiral spring
commutator.
Carbon brush
Carbon brush
Spiral spring
Detach Spiral spring
from Carbon brush.
Remove Motor housing by levering
it up with 2 pcs. of 1R263 as
illustrated below.
By pulling Carbon brush,
disconnect the contact with
Armature's commutator.
1R263
Carbon brush
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P 10/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Crank housing section (cont.)
DISASSEMBLING
(5) Disassemble Bearing box section in order of Figs. 19 to 24.
Fig. 19
Fig. 20
Pull off Filter case from Bearing box after removing
Filter case cover.
Even after removing Motor housing, Armature
still remains in Crank housing complete.
Disassemble Armature by striking the edge of
Crank housing complete as illustrated below.
Filter case cover
Filter case
Armature
Bearing box
complete
Fig. 21
Remove Pin 8 that functions for AVT in combination
with Pin 6. Pay attention not to lose Pin 8.
After unscrewing M6x25 Hex Socket head bolts,
remove Bearing box by twisting two slotted head
screwdrivers inserted between Crank housing
complete and Bearing box complete.
Bearing box complete
M6x25 Hex socket
Bearing box
complete
head bolt (3pcs.)
Pin 8
Fig. 22
Counter
shaft
Remove Retaining ring S-8, and
push out Counter shaft with 1R045.
Shoulder washer 8 and Needle
bearing 1613 can be removed from
Bearing box complete together
with Counter shaft.
1R045
1R291
Remove Retaining ring R-25, Ball
bearing 608ZZ and Grease cap.
Counter shaft
Retaining ring S-8
Bearing box
complete
Grease cap
Retaining
ring R-25
Counter shaft
Shoulder
Needle bearing 1613
washer 8
Ball bearing 608ZZ
Pin 8
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P 11/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Crank housing section
DISASSEMBLING
Fig. 23
Fig. 24
O ring 72 and O ring 14 can be removed from
Filter case cover and Filter case (Re: Fig. 20)
can be disassembled.
Bearing box complete and Grease cap
Bearing box complete
Grease cap
O ring 18
Filter case
Filter
O ring 45
O ring 14
Filter case cover
O ring 71
(6) In the step of Fig. 21 (after removing Bearing box complete), Piston can be disassembled from Crank housing
complete as illustrated in Fig. 25.
Fig. 25
Align Piston, Connecting rod and Crank shaft
on their center line by turning Crank shaft, .
Piston can be removed from Crank housing
complete together with Connecting rod.
Crank shaft
Piston
Piston
Connecting rod
Crank housing complete
Connecting rod
(7) Crank shaft section can be disassembled as illustrated in Fig. 26.
Fig. 26
To stabilize Crank housing during
disassembly, put it onto 1R217.
And apply 1R246 to Crank shaft
and press down Crank shaft.
Helical gear 52 and Crank
shaft section are disassembled
as illustrated below.
Apply 1R247 to Ball bearing
6203LLU from Bearing box
complete side, and press down
Ball bearing 6203LLU.
Helical gear 52
Ball bearing
6203LLB
1R246
1R247
Crank housing
complete
Crank Shaft
Ball bearing
6304LLU
1R217
Crank Shaft
Oil seal 20
Ball bearing 6203LLB
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P 12/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Crank housing section
ASSEMBLING
(1) Assemble Crank shaft with Ball bearing 6304LLU to Crank housing complete as illustrated in Figs. 27 and 28.
Fig. 27
Facing the lip portion to the side of box for Ball bearing
6304LLU (large Bearing), assemble Oil seal 20 by
pressing down until they stop.
Assemble Ball bearing 6304LLU
to Crank shaft as illustrated below.
Oil seal 20
1R031
Lip portion
Crank shaft
of Oil seal 20
Ball bearing
6304LLU
Side of box for Ball bearing
6304LLU (large bearing)
1R217
Fig. 28
Setting Crank housing complete on 1R217,
assemble the Crank shaft with arbor press as
illustrated below. And then turn Crank housing
complete.
Assemble Ball bearing 6203LLB. And then, assemble
Helical gear 52 as illustrated below.
Put it onto 1R165 while aligning the assembled
Crank shaft to the 1R165.
Crank shaft
1R031
Crank shaft
1R031
Ball bearing
6203LLB
Helical
gear 52
1R165
Crank shaft
Crank housing
complete
1R217
Note in Assembly
3 - 4 mm
Boss
Gear
housing
Crank shaft
Helical gear 52
Helical Gear 52 has to be assembled so that Crank shaft protrudes
approx. by 3 - 4 mm from the Helical gear 52.
The protruding portion of Crank shaft is accepted by the boss of
Gear housing.
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P 13/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Crank housing section (cont.)
ASSEMBLING
(2) Assemble Piston together with Connecting rod to Crank shaft. Refer to the right illustration in Fig. 25.
(3) Assemble Bearing box complete as illustrated in Figs. 29 to 31.
Fig. 29
Ball bearing 608ZZ
Bearing box
complete
Assemble Ball bearing 608ZZ to Bearing box.
And secure the Ball bearing with Retaining ring R-25.
Retaining
ring R-25
Fig. 30
Insert Needle bearing 1613 and Shoulder washer 8 over Counter shaft. Assemble Counter shaft
to Bearing box complete by pressing down with arbor press.
Shoulder washer 8
Brim portion
Needle
bearing 1613
Bearing box
Complete
Counter shaft
When assembling Shoulder washer 8,
face the brim portion to Needle bearing side.
Fig. 31
Retaining
ring S-8
Counter shaft
Turning Bearing box complete, mount Retaining ring S-8 to
Counter shaft.
The assembled Bearing box complete is ready to be mounted
to Crank housing complete in the next step.
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P 14/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Bearing box section, Crank housing section (cont.)
ASSEMBLING
4) Mount Bearing box complete to Crank housing complete as illustrated in Figs. 32.
Fig. 32
Fit the Notch of Counter shaft to the pin portion of Crank shaft by turning Counter shaft with Wrench 7.
(Unless the notch of Counter shaft fits to the pin portion of Crank shaft, approx. 5mm gap arises between
Bearing box complete and Crank housing complete.)
Counter shaft
Wrench 7
Bearing box
complete
Crank housing
complete
Gap between Bearing box
complete and Crank housing
complete
Condition under Bearing box complete
The notch of Counter shaft does
not fit to the pin portion of Crank
shaft in this step.
The notch of Counter shaft fits to the pin portion
of Crank shaft. Bearing box complete can be exactly
mounted to Crank housing complete without any gap.
Wrench 7
Notch of Counter shaft
Pin portion of Crank shaft
5) Mount Gear complete 34-48 to Crank housing complete as illustrated in Figs. 33.
Fig. 33
When assembling Gear complete 34-48 and Needle gauge 112,
do not forget to mount two Flat washers as illustrated below.
Needle gauge 1412
Flat washer 14
(2pcs.)
Gear complete 34-48
Flat washer 14
(6) As for the further steps, do the reverse step of Disassembly.
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P 15/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-5. Motor section
DISASSEMBLING
(1) Remove Rear cover (with “AVT” mark) from Crank housing complete (Re: the right illustration in Fig. 17)
(2) Disconnecting Carbon brush from Armature’s commutator, separate Motor housing from Crank housing complete. (Fig. 18)
(3) Disassemble Armature, by striking the edge of Crank housing complete. (Fig. 19)
(4) Ball bearings on Armature can be removed as illustrated in Fig. 34.
Fig. 34
1R269
Insulation
washer
Remove Ball bearing 6000DDW,
and Insulation washer from the
Commutator end,
Ball bearing
6000DDW
1R024
Sealing screw and Ball bearing 6302LLU
are removed in one process by pressing
down with arbor press.
Sealing screw
1R024
Ball bearing 6302LLU
1R022
1R023
1R023
ASSEMBLING
Do the reverse step of Disassembly.
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P 16/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-6. Electrical parts in Handle section
DISASSEMBLING
(1) Remove Handle section from Crank housing and Motor housing. The following electrical Parts can be replaced as
illustrated in Fig. 2.
* Switch
* Controller
* Power supply cord
(2) Separate Handle cover from Handle. The parts for switching mechanism are disassembled as illustrated in Fig. 35.
Fig. 35
Handle cover
Handle
Leaf
spring
Switch lever
Slide lever
Switch
lever
4x18 Tapping screw
4x18 Tapping screw
4x18 Tapping screw
Disassemble Switch lever from Side lever by unscrewing
4x18 Tapping screw. And Remove Slide lever from Handle.
Pay attention not to lose Leaf spring in this step.
Unscrew 4x18 Tapping screw,
and remove Handle cover.
ASSEMBLING
(1) When replacing Switch in the step of Fig. 2, do not forget to assemble Rubber pin 4 to the illustrated position in Fig. 36.
Fig. 36
Rubber Pin 4
(green color)
Switch
(2) Mount Leaf spring to Slide lever, and assemble Slide lever to Handle. Fasten Switch lever to the Slide lever with
4x18 Tapping screw. And mount Handle cover to Handle. Refer to the illustrations in Fig. 35.
(3) Assemble the Handle section to Crank housing as illustrated in Fig. 37.
Fig. 37
Prong of
Switch Lever
Slide Lever
Tumbler of
Switch
Tumbler of Switch is controlled by the pronged portion of
Switch lever that is joined to Slide lever with 4x18 Tapping screw.
Fitting the Prong of Switch lever to Tumbler of Switch, assemble
Handle section to Crank housing complete.
Handle section
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P 17/ 20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-7. Fastening torque
Fasten the Bolts and Screws to the fastening torque listed in Fig. 38.
Fig. 38
Position
No.
Size of Hex Socket
Head Bolt
Used
Q’ty
Fastening
Torque
M8 x 35
M6 x 25
4
3
30 - 40 N.m
13 - 16 N.m
19
M6x30 Hex socket
head bolt (6pcs.)
M6x30 Hex socket
head bolt (1 pc.)
Gear cover
Handle
Barrel cover
19
Barrel complete
Crank housing complete
Bearing box complete
72
M6x30 Hex socket
head bolt (4pcs.)
Rear cover
M6x30 Hex socket
head bolt (6pcs.)
<Note in Assembling>
Applying ThreeBond 1342 or Loctite 242 to their thread,
tighten Hex socket head bolts illustrated above.
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P 18/ 20
Repair
[4] MAINTENANCE PROGRAM
When replacing carbon brush, it is recommended to replace the following parts at the same time for longer service life
of the machine. Refer to Fig. 39.
Removing old grease, apply the new grease to the portions in Figs. 1A to 1D of the clause of [2] LUBRICATIONS.
Fig. 39
Item No.
Descriptions
Tool Holder Cap
Rubber Ring 39
O Ring 35.5 on Tool holder
X Ring 21 on Impact bolt
Fluoride Ring 28 on Impact bolt
Item No.
Descriptions
O Ring 23 on Impact bolt
Rubber Ring 24
O Ring 31.5 on Striker
O Ring 31.5 on Piston
O Ring 35 on Piston
1
26
29
32
45
47
20
22
24
25
Ring spring 26
Flat washer 30
Chuck cover
1
24
Tool holder
25
26
20
Flat washer 39
22
29
Impact bolt
32
Shoulder
sleeve
Striker
45
Cylinder 40
Piston
47
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P 19/ 20
Circuit diagram
Fig. D-1
Color index of lead wires' sheath
Blue
Switch
Brown
3 1
This Lead wire is black for
This Lead wire is white for
some countries.
some countries.
Controller
Terminal Block
built in Controller
T2
T1
This Lead wire is black for
This Lead wire is white for
some countries.
some countries.
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P 20/ 20
Wiring diagram
Fig. D-2
wiring on Controller Cover
Do not protrude Terminals from the edge
of Controller cover when connecting them
to Switch.
Controller
Cover
Correct
Wrong
Switch
Terminal
Put Controller’s Lead wires for
connecting to Switch into the slit of
Sponge.
Sponge
Pay attention not to pinch the Lead wires
with the edge of Controller or Controller
cover (designated with hatching).
Cut the Power supply cord as
illustrated below.
approx. 30mm
Fig. D-3
Wiring of Carbon Brush’s Pig Tail
Correct
Wrong
Brim side
Brim side
Brim of Brush
holder unit
Brim of Brush
Holder Unit
Pig Tail
Spiral spring,
pinching Pig tail
Pig Tails
Root
Pig Tail’s
Root
Pig Tail
Spiral Spring, correctly
pressing Carbon Brush
Carbon
Brush
Carbon
Brush
Rear Cover Side
Rear Cover Side
Pig tail’s Root on the brim side of Spiral spring
does not pinch Pig tail by mistake when assembling.
Pig Tail’s Root on the Rear cover side
Spiral spring easily pinches Pig tail by
mistake when assembling.
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