ECHNICAL INFORMATION
PRODUCT
T
P 1/ 17
Models No.
Description
HM0871C, HM0870C
Demolition Hammers
L
CONCEPT AND MAIN APPLICATIONS
H
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
W
[The image above is HM0871C.]
Dimensions: mm (")
Listed below are the specification differences between the two models.
Model No. HM0871C HM0870C
Length (L) 466 (18-3/8) 449 (17-3/4)
Width (W) 116 (4-9/16) 109 (4-1/4)
Model No.
HM0871C HM0870C
AVT*
Vibration absorbing handle
Suppression of motor speed during no-load
Yes No
Height (H)
230 (9)
*Anti-Vibration Technology using Active dynamic vibration absorber
Specification
Continuous Rating (W)
Voltage (V)
Current (A)
Cycle (Hz)
Max. Output (W)
Input
1,100
---
Output
450
450
110
120
220
230
240
12
10
50/60
50/60
50/60
50/60
50/60
1,200
1,200
1,200
1,200
1,200
5.8
5.8
5.8
1,100
1,100
1,100
500
500
500
Model No.
HM0871C
HM0870C
Impacts per min: min-1= ipm
Shank type
1,100 - 2,650
Adapted for SDS-MAX bits
18 (11/16)
Shank diameter: mm (")
AVT (Anti-Vibration Technology using
Yes
Yes
No
No
Vibration
absorption
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
Yes
Yes
Electronic
control
Yes
No
Double insulation
Yes
Europe, Hong Kong, Korea: 4.0 (13.1);
Brazil: 2.0 (6.6); Other countries: 5.0 (16.4)
Power supply cord: m (ft)
Net weight*1: kg (lbs)
Net weight*2: kg (lbs)
5.6 (12.4)
5.8 (12.8)
5.1 (11.1)
5.3 (11.6)
*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.
Standard equipment
Side handle (Bar- or D-shaped) ........... 1 Plastic carrying case ........................ 1
Bit grease .............................................. 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
Shank (for Bushing tool and Rammer)
Cold chisels
Scaling chisels
Scaling chisel (for Tile)
Grease vessel (containing 30g hammer grease)
Side handle (Bar-shaped/ D-shaped)
Safety goggles
Hammer service kit
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P 2/ 17
Repair
CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
[1] NECESSARY REPAIRING TOOLS
Code No.
1R003 Retaining ring S pliers ST-2N Removing Ring springs
1R005 Retaining ring R pliers RT-2N Removing Retaining ring (INT) round R-42
Description
Use for
1R023 Pipe ring ( for Arbor press)
1R089 Bearing extractor
1R132 Nose 15-20
When it is difficult to remove Armature from Crank housing complete.
When it is difficult to remove Ball bearing 6203LLU.
Attachment for 1R089 to remove Ball bearing 6203LLU
1R139 Drill chuck extractor
M8x40 Hex socket head bolt
Flat washer 8
Removing Crank shaft
1R212 Tip for Retaining ring pliers Attachment for 1R003 to remove Ring springs
1R214 Taper sleeve
Fitting Fluoride ring on Impact bolt
Unscrewing/ screwing M5 size Hex socket head bolt
Unscrewing/ screwing M6 size Hex socket head bolt
1R229 1/4” Hex shank bit for M5
1R230 1/4” Hex shank bit for M6
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
Magnetizing screwdriver when removing Steel balls
Removing Ring spring 34 when disassembling Barrel section
1R288 Screwdriver magnetizer
1R291 Retaining ring S and R pliers
1R306 Ring spring removing jig
1R363 Ring spring removing tool
When it is difficult to remove Armature from Crank housing complete.
Removing Ring spring 25
[2] LUBRICATIONS
Apply the following lubricants to the portions to protect the parts and product from unusual abrasion.
Item No.
Description
Tool holder cap
Tool retainer
Portion to lubricate
Lubricant Amount
1
7
Lip portion
Makita grease
a little
N.No.2
Belly portion where Hammer bit contacts
Whole portion
16
19
21
Steel ball 4.8 (4pcs.)
Fluoride ring 28
Impact bolt
The surface where Tool holder contacts
Cylindrical portion of Striker side
22
23
27
31
Ring 20
a little
Rubber ring 20
Whole portion
Flat washer 23
O ring 24
Makita grease
R.No.00
The surface where 32 Cylinder contacts.
Inside between Striker and Piston.
32
38
49
51
53
58
Cylinder 32
O ring 46
Pin 8
7g
Whole portion
a little
O ring 26
Connecting rod
The hole in which Crank shaft’s pin is inserted
Crank housing complete Crank room
20g
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.
Fig. 1
Change ring
Tool holder
19
7
Striker
1
16
31
21
Guide ring
32
Lock ring
22
49
23
27
Cylinder guide
Piston
38
53
50
58
51
Pin of Crank shaft
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P 3/ 17
Repair
[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
from Controller.
remove Tool holder cap.
And then, remove Chuck cover.
Note: It is not necessary to disconnect Switch and
Power supply cord.
Tool holder cap
Controller
Lead unit
Chuck cover
Handle section
5x25 Tapping screw (4pcs.)
(2) Disassemble Chuck section as illustrated in Figs. 3 and 4.
Fig. 3
Flat washer 28
Rubber ring 28
Chuck ring
1. Pulling down Chuck cover, install 1R363
in the same way of SDS-MAX bit installation.
2. Press down Flat washer 28 by
turning Socket wrench to make
Ring spring 25 free from the
Ring spring 25
pressure by Flat washer 28.
Socket wrench
1R363
3. Remove Ring spring 25 using
1R003 with 1R212.
Ring spring 25
1R212
Spring guide
1R003
Flat washer 28
4. Remove Flat washer 28, Rubber ring 28 and Chuck ring.
Remove four Steel balls 4.8 Remove Change ring
Fig. 4
While pressing down Spring
Remove Spring guide,
guide, push out Tool retainers Compression spring 52
with Slotted screwdriver
magnetized by 1R288.
together with Lock ring.
And separate Lock ring
from Change ring.
by screwdriver inserted from
Tool holder.
and Plate.
Lock ring
Screwdriver magnetized
by 1R288
Spring
Change ring
guide
Plate
Compression
spring 52
Steel ball 4.8
(4pcs.)
Tool retainer
Spring
guide
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P 4/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2 Tool holder section
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.
Fig. 5
1. Tool holder is fixed to
Barrel with Retaining
ring R-42.
Remove the Retaining
ring R-42 with 1R005.
2. Remove Flat washer 29
and Rubber ring 28.
4. Remove Impact bolt from
Tool holder by pushing
out with Screwdriver.
3. Pull off Tool retainer
from Barrel.
Tool holder
Retaining
ring R-42
Flat washer 29
Rubber ring 28
Barrel
Tool holder
Flat
washer 29
O ring 38
Barrel
Impact bolt
5. Remove O ring 38
from Tool holder.
Fig. 6
Fluoride ring 28
(the worn one)
O ring 23
(color: orange)
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.
Impact bolt
ASSEMBLING
(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.
Fig. 7
Fluoride ring 28
O ring 23
Outer surface of Fluoride ring 28
O ring 23
Impact bolt
Taper sleeve (No.1R214)
1) Insert Impact bolt securely into
Taper Sleeve from HR5001C
marking side.
2) Hold the Impact bolt for at least
60 seconds.
groove on Impact bolt
groove on Impact bolt
Fluoride ring 28 is protruded
from the groove on Impact bolt.
Fluoride ring 28 is fit into
the groove on Impact bolt.
3) Then pull Impact bolt out of
Taper sleeve.
Note: Once Fluoride ring is expanded,
it does not shrink by itself.
Note: If it is hard to pull out
Impact bolt, insert a round
bar from the opposite side
and hit it slightly.
Note: If it is hard to pull out Impact bolt,
insert a round bar from the opposite
side and hit it slightly.
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.
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P 5/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2 Tool holder section (cont.)
ASSEMBLING
(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
Short end Long end
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
Housing cover
Remove Housing cover by unscrewing
M5x25 Hex socket Head bolt.
Active dynamic vibration absorber
comes into sight.
M5x25 Hex
socket head bolt
Active dynamic vibration
absorber
(3) Remove Active dynamic vibration absorbers from the both side of the machine as illustrated in Fig. 10.
Fig. 10
Insert Screwdriver into the hole of Handle side,
and push Spring guide in Active dynamic vibration
absorber to be stuck as follows:
Insert two slotted screwdrivers between Crank housing and
Active dynamic vibration absorber, and then lever up
Active dynamic vibration absorber from Crank housing.
Spring guide tilted and stuck
in Pipe holder A
Spring guide
Pipe holder A
Crank housing
Spring guide has to be removed from
Crank housing prior to the next step.
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P 6/ 17
Repair
[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 O ring 18
Compression spring 12
O ring 8
Pipe holder A
Compression
O ring 18
Pipe holders can be separated by
turning and pushing Pipe holders
each other illustrated above.
Pipe holder A
Counter weight
spring 12
Spring guide
Pipe 16
ASSEMBLING
(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.
Fig. 12 Fig. 13
Protrude Spring guide from Pipe holder A Tighten M6x25 Hex socket head bolt designated with black
with Screwdriver
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
M6x25 Hex socket
head bolt
Protrusion as distinction
of the direction of Barrel.
Insertion hole
for Pipe holder A
Spring guide
Spring guide to be
protruded from
Pipe holder A
Insertion hole
for Pipe holder
support
(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.)
Fig. 14
Active dynamic
Crank cap side
Barrel
vibration absorbers
Connector of
Pipe holder support
Note: Do not insert Pipe holder supports
as illustrated above.
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P 7/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4 Piston, Striker, Cylinder
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.
Note: It is not necessay to remove Tool holder from Barrel.
Fig. 15
Remove Barrel from Crank housing
Separate Striker from Barrel, and then
remove O ring 24 from Striker.
Note: Do not lose Flat washer 34 between
Crank housing and Barrel.
Barrel
Flat washer 34
Barrel
Striker
O ring 24
Striker
M6x25 Hex socket
head bolt (4pcs.)
Fig. 16
M4x18 Pan
head screw (4pcs.)
Remove Crank cap, Seal ring, Air pipe
and Flat washer 34 from Crank housing.
And remove Piston together
with Connecting rod.
Crank cap
Connecting rod
Crank
shaft
Seal ring
Turning Crank shaft,
set Piston to the closest
position to Barrel side.
Air pipe
Piston
Crank shaft
Piston
Barrel
side
Crank housing
O ring 24
Pin 8
Piston
O rings on Piston can be
replaced .
O ring 26
Connecting rod
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P 8/ 17
Repair
[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. Pay attention to the tapped position.
Slide sleeve are removed from Cylinder section.
Cylinder Section
Ring 20
fit to the long drum side
of Impact bolt
Rubber ring 20
Flat washer 23
Guide ring
Slide sleeve
Barrel
Barrel
Cylinder 32
(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.)
Fig. 18
Ring spring 34
Cylinder 32
groove(A)
groove(B)
groove(C)
Ring 36
Compression
spring 37
1R291
Ring spring 34 (A)
Cylinder guide
Groove (A)
on Cylinder 32
O ring 46
Ring 36
Ring spring 34 (B)
Ring washer 34
(See Fig. 15.)
Compression
spring 37
Ring spring 34 (C)
Cylinder guide
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P 9/ 17
Repair
[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.
(4) remove Crank shaft as illustrated in Figs. 19 and 20.
Fig. 19
1. Keeping Crank shaft in the condition Crank pin is at the closest position to Barrel side,
hold Armature by inserting a bar into Armature fan.
Bar to hold Armature fan
2. Put 1R139 on Crank housing,
facing 13mm notch to Barrel side.
Barrel
side
Crank pin at the closest position
to Barrel side
Fig. 20
3. Putting Flat washer 8 on 1R139, drive M8x40
Hex socket head bolt to the center hole of
Crank housing through Flat washer 8.
4. Tighten the M8x40 Hex socket head bolt using
Hex wrench until Crank shaft is pulled off from
Ball bearing 6203LLU in Crank housing.
Bar to hold
Hex wrench
Armature fan
M8x40 Hex
socket head bolt
Bar to hold
Armature fan
Flat washer 8
Crank pin is locked
by 1R139.
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P 10/ 17
Repair
[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. 16.
(4) remove Crank shaft as illustrated in Figs. 19 and 20.
Fig. 21
Crank shaft can be removed
as illustrated below.
Remove Retaining ring
R-40 with 1R005.
Loosening M8x40 Hex socket head bolt
halfway, insert Crank shaft into the remaining
Ball bearing 6203LLU by tapping the M8x40
Hex socket head bolt.
Retaining ring R-40
M8x40 Hex
Socket head bolt
Flat washer 8
(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 with Hex wrench. So Ball bearing 6203LLU are removed as illustrated
in Fig. 22. If it is difficult to remove as illustrated in Fig. 22, remove Ball bearing 6203LLU as illustrated in Fig. 22A.
Fig. 22
Fig. 22A
Setting 1R132 into the inner ring
M8x40 Hex
socket head bolt
Crank shaft
of Ball bearing 6203LLU, pull off
Ball bearing 6203LLUwith 1R089.
Flat washer 8
1R089
1R132
Ball bearing 6203LLU
Ball bearing 6203LLU
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P 11/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-5 Crank shaft (cont.)
ASSEMBLING
(1) Assemble Crank housing section as illustrated in Fig.s 23.
Be careful that Crank shaft of HM0870C is different from that of HM0871Cas illustrated in Fig. 24.
(2) Assemble Piston to Crank pin while referring to the right illustration in Fig. 16.
(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
17mm
HM0871C
17.5mm
Retaining ring R-40
Center of
Ball bearing 6203LLU
Crank shaft
Wave washer 30
Crank housing
Set the above parts
in place.
Center of
Crank pin
[3]-6 Cylinder section
ASSEMBLING
(1) Cylinder section can be assembled as illustrated in Fig. 25.
Fig. 25
Assemble Cylinder guide to Cylinder 32 so that O ring 46
side of Cylinder guide faces Crank housing side.
Align the six protrusions of Guide ring to Slide sleeve
and assemble Guide ring to Slide sleeve.
Six protrusions
O ring 46
Slide sleeve
Crank housing
Side
Guide ring
Crank housing
side
Cylinder guide
Cylinder 32
Cylinder 32
(2) When assembling the parts which accept Impact bolt, put them into Guide ring as illustrated in Fig. 26.
Fig. 26
Rubber
ring 20
Guide ring
Ring 20
Impact bolt
Flat washer 23
Note: Ring 20 has to be assembled
Note: Rubber ring 20 has to be
so that its inner side can be fit to
Impact bolt as illustrated right.
assembled so as to contact closely
to Ring 20 without any gap.
(3) Assemble Cylinder section to Barrel as illustrated in Fig. 27.
(4) Assemble Flat washer 34 into Crank housing, and then assemble Barrel to Crank housing as illustrated in Fig. 28.
Fig. 27
Fig. 28
Flat washer 34
Insert Cylinder section into Barrel.
Insert Striker into the Cylinder so that the protrusion of Striker faces
Tool holder side.
M6x25 Hex socket
head bolt (4pcs.)
Protrusion
of Striker
Barrel
Cylinder section
Tool holder
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P 12/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-7 Controller
DISASSEMBLING
Controller can be removed as illustrated in Fig. 29.
Fig. 29
Unscrewing 4x12
Tapping screws,
remove Controller
by levering up
with two Slotted
screwdrivers.
Disconnect
Connector
From Controller.
Disassemble Handle section
by unscrewing four 5x25
Tapping screws.
Handle section
[3]-8 Armature
DISASSEMBLING
(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.
Fig. 30
Motor housing
Disassemble Rear cover from Motor housing.
Spiral spring
Detach Spiral spring
from Carbon brush.
Carbon brush
By pulling Carbon brush,
disconnect its contact with
Armature's commutator.
Carbon brush
Note: It is not necessary to remove
Carbon brush completely from
Brush holder set.
Rear cover
4x18 Tapping screw(2pcs.)
(5) Separate Motor housing by tapping with Plastic hammer as illustrated in Fig. 31R.
Fig. 31R
Fig. 31F
Do not tap Motor housing at the edge portion
illustrated below.
The edge of Motor housing is so thin that it may
be broken.
Tap Motor housing at the illustrated portion with Plastic hammer.
Armature can be removed together with Crank housing from
Motor housing.
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P 13/ 17
Repair
[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. Disassemble Barrel, Cylinder section as illustrated in Fig. 15.
2. Disassemble Crank cap, Seal ring, 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.
Fig. 32
Fig. 32A
Put Crank housing on 1R023.
Set 1R306 to ram of Arbor press.
Press down Armature using 1R239.
Armature can be removed by striking Crank
housing with plastic hammer.
Armature
1R306
Crank housing
1R239
1R023
Crank housing
Armature
(7) Armature can be disassembled as illustrated in Fig. 33.
Fig. 33
Ball bearing 6203LLB
Flat washer 12
Fan 76
Insulation washer
Ball bearing 608DDW
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P 14/ 17
Repair
[3]-9 Handle section
(1) Disassemble Handle section as per the left illustration in Fig. 29.
(2) Remove Handle cover by unscrewing 4x18 Tapping screw to replace the electrical parts in Handle. See Fig. 34.
Fig. 34
Remove 4x18 Tapping screw and Handle cover.
Switch and Power supply cord can be replaced.
Rubber pin 4 comes out after removing Switch.
Switch
Rubber pin 4
Handle cover
4x18 Tapping
screw
Power supply cord
(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.
Flat washer 5 (2pcs.)
Compression
spring 11
Dust Cover
Support
5x25 Tapping
screw (2pcs.)
Handle
Handle base
Dust cover
Handle
cover
ASSEMBLING
Assemble Handle section as illustrated in Fig. 36.
Fig. 36
Assemble Dust cover support to Handle base, facing its Triangle mark to Back side.
When assembling Dust cover to Dust cover support, face the >NBS< mark to
Triangle mark on Dust cover support.
Back side
Dust cover support
Triangle mark
“>NBS<” Mark
Dust cover
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P 15/ 17
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-10. Fastening torque
Fasten the following bolts to the specific fastening torque.
Item No.
Description
Q’ty Fastening torque
Use for
25
42
M6 x 25 Hex socket head bolt
M5 x 25 Hex socket head bolt
4
1
7.8 - 11.7 N.m Fastening Barrel to Crank housing complete
2.9 - 3.4 N.m
Fastening Housing cover to Barrel
25
Housing cover
Fig. A
Barrel
Crank housing complete
42
25
[4] MAINTENANCE PROGRAM
Replacing the following parts is recommended when Carbon brush is replaced.
Wipe off the old grease in the machine, and then apply the fresh grease in accordance with [2] LUBRICATIONS.
Item No. Description
1
Fig. B
1
7
Tool holder cap
Tool retainer
O ring 23
3
7
20
Chuck cover
51
3
O ring 26
Ring spring 25
Fluoride ring 28
O ring 24
19
19
Tool holder
31 50
Barrel
7
31
20
Impact bolt
Striker
50
51
Piston
Cylinder 32
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P 16/ 17
Circuit diagram
Fig. D-1
Color index of lead wires' sheath
Black
White
Polyethylene tube
Terminal block
Brown Lead wire is used
for some countries.
Blue Lead wire is used
for some countries.
Power supply cord
Wiring diagram
Fig. D-2
Note in wiring
Controller for HM0870C is different from that for HM0871C.
Indication for 110V-127V area
HM0870C
HM0871C
without No Load Speed with No Load Speed
Controller
Suppression
Suppression
6 3 1 9 3 1 - 8
LOT No.
LOW
6 3 1 9 2 9 - 5
LOT No.
LOW
100 - 130V
Indication for 220V-240V area
HM0870C
HM0871C
without No Load Speed with No Load Speed
Suppression
Suppression
6 3 1 9 3 2 - 6
LOT No.
HIGH
6 3 1 9 3 0 - 0
LOT No.
HIGH
220 - 240V
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P 17/ 17
Wiring 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.
* Lead wire (black) for connecting to Switch
* Lead wire (black) for connecting to Terminal
block
* Lead wire (white) for connecting to Switch
Sponge sheet
The Lead wires have
to be tightened in this
area.
Terminal block
Lead unit’s Lead wires bundled
with Polyethylene tube has to put
under Terminal block.
Boss
Connector of
Lead unit
Polyethylene
tube
Lead unit’s Lead wires
Lead unit’s Lead wires have to
be put on both side of Boss,
And connect them to Switch
and Terminal.
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