Makita HM1801 Manual

Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output(W)
110
120
220
230
240
16.0
15.0
9.6
9.2
8.8
50/60
AC/DC
50/60
50/60
50/60
1,700
1,700*1
2,000
2,000
2,000
950
950
1,240
1,240
1,240
2,300
2,300
2,500
2,500
2,500
Models No.
Description
PRODUCT
Current (A)
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
Note: The standard equipment for the tool shown above may differ by country.
P 1 / 18
HM1801
Electric Breaker
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 824 (32-1/2)
146 (5-3/4)
633 (25)
L
W
Model HM1801 has been developed as 28.6mm hex shank electric breaker
conforming to the permissible noise level limit of 2006 stage of European
Noise Directive for Outdoor Equipment.
Despite such low noise level, features highest-in-class chipping efficiency.
This model is the economy version of HM1810, not featuring AVT.
H
Hex wrench 5 ................ 1 pc
Bull point
Cold chisel
Scaling chisel
Clay spade
Rammer
Blows per min.: bpm=min-1
Model HM1801
Protection from electric shock
Net weight: Kg (lbs)
Power supply cord: m (ft)
Noise*2:
dB(A)
*2: Noise indicates sound power level.
*3: This is the permissible noise level limit of 2006 stage of the "European Noise Directive for Outdoor
Equipment" (2000/14/EC). And in and after 2006, it will be prohibited in Europe to sell the products
with the sound power level exceeding this noise level limit.
The values of the permissible noise level limit listed above are calculated by us in accordance with the
directive. (The calculation is based on the weight of product.)
*4: Vibration level on the catalog for European countries
*1: Continuous Rating Input: Taiwan=1,570W, UK (low voltage)=1,700W, Saudi Arabia (low voltage)=1,650W
Specification
Shank: mm (")
Anti-vibration
technology
Vibration*4: m/s2
1,100
5.0 (16.4) [brazil only: 2.0m (6.6ft)]
Hex 28.6 (1-1/8)
Double insulation
Permissible noise level limit*3
Guaranteed noise level on the
catalog for European countries
Impact energy: J (catalog value) 63
Vibration absorbing handle No
Counterweight mechanism
30 (66.2)
110
No
106
16

P 2 / 18
Repair
[1] NECESSARY REPAIRING TOOLS
CAUTION: Disconnect the machine from the power source for safety before repair/maintenance!
1R005 Retaining Ring R Pliers RT-2N
1R023 Pipe Ring (for arbor press)
Removing Retaining ring R-80 from Crank box
Removing Helical gear 47
1R045 Gear extractor, large
1R346 Center Attachment for 1R045 Disassembling Tool retainer section
1R347 Jig for Tool Retainer Disassembling
1R231 1/4" Hex Shank Bit for M8
1R263 Bearing Extractor
Loosening/ tightening Hex socket head bolt M8x75
1R348 Spring Pin Extractor Removing Spring pin 8-40 from Tool retainer shaft
Removing Ball bearings
1R269 Bearing Extractor
1R291 Retaining Ring S and R Pliers Removing Retaining ring S-20 from Crank shaft
784408-3 Socket Bit 13-55 Loosening/ tightening Hex nut M8 that secures Fan 100
Code No. Description Use for
[2] ADHESIVE APPLICATION AND LUBRICATION
[2] -1. Adhesive Application
Apply an appropriate amount of adhesive to the following parts in order to lock them against vibration loosening or
leakage. Be sure to wipe off grease or oil from the parts before adhesive application.
Tool holder
10 Brush holder cap (2pcs) Threaded portion
12 Hex socket head bolt M6x22 (4pcs)
22 Gear housing complete
Threaded portion
16 Hex bolt M5x85 (2pcs) Threaded portion
Figure 8 inlaid portion that contacts Gear housing cover
83 Hex socket head bolt M12x55 (4pcs) Threaded portion
Item No. Description Portion to apply adhesive
Threaded portion
94 Hex socket head bolt M12x45 (4pcs)
Fig. 1
22
: ThreeBond 1215
: ThreeBond 1321B or 1324,
or Loctite 242
Barrel
83
94
Gear housing cover
12
16
10
Bearing box
Motor housing B
Field
Motor housing A
Crank housing

P 3 / 18
Repair
[2] LUBRICATION
Apply Makita grease to the following portions designated with the black triangle and gray triangle to protect
parts and product from unusual abrasion.
Tool holder
Impact bolt
Striker
Impact bolt holder
85
Crank complete
Pin 15
22 Gear housing complete approx. 80g of Makita grease N No.1 in the gear chambers
24 Spur gear 22
35 Helical gear 50
appropriate amount of Makita grease N No.1 to the teeth portion
31 Crank housing approx. 110g of Makita grease R No.00 in the crank room
appropriate amount of Makita grease N No.1 to the teeth portion
43 Spur gear 47 appropriate amount of Makita grease N No.1 to the teeth portion
appropriate amount of Makita grease R No.00 to the whole portion
Piston
53 O ring 55
appropriate amount of Makita grease R No.00 to the whole portion
56, 58 O ring 52
appropriate amount of Makita grease R No.00 to the whole portion
100 O ring 60
approx. 10g of Makita grease R No.00 to the inside
57 Cylinder liner 62
appropriate amount of Makita grease R No.00 to the inside surface of the two holes
52 Connecting rod
Cylinder B appropriate amount of Makita grease R No.00 to the inside surface
98 X ring 40 appropriate amount of Makita grease R No.00 to the whole portion
Fig. 2
Item No. Description Portion to lubricate
22
: Makita grease N No.1
: Makita grease R No.00 31
24
35 43
56
53
57
58
98
85
100
52

P 4 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Disassembling/Assembling Motor Section
Fig. 3 Fig. 4
1) Remove Motor housing cover set. Fan 100 secured with Hex nut M8 will be now visible.
2) Remove the assembly of Rear cover and Handle (switch side), then Brush holder caps and Carbon brushes.
3) Remove hex nut M8 by turning counterclockwise with Socket bit 13-55 (No.784408-3) and Impact driver.
Now Fan 100 can be separated from Armature shaft. (Fig. 3)
4) After unscrewing four M6x22 Hex socket had bolts, remove Bearing box from Crank housing using
Gear extractor, large (No.1R045). (Fig. 4)
Important:
When unscrewing Brush holder caps, be careful not to break the screwdriver insertion slot because the adhesive-applied
Brush holder caps are secured tight.
Socket Bit 13-55
(No.784408-3)
Fan 100
Bearing box
Bearing box
Hex socket head bolt
M6x22 (4pcs)
Gear extractor, large
(No.1R045)
Crank housing
Fig. 5
5) Pull off Motor housing B from Crank housing. Then remove Motor housing A from Crank housing by tapping the
edge of Crank housing with plastic hammer. (Fig. 5) Sometimes, when tapping Crank housing, Armature may be
removed from Crank housing before Motor housing A.
6) After unscrewing two M5x85 Hex bolts, remove Field by tapping the edge of Motor housing A with plastic hammer.
(Fig. 6)
Crank housing
Motor housing A
Motor housing B
Hex bolt M5x85Field
Motor housing A
Fig. 6
Armature
REMOVING FIELD

P 5 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Disassembling/Assembling Motor Section (cont.)
INSTALLING FIELD
Fig. 7
Motor housing A
Field
Motor housing B side
Field lead wires
Field lead wires
Fig. 9
[Correct] [Wrong]
Motor housing B side
Lead wire side
Lead wire side
Do the reverse of the disassembling steps.
Important:
Field is not reversible when assembled into Motor housing A. Be sure to assemble so that the Lead wire side of the Field
is placed on the Motor housing B side as illustrated to left in Fig. 7.
It will be impossible to route the lead wires to Motor housing B if assembled as illustrated to right in Fig. 7.
REMOVING ARMATURE
If Armature is not removed in removal of Field as described in 5)
of "Removing Field", remove by following the steps described below:
1) Remove the parts of Fan 100 side (Fan 100, Bearing box and
Motor housing B). (See Figs. 3, 4, 5)
Note: It is not necessary to remove Motor housing A and Field.
Remove four M8x75 Hex socket head bolts with 1R231.
2) Remove Gear housing cover by raising with Slotted screwdriver and
Bearing extractor (No.1R263) as in Fig. 8.
Note: The two tools are necessary because Gear housing cover is
securely fastened to Gear housing using adhesive.
3) After removing the assembly of Helical gear 50 and Spur gear 22,
insert the arms of 1R045 through the opening of Gear housing.
Then grip the bearing chamber of Gear housing with the jaws of 1R045.
Now, by turning the handle of 1R045 clockwise, Armature can be
removed form Gear housing. (Fig. 9)
Assembly of
Helical gear 50
and Spur gear 22
Fig. 8
Gear housing cover
Gear housing
Armature shaft
Bearing chamber
of Gear housing
No.1R045
Armature

P 6 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
Fig. 10
1) After separating Gear housing from Crank housing, remove Ball bearing 6302LLB with Gear extractor, large
(No.1R045). At this time, be careful not to lose Pin 5. Then using Retaining ring S and R pliers (No.1R291)
remove Retaining ring S-20. (Fig. 10)
2) Put Gear housing on Pipe Ring (No.1R023), and press down Crank shaft using arbor press. (Fig. 11)
3) Now Crank shaft complete, Spur gear 47 and Sleeve 25 can be removed from Gear housing. (Fig. 12)
Note: Be careful not to lose two woodruff keys.
4) Two 6202 Ball bearings can be removed from the assembly
of Helical gear 50 and Spur gear 22 using Bearing extractors
(No.1R263) as illustrated in Fig. 13.
5) As illustrated in Fig. 15, the assembly of Helical gear 50 and
Spur gear 22 can be disassembled using Pipe ring (No.1R023),
Round Bar for Arbor 14-100 (No.1R243), arbor press and
two appropriate steel plates.
Note: Be careful not to lose two Woodruff keys.
[3] -2. Disassembling/Assembling Gear Section
Ball bearing
6302LLB
Retaining
ring S-20
Gear housing
Fig. 11 Fig. 12
Crank shaft
complete
Crank shaft complete
Arbor press
Pipe Ring
(No.1R023)
Spur gear 47
Sleeve 25
Woodruff key 4
Fig. 13
Helical gear 50 Spur gear 22
Bearing Extractor
(No.1R263)
Ball bearing 6202
(on Helical gear 50 side)
Ball bearing 6202
(on Spur gear 22 side)
Fig. 14
Pipe Ring (No.1R023)
Round bar
for arbor 14-100
(No.1R243 )
Arbor press
Woodruff key 4
Spur gear 22
Metal plates
for supporting Gear
Helical gear 50
DISASSEMBLING

P 7 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Disassembling/Assembling Gear Section (cont.)
ASSEMBLING
1) After setting O ring 40, O ring 90 and Pin 4 in place on Gear housing complete, press-fit Crank shaft complete and
Armature onto Gear housing using arbor press as illustrated in Fig. 15.
2) Put Sleeve 25 through Crank shaft complete. Set woodruff keys onto the concaves of Crank shaft complete.
Mount Spur gear 47 to Crank shaft complete. After fixing Spur gear 47 with Retaining ring S-20, assemble Ball
bearing 6302LLB to Crank shaft complete. (Fig. 16)
3) Assemble Helical gear 50 to Spur gear 22. Mount the assembly to Gear housing complete.
4) Put Gear housing complete onto Crank housing complete as illustrated in Fig. 18.
5) Apply an appropriate amount of ThreeBond 1215 to the figure 8 inlaid portion that contacts Gear housing cover.
Then secure Gear housing cover to Gear housing complete with four M8x75 Hex socket head bolts. (Fig. 19)
Hex socket head bolt M8x75
Gear housing cover
Fig. 18Fig. 17
Assembly of Helical gear 50
and Spur gear 22
Crank housing comp.
O ring 40
Clean this bearing chamber
of Gear housing complete
before mounting O ring 40
and Armature to protect
O ring 40.
Apply Makita grease N No.1 to the gear portion
of Armature before press-fitting Armature onto
Gear housing.
Fig. 15
O ring 90
Crank shaft complete
Fig. 16
Crank shaft complete
Spur gear 47
Sleeve 25
Gear housing complete
Woodruff key 4
(2 pcs)
Ball bearing 6302LLB
Retaining ring S-20
Pin 5
Pin 4
Fit Pin 4 on Gear housing
complete in the hole of
Crank housing complete.
Before putting Gear housing
cover, apply ThreeBond 1215
to the figure 8 inlaid portion
designated with white arrow.

P 8 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Disassembling/Assembling Barrel Section
DISASSEMBLING
ASSEMBLING
1) Remove Barrel from Crank housing complete by unscrewing four M12x55 Hex socket head bolts.
Then remove Cylinder liner 62. (Fig. 19)
Note: Use an appropriate steel pipe to extend the grip of hex wrench for easy removal of the bolts securely fastened
with adhesive.
2) Take out Striker from Cylinder liner 62, then remove O ring 52 from Striker. (Fig. 19)
3) Take out Piston and Connecting rod from Crank housing complete, and remove O ring 52 and O ring 55 from the
removed Piston. (Fig. 19)
Do the reverse of the disassembling steps.
Note:
Striker and Spacer are not reversible when assembled to Cylinder liner 62. Be sure to install as illustrated in Fig. 20.
Fig. 19
Fig. 20
Piston
Barrel Flat washer 63
Spacer
Crank housing comp.
Cylinder liner 62
Striker O ring 52
Steel pipe
[Tool retainer side]
[Crank housing side]
Cylinder liner 62
Spacer
Striker
Pin 5
Crank housing completeGasketBarrel
Fig. 21
CORRECT
WRONG
[Cross section]
Do not forget to put Flat washer 63 between Cylinder
liner 62 and Crank housing complete.
When assembling Barrel to Crank housing complete,
first fit Pin 5 in the hole on Barrel, and put the pin
through the hole of Gasket.
Then fit Barrel to Crank housing complete so that
Pin 5 is inserted into the hole on Crank housing
complete. (Fig. 21)
Piston and Connecting Rod
O ring 52 O ring 55

P 9 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
DISASSEMBLING
[3] -4. Disassembling/Assembling Tool Retainer Section
1) Tool retainer can be removed as illustrated in Fig. 22.
2) For removing Tool retainer poles, first set Gear extractor, large (No.1R045) as illustrated in Fig. 23.
*Attach Center attachment (No.1R346) to No.1R045.
*Adjust the pitch of the arms of No.1R045 to minimum for securely holding Retainer ring.
*Set Tool retainer pole removing tool (No.1R347) between No.1R346 and Tool retainer pole.
3) Then pull Retainer ring in the direction of Tool retainer pole by turning the handle of 1R045 clockwise, and remove
Pin 4 from the rod hole of Tool retainer pole by hand. (Fig. 23)
Be sure to securely hold the arms of No.1R045 not to spread out, or the arms will fall off from retainer ring and
Compression spring and Retainer ring will fly away.
4) Slowly loosen the handle of No.1R045 by turning counterclockwise until Retainer ring is released from Compression
spring 12. Now Tool retainer pole can be removed from Tool holder 29. (Fig. 24)
Retainer ring
Tool retainer pole
Compression
spring 12
Fig. 24
No.1R347
Pin 4
Retainer ring Tool retainer pole
Compression spring 12
No.1R346
No.1R045
Adjust the pitch between
the arms to minimum.
Fig. 23
Tool holder 29
Tool retainerTool holder 29
Swivel Tool retainer to the
position illustrated above.
Spring pin 8-40
Remove spring pin 8-40
with Spring pin extractor
(No.1R348).
Tap out Tool retainer shaft
using slotted screwdriver.
Now Tool retainer can be
removed from Tool holder.
Tool retainer shaft
Slotted
screwdriver
Fig. 22

P 10 / 18
Repair
[3] DISASSEMBLY/ASSEMBLY
ASSEMBLING
[3] -4. Disassembling/Assembling Tool Retainer Section (cont.)
Fig. 25
Fig. 26
Fig. 27 Fig. 28
Tool retainer shaft
Bit insertion hole
Concave portion
Tool retainer shaft
Tool holder 29
Barrel
Tool holder 29 Tool retainer pole
Compression spring 12
Do the reverse of the disassembling steps.
Note:
When assembling Tool retainer to Tool holder 29, follow the instructions described below. (Fig. 25 - 28)
B) Insert Tool retainer shaft from the end chamfered more than the other. (Fig. 27)
C) Tool retainer shaft is not reversible when inserted into Tool retainer. As illustrated in Fig. 28, be sure to insert so that
the concave portion on Tool retainer shaft is positioned on the bit insertion hole of Tool holder 29.
Slotted screwdriver
Insert tool retainer shaft by tapping with plastic hammer
till the Pin 4 insertion hole of Tool retainer shaft is aligned
with that of Tool retainer.
A) See Fig. 26. As illustrated to left, when assembled to Tool holder 29, Tool retainer pole is pulled in the direction of
Barrel by the force of Compression spring 12, and the hole of Tool retainer pole is not aligned with the hole of Tool
holder 29.
Therefore, as illustrated to right, while aligning the two holes by sliding Tool retainer pole with slotted screwdriver,
assemble Tool retainer and Tool retainer shaft to Tool holder 29.
Slotted screwdriver
A
B
C
Tool retainer
Pin 4 insertion hole
Tool holder 29
End chamfered more
Tool retainer shaft
Tool retainer