Makita HP1230 User manual

Models No.
Description
PRODUCT
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
P 1/ 8
HP1230
Hammer Drill 12 mm (15/32")
Model HP1230 has been developed as a compact and lightweight
12mm (15/32") hammer drill with new exterior design.
This product is also available with plastic carrying case
as Model HP1230K.
Specification
Standard equipment
Optional accessories
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output (W)
110
120
220
230
240
3.8
3.5
1.9
1.9
1.8
50/60
50/60
50/60
50/60
50/60
400
---
400
400
400
230
230
230
230
230
300
300
300
300
300
Current (A)
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 239 (9-3/8)
67 (2-5/8)
188 (7-3/8)
Note: The standard equipment for the tool shown above may differ by country.
Chuck key S-10 ........................ 1
Depth gauge .............................. 1
Side grip .................................... 1
Plastic carrying case ................. 1 (HP1230K only)
Various TCT drill bits 3.0 -12mm (1/8 -15/32")
Various HSS metal drill bits 1.5 -6mm (1/16 -1/4")
Phillips bit
Slotted bit
(+) (-) Driver bit
Wool bonnet 100
Rubber pad ass'y
Foam polishing pad 125
Drill stand Type 43
W
L
H
Chuck capacity: mm (")
Drill chuck type
Reversing switch
No load speed: min -1= rpm
Impacts per min.: min -1= ipm
Capacities: mm (") Steel
Concrete
Wood
Protection against electric shock
Power supply cord: m (ft)
Net weight: kg (lbs)
0 - 2,900
0 - 31,900
Keyed chuck
1.5 - 10
(1/16 - 3/8)
12 (15/32)
10 (3/8)
15 (9/16)
Yes
Double insulation
1.4 (3.1)
2.0 (6.6)

P 2 / 8
[2] LUBRICATION
Apply Makita grease N. No.1 to the following portions designated with the black triangle to protect parts and product
from unusual abrasion.
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the bit from the machine for safety before repair/ maintenance
in accordance with the instruction manual!
Fig. 1
Repair
DescriptionCode No. Use for
Mounting Helical gear 37
Removing Spindle
Removing Retaining ring R-32
Removing Armature from Cam housing
Removing / Mounting Drill chuck
Removing Spindle
Item No.
4
6
Description
Spindle
Gear housing
Portion to lubricate
1R027
1R029
1R037
1R045
1R346
1R139
1R223
1R224
1R228
134873-0
1R246
1R252
1R284
Bearing setting pipe 18-10.2
1R005 Retaining ring pliers RT-2N
Bearing setting pipe 23-15.2
Bearing setting plate 20.2
Gear extractor (large)
Center attachment for 1R045
Drill chuck extractor
Torque wrench shaft 20-90N.m
Ratchet head 12.7
1/4” Hex. shank bit for M4
Round bar for arbor 18-100
Bit adapter ass'y
Round bar for arbor 30-100 Mounting Ball bearing 6002LLB
Removing Ball bearing 6002LLB
Round bar for arbor 10-50
12
12
Pin 4
4
Ball bearing
6002DDW Steel ball 3.5
Cam housing
6
(a)
(a) Drum portion where Ball bearing 6002DDW contacts
(b) Hole in which Steel ball 3.5 and Pin 4 are inserted.
Gear room for 12 Helical gear 37 Apply approx. 4gMakita grease N. No.1.
(b)
Helical gear 37 Cam and teeth portions

P 3 / 8
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Drill Chuck, Spindle, Helical Gear 37, Ball Bearing 6002DDW
Repair
DISASSEMBLY
1R228
1R224
1R223
1R139
Bit adapter
Sleeve of Drill chuckflat portion of Spindle
1) Hold 1R139 with vise. Fit the flat portion of Spindle to 1R139. (Fig. 2)
2) Hold 1R228 with Drill chuck. Turn Drill chuck counterclockwise with 1R228, 134873-0, 1R224 and 1R223.
(Fig. 3)
Note: Use a pipe wrench to remove Drill chuck, if the sleeve of Drill chuck does not turn because of some troubles
with Drill chuck. Grip the periphery of the sleeve with wrench, and turn the wrench counterclockwise.
3) Remove Gear housing from Motor housing by unscrewing three 4x25 Tapping screws. And remove Retaining ring
WR-12 from Spindle. (Fig. 4)
Note: Steel ball 3.5 and Pin 4 may be fallen off from Spindle. Be careful not to lose them.
4) Put Gear housing over 1R037 and Apply 1R284 on Spindle's end. And remove Spindle with Arbor press.
Conical compression spring 15-24 pops out together with Spindle. Helical gear 37 can be removed. (Fig. 5)
1R139
Vise
Fig. 2 Fig. 3
Fig. 4 Fig. 5
4x25 Tapping
screw: 3 pcs.
Gear housing
Gear housing
Cam housing
Retaining ring WR12
Motor housing
Steel ball 3.5
Pin 4
Spindle 1R284
Gear
housing
Helical
gear 37
Helical
gear 37
Spindle
1R037
Spindle
Conical compression
spring 15-24

P 4 / 8
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Drill Chuck, Spindle, Helical Gear 37, Ball Bearing 6002DDW (Cont.)
Repair
DISASSEMBLY
1) Turn and remove Conical compression spring 15-24 when it remains at the hole of Gear housing. (Fig. 6)
2) Remove Retaining ring R-32 with 1R005. (Fig. 7)
3) Applying 1R246 as illustrated in Fig. 8, press down Ball bearing 6002DDW and Cup washer 15.
1) Assemble Cup washer to Gear housing. (Fig. 9)
Note: Face the concave of Cup washer to Drill chuck assembling side.
2) Applying 1R252 as illustrated in Fig. 10, press-fit Ball bearing 6002DDW. Secure it with Retaining ring R-32 (Fig. 7)
3) Turn and push Conical compression spring 15-24 into Gear housing. (Fig. 11)
Fig. 6
Fig. 10
Fig. 7 Fig. 8
Fig. 9
WrongCorrect
Conical compression spring 15-24
can be stabilized in the concave
of Cup washer.
Fig. 11
Conical compression
spring 15-24
hole of
Gear housing
hole of
Gear housing
The reverse side
of Gear housing
Retaining
ring R-32
1R005
1R246
Arbor press
Cup washer 15
Ball bearing
6002DDW
Ball bearing
6002DDW
Arbor press
Arbor press
ASSEMBLY
Drill chuck assembling side
1R252
Conical
compression
spring 15-24
There is no concave
for Conical compression
spring 15-24.
1R027
Helical gear 37
4) Insert Spindle into Ball bearing 6002DDW in Gear housing by hand. (Fig. 12)
5) Applying 1R027 to Spindle as illustrated in Fig. 13, press-fit Helical gear 37 using 1R029.
Note: Do not pinch Conical compression spring between the rim of Spindle (Re: Fig. 12) and Gear housing.
6) Fit Retaining ring WR12 into the groove of Spindle to hold Helical gear 37. Install Pin 4 and Steel ball 3.5. (Fig. 14)
Fig. 13 Fig. 14
Fig. 12
1R029
Gear housing
rim of Spindle
Gear housing
Helical gear 37
Steel ball 3.5
Retaining
ring WR12
groove of Spindle
Pin 4

P 5 / 8
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Drill Chuck, Spindle, Helical Gear 37, Ball Bearing 6002DDW (Cont.)
Repair
ASSEMBLY
7) Assemble the Gear housing to Motor housing. Refer to Fig. 4.
Note: Make sure that Conical compression spring works
properly as illustrated in Fig. 15.
8) Fasten Drill chuck to the fastening torque of 25.5 - 30.6 N.m by
turning clockwise.
Spindle must return as soon as you push it down.
Fig. 15
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Change Lever
DISASSEMBLY
Change lever A and Lever case can be separated from Cam housing as illustrated in Fig. 17.
Note: Cam housing consists of Cam, Plane bearing and Change plate. (Fig. 16)
Even if any component of Cam housing has damaged, replace Cam housing by new one.
Fig. 17Fig. 16
Cam housing
Viewed from the reverse side
Structure of Cam housing
Cam
Plane
bearing
Cam housing
Change plate
Change plate
Rubber
pin 4
Lever case Fan guard
Fan guard
Change lever A
Lever caseAwl
Change
plate
Rubber pin 4
Fan guard
Lever case
Change lever AChange lever A
ASSEMBLY
Fig. 18
Assemble Change lever A and Lever case to the new Cam housing as illustrated in Fig. 18.
Insert Rubber pin 4 into
the boss of Change lever A.
Push the boss into the hole of
Change plate through Lever case.
Gripping Change lever A and Change plate with Pliers,
press them.
Change lever A is fixed correctly to Change plate of
new Cam housing.
Fan guard
Rubber pin 4
Change lever A Change lever A
Change lever A
Lever case
Change plate
Change plate
boss
boss
Fan guard
Pliers

P 6 / 8
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Armature
Repair
DISASSEMBLY
ASSEMBLY
1) Separate Handle cover from Motor housing by unscrewing three binds 4x20 Tapping screws. And disconnect Carbon
brush from Armature's Commutator. (Fig. 19)
2) Remove Gear housing and Cam housing from Motor housing by unscrewing three 4x25 tapping screws. Armature comes
out together with Cam housing as illustrated in Fig. 20.
3) Remove Armature from Cam housing. (Fig. 21)
Do the reverse of Disassembling steps.
Fig. 20Fig. 19
Fig. 21
Cam housing
Armature
Remove Armature from Cam housing
with 1R045 to which 1R346 is attached.
1R346
1R045 1R269
bind 4x20 Tapping
screw: 3 pcs.
Handle cover
Carbon brush
Carbon brush
4x25 Tapping screw: 3 pcs.
Gear housing
Cam housing
Motor housing
Armature
Ring 8
Ball bearing
608DDW
Note: Ring 8 will always be damaged when Ball bearing 608DDW
is removed.
Be sure to replace damaged Ring 8 with new one when reassembling.

Noise
suppressor
Power supply
cord
Brush
holder A
to Brush
holder A
Choke coil
Brush
holder B
Circuit diagram
P 7 / 8
Poke-in
Terminal FA
of Field
Poke-in
Terminal F' A
of Field
Poke-in
Terminal F' B
of Field
Poke-in
Terminal FB
of Field
3
1
12
3
C1 C2
M1M2
2
Switch
1
M1
Switch
If Choke coil is used instead
of Connecting Lead wire (red),
connect it to Switch as illustrated
below.
Color index of lead wires' sheath
Black
White
Red
Orange
Blue
Circuit without Choke Coil
Circuit with Choke Coil
Fig. D-1
Fig. D-1A
4
2

Switch
Wiring diagram
P 8 / 8
If Choke coil is
used, put it in the
position illustrated.
Noise
suppressor
Choke coil
Lead wire
(orange)
Switch
If Noise suppressor
is used, put it in the
position illustrated.
In case of soldering of Lead wires to the reversing
circuit, inflect the Lead wires at the soldered portion
for smooth assembling of Switch to Housing.
Put the slack of the connecting
lead wire (blue) of Brush holder
in the illustrated position.
Put the slack of the Connecting
lead wire (red) of Brush holder
between Switch and the wall of
grip portion.
soldered
portion
soldered
portion
Fix the Lead wires with
Lead wire holder.
Wiring without Choke Coil
Wiring with Choke Coil
Fix the Lead wires
with Lead wire
holder.
Noise suppressor
Brush
holder A
Brush
holder B
Fig. D-2
Fig. D-2A