Makita HR4501C Manual

Model No.
Description
NEW TOOL
CONCEPT AND MAIN APPLICATIONS
P 1/ 23
Specification
Standard equipment
Optional accessories
Side handle (D-shaped) .............. 1
Side handle (Bar-shaped) ........... 1
Depth gauge ............................... 1
TCT bits, Core bits, Bull points, Cold chisels, Scaling chisels,
Scaling chisel (for Tile), Grooving chisel, Clay spade, Bushing tool, Rammer,
Shank (for Bushing tool and Rammer), Chemical anchor adapter, Bit grease
Hammer grease, Side handle (D-shaped), Plastic carrying case, Blow-out bulb,
Safety goggle, Hammer service kit
Bit grease ................................. 1
Plastic carrying case ................ 1
Cleaning cloth .......................... 1
Dimensions: mm (")
Width (W)
Height (H)
Length (L)
Model No. HR4501C HR4510C HR4511C
458 (18)
136 (5-3/8)121 (4-3/4)
288 (11-3/8)
Note: The standard equipment for the tool shown above may differ by country.
HR4501C, HR4510C, HR4511C
Rotary Hammers 45mm (1-3/4")
HR4501C series models have been developed as successor models
of HR4500C, featuring low vibration level and high work efficiency.
Listed below are their main features.
Active dynamic vibration absorber
Model No.
Vibration absorbing handle
Selectable two on-off switches
HR4501C
Yes Yes
Yes
YesYes
No
No
HR4510C HR4511C
No
No
HR4501C
L
H
W
HR4511C
HR4510C
No load speed: min-1=rpm
Impacts per min: min-1=ipm
Model No. HR4501C HR4510C
8.4 (18.5) 8.5 (18.7)7.8 (17.2)
Europe: 4.0 (13.1), Other countries: 5.0 (16.4)
HR4511C
Shank type
Capacities: mm (")
Torque limiter
Double insulation
Net weight: kg (lbs)
Power supply cord: m (ft)
Electronic
features
Variable speed control by dial
Constant speed control
Soft start
Yes
Yes
Yes
Yes
Yes
45 (1-3/4)
125 (5)
130 - 280
1,250 - 2,750
Max Core bit diameter
Max TCT bit diameter
SDS-Max
TECHNICAL INFORMATION
120
110
220
230
240
14 1,350
---
600 1,60050/60
7 1,350 600 1,70050/60
7 1,350 600 1,70050/60
7 1,350 600 1,70050/60
13.5 600 1,60050/60
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output (W)
Current (A)

P 2/23
[2] LUBRICATION
[1] NECESSARY REPAIRING TOOLS
CAUTION: Unplug the tool and remove the bit for safety before repair/ maintenance
in accordance with the instruction manual!
Fig. 1
Barrel and Tool holder section
Repair
DescriptionCode No. Use for
Item No. Description Grease AmountPortion to lubricate
1R003 Retaining ring S Pliers ST-2N
1R040 Armature holder 50 set for Vise
1R045 Gear extractor (large)
Tip for Retaining ring pliers1R212
1R213 Cylinder extractor
1R214 Taper sleeve
1R228 1/4” Hex. shank bit for M4
1R230 1/4” Hex. shank bit for M6
1R269 Bearing extractor
1R291 Retaining ring S and R Pliers
1R346 Center attachment
1R350 Ring 60
Removing / Mounting Ring spring
Supporting 1R213 when removing Cylinder
Removing Armature from Gear housing complete
Attachment for 1R003
Disassembling Cylinder from Crank housing
Fitting Fluoride ring 28 to Impact bolt
Screwing / Unscrewing M4x25 Hex socket head bolt of Barrel cover
Screwing / Unscrewing M6x30 Hex socket head bolt of Barrel
Removing Ball bearings
Removing / Mounting Retaining rings
Attachment for 1R045
Supporting 1R213 when removing Cylinder
23
25
9
9
22
18
16
(16b)
1
(16c)
(16a)
20
21
1
16
18
20
22
25
23
Tool holder cap
9 Tool retainer
(16a) Oil seal 35
(16b) Plane bearing 36
Barrel
complete
(16c) Plane bearing 48
Flat washer 36
Flat washer 36
Bit installation side
Crank housing side
21 Tool holder 15g
a little
a little
Inner surface where 25 Impact bolt contacts
X ring 21
Impact bolt
Fluoride ring 28
Lip portion
Portion where Bit contacts
Inner surface where 21 Tool holder contacts
Portion where 21 Tool holder contacts
Drum portion
N No.2
R No.00
Apply the following lubricants to protect parts and product from unusual abrasion:
*Makita grease N No. 2 (Part No. 181573-3: Grease vessel 93g) with white triangle
*Makita grease R. No.00 (Part No. 181490-7: Hammer grease 30g) with black triangle

P 3/ 23
[2] LUBRICATION (cont.)
Repair
Item No. Description Portion to lubricate Amount
Apply Makita grease R. No.00 and N.No.2 to the following portions designated with the black triangle to protect
parts and product from unusual abrasion.
82 Crank housing complete
40 Cylinder 34
37
48
39
49 O Ring 27 on Piston
Straight bevel gear 35
Connecting rod
O Ring 27 on Striker
99 Gear housing complete
Oil seal 15
Inside between Striker and Piston
Whole portion
Gear teeth
Hole for Crank shaft pin
Whole portion
Gear teeth of Torque limiter, Spur gear 19,
Helical gear 36 and Armature
Crank room
Lip portion
Inner periphery of Plane bearing 59
(The component of Crank housing completete)
Fig. 2
Grease
R No.00
82
Crank shaft
40
37
49
48
39
99
146 Armature
Torque limiter
assembly
82a 82b
82b
82a
146
Striker
Piston
Crank housing and Motor section
25g
25g
a little
a little
5g
a little
Fig. 3
Item No. Description Portion to lubricate Amount
O Ring 8
O Ring 12
O Ring 22
Drum portion where Pipe 20 contacts
Whole portion
AVT mechanism (for HR4510C and HR4511C only)
Pipe 20
Spring guide
Counter weight
Compression spring 14
Pipe holder
58
58
55
52
50
61
63
57
57
Grease
R No.00 a little
55
61
52
63
50

P 4/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Chuck Section
Repair
DISASSEMBLY
4x14 Tapping
Screw (2 pcs.)
Handle section
1) Disassemble Handle section. (Fig. 4) Hold the machine upright and disassemble Chuck section in the order of Figs. 5
to 11.
Connector
Controller
Motor
housing
Tool holder cap
Holding the machine upright with
1R350 as illustrated below, remove
Tool holder cap.
1R350
1. Separate Handle section from Motor housing
by unscrewing 5x25 Tapping screws.
2. Pull off Connector from Controller.
3. After removing 4x14 tapping screws, disassemble
Controller from Motor housing.
Ring spring 25
While pulling down Chuck cover, remove Ring spring 25
from the Tool holder using 1R003 with 1R212.
1R003 with 1R212
Chuck cover
1R003
Fig. 4 Fig. 5
Fig. 6 Fig. 7
Tool holder
Tool holder
Ring 28
Ring 28
After removing Ring spring 25, disassemble
the following parts in order from Tool holder.
1. Ring 28
2. Chuck cover
3. Spacer
Ring spring 25
Chuck cover
Spacer
Chuck ring
5x25 Tapping
screw (6 pcs.)

P 5/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Chuck Section (cont.)
Repair
DISASSEMBLY
ASSEMBLY
Fig. 8
Fig. 10
Fig. 9
Fig. 11
Tool holder
Do the reverse of the disassembling steps. Refer to Figs. 11 to 4.
Note: If it is difficult to mount Tool holder cap by hand, press the
machine onto Tool holder cap after assembling Handle section.
(Fig. 12)
Reserve the space for Tool retainer removing
by pressing down Spring guide. And take off
Tool retainers (2pcs.) from Tool holder.
Disassemble Spring guide and Compression
spring 49 from Tool holder.
Ring spring 25
Remove another Ring spring 25 from
Tool holder.
Remove Chuck ring and Release cover.
Chuck ring
Tool holder
Tool retainer
Release cover
Release cover
Chuck ring
Tool holder Tool holder
Tool
retainer
Tool retainer Spring guide
Spring guide
Tool holder cap
Compression
spring 49
Fig. 12
Spring guide

P 6/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Tool Holder Section
Repair
DISASSEMBLY
1) Disassemble Chuck section. (Figs. 4 - 11)
2) Disassemble the Tool holder section in the order of Figs. 13 -17.
M4x25 Hex socket head bolt
Unscrew M4x25 Hex socket head bolt
and remove Barrel cover complete.
Remove Impact bolt from
Tool holder.
Disassemble Barrel complete
together with Tool holder by
unscrewing M6x30 Hex
socket head bolts (4 pcs.).
Separate Tool holder from Barrel
complete. Then remove Flat washer
36 (2pcs.) and Urethane ring 36
from Tool holder.
M6x30 Hex socket
head bolt (4 pcs.)
Barrel cover complete
Barrel complete Barrel complete
Barrel complete Flat washer 36
Flat washer 36
Urethane
ring 36
Tool holder
Tool holder
Tool holder
X ring 21
All the Rings on Impact bolt have to
be replaced if O ring 23 (orange)
can be seen through the worn Fluoride
ring 28.
O ring 23
Fluoride ring 28
(the worn one)
Fig. 13 Fig. 14 Fig. 15
Fig. 16 Fig. 17
Ring 19
Rubber ring 20
Remove the following parts from
Crank housing.
These parts may come out with Barrel
complete in the step of Fig. 14.
In this Case, they are disassembled
from Tool holder in the step of Fig. 16.
Ring 38
Shoulder sleeve 19
Slide sleeve
Impact bolt
Impact bolt

P 7/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Tool Holder Section (cont.)
Repair
DISASSEMBLY
ASSEMBLY
Ring 38
O ring 53 and Lock sleeve are
removed from Driving sleeve.
Driving sleeve section
Striker Cylinder 34
Straight bevel gear 35
Compression
spring 39
Link arm
O ring 27
Replace the old O ring 27
in this step.
O ring 53
Lock sleeve
Lock sleeve
Driving sleeve
Fig. 18
3) Parts assembled to Cylinder 34 are removed. (Fig. 18)
1) Pay attention to the descriptions in Figs. 19 and 20.
2) Insert Striker into Cylinder 34. And to Crank housing, assemble Straight bevel gear 35, the Driving sleeve section
with Link arm, Compression spring 39 and Ring 38. Refer to Fig. 18.
Fig. 19
Fig. 20
O ring 27
Bulge portion
Crank housing sideImpact bolt side
Rib on Link arm
Mount Lock sleeve
on Driving sleeve.
Fit O ring 53 into the
grooves on Driving
sleeve.
Fit the rib of Link arm into the groove
on Driving sleeve.
Facing O ring 27 installation side of Striker to Crank housing, insert Striker into Cylinder 34.
Groove on Driving sleeve
Straight bevel gear 35
(assembled in Crank
housing complete)
Grooves for O ring 53
O ring 53
Driving sleeve
Fix Driving sleeve to Crank housing
while engaging with Straight bevel gear 35.
Driving sleeve

P 8/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Tool Holder Section (cont.)
Repair
ASSEMBLY
1R214
Correction
Insert Impact bolt from
the HR5001C side of
1R214 and keep it aprox.
60 seconds.
Impact bolt
Assembly of Rings to Impact Bolt
Assembly of Impact Bolt Section
Fig. 21
Fig. 22 Fig. 23
Before correction:
Rings' edges are protruding from
the top edge of the groove on
Impact bolt.
Groove on Impact bolt
Impact bolt Ring 19 Slide sleeve Flat washer 36
O ring 71
Barrel complete
Do not forget to mount O Ring 71
to Barrel complete.
Flat washers 36 (2 pcs.)
have to be assembled
to the both side of
Urethane washer 36.
Urethane washer 36
Rubber
ring 20
Shoulder
sleeve 19
Face the chamfered
edge to Impact bolt.
Face the conical side
to Slide sleeve.
Face the chamfered Side
to Shoulder sleeve 19.
Insert the assembled Impact
bolt section into Tool holder.
Fluoride ring 28
X ring 21 O ring 23
After correction:
Rings' edges are positioned
under the top edge of the
groove on Impact bolt.
Corrected
3) After installing Fluoride ring 28 on the groove of Impact bolt, the Ring is stretched and its edges are protruding from
the groove. Correct the deformation as illustrated in Fig. 21.
4) Assemble Impact bolt section, and insert it into Tool holder. (Fig. 22)
5) Assemble Tool holder and Rings to Barrel complete. (Fig. 23)
6) Take the reverse step of Disassembly to do the further steps.
Tool holder

P 9/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Barrel Complete
Repair
DISASSEMBLY
ASSEMBLY
1) Remove Barrel complete from the machine as illustrated in Figs. 13, 14 and 15.
2) Remove Ring spring 50 and Oil seal 35 as illustrated in Figs. 24 and 25.
Ring spring 50
Oil seal 35
Oil seal 35
Lip portion
Barrel complete
Note: Facing the lip portion of Oil seal 35 to Tool holder cap side,
fit Oil seal into Barrel complete.
1) Fit Oil seal 35 into Barrel complete. Refer to Fig. 26.
2) Secure Oil seal with Ring spring 50. Refer to Fig. 24.
With thin slotted screwdriver,
remove Ring spring 50 for securing
Oil seal 35 in Barrel complete.
Oil seal 35
Push out Oil seal 35 by striking with slotted
screwdriver.
Fig . 24 Fig. 25
Fig. 26
Tool holder
cap Side

P 10/ 23
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Active Dynamic Vibration Absorber (HR4510C and HR4511C only)
Repair
DISASSEMBLY
1) Disassemble Chuck section. (Figs. 4 to 11) and remove Barrel cover complete and Barrel section. (Figs. 13 and 14)
2) Disassemble Active dynamic vibration absorber in the order of Figs. 27 to 30.
Fig. 27
Fig. 28 Fig. 29
Compression
spring 11
Spring guide
Absorber holder of
Crank housing complete
phillips
screwdriver
slotted screwdriver
Pipe holder
Push Spring guide
(inner part of the
Absorber).
Absorber holder
Spring guide will tilt to be
locked inside Absorber, and
this end of the Absorber is
released from Crank housing
complete
Disassemble Active dynamic vibration absorber as follows.
Disassemble Active dynamic
vibration absorber, by levering up
with two slotted screwdriver.
Active Dynamic
Vibration Absorber
Remove Crank housing
cover. Then set Change
lever to Rotation with
hammering mode.
Remove the Change
lever by unscrewing
4x14 Tapping screw.
Remove Crank cap cover
by unscrewing 4x14 Tapping
screw.
Then remove Control plate.
Remove Crank cap together
with Crank lever by unscrewing
M4x18 Pan head screw.
Crank housing cover
Change lever
Change lever
Crank cap cover
Control
plate
4x14 Tapping screw
4x14 Tapping screw (2 pcs.) M4x18 Pan head
screw (6 pcs.)
Crank cap
Crank lever
Pipe holder Pipe holder
O ring 8 O ring 12 O ring 8
O ring 12
O ring 22 O ring 22
Compression spring 11 Compression spring 11
Spring guide
Pipe 20
Counter weight Spring guide
Fig. 30
Pipe holders can be
separated by turning Pipe
holders while pushing
strong toward each other.