Makita UH520D, UH522D, UH422D, BUH481, BUH521 Technical Information
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PRODUCT
CONCEPT AND MAIN APPLICATIONS
P 1/ 13
Specification
Standard equipment
Optional accessories
Note: The standard equipment for the tool shown above may vary by country.
Model No.
Description
UH520D
UH422D/ UH482D/ UH522D
BUH481/ BUH521
BUH483/ BUH523
Cordless Hedge Trimmer 520mm (20-1/2")
Cordless Hedge Trimmers 420mm/ 480mm/ 520mm
(16-1/2"/ 18-7/8"/ 20-1/2")
Cordless Hedge Trimmers 480mm/ 520mm (18-7/8"/ 20-1/2")
Cordless Hedge Trimmers 480mm/ 520mm (18-7/8"/ 20-1/2")
Dimensions: mm (")
Width (W)
Height (H)
*2 with 3.0Ah Li-ion battery *3 with 1.3Ah Li-ion battery
Length (L)
888 (35)/ 938 (37)*1
873 (34-3/8)/ 923 (36-1/4)*3
923 (36-1/4)
829 (32-5/8)/ 879 (34-1/2)/ 929 (36-1/2)
BUH483/ 523
881 (34-3/4)/ 931 (36-3/4)*2
869 (34-1/4)/ 919 (36-1/4)*3
BUH481/ 521
UH520D
UH422D/ 482D/
522D
195 (7-5/8)
193 (7-5/8)
Battery
Charging time (approx.): min.
Weight according to
EPTA-Procedure 01/2003*
5: kg (lbs)
Capacity: Ah
Cell
Voltage: V
14.414.4 18
No load speed: min
ˉ¹=spm*3
420 (16-1/2)/ 480 (18-7/8)/ 520 (20-1/2)
--- / --- / UH520D --- / BUH481/ 521 --- / BUH483/ 523
Blade length: mm (")
--- / --- / 3.0
(--- / --- / 6.7)
--- / 3.0/ 3.0 (--- / 6.5/ 6.7),
--- / 3.1/ 3.2 (--- / 6.9/ 7.1)
3.0/ 3.0/ 3.1
(6.6/ 6.7/ 6.8)
--- / 3.0/ 3.1 (--- / 6.7/ 6.8),
--- / 3.2/ 3.3 (--- / 7.1/ 7.3)
1.3, 3.01.1 1.3, 3.0
Energy capacity: Wh 19, 4416 24, 54
Li-ion
190190 210210
15, 22 with DC18RC60 with DC18WA
18
UH422D/ 482D/ 522D
1.1
20
60 with DC18WA 15, 22 with DC18RC
1,350
Max output (W)
Blade cover ............................................. 1
Battery cover ........................................... 1 (same quantity as that of spare battery)
Battery BL1815 (for BUH483/ 523)
Battery BL1830 (for BUH483/ 523)
Charger DC18WA (for UH422D/ 482D/ 520D/ 522D)
Fast charger DC18RC (for BUH481/ 483/ 521/ 523)
Charger DC18SD (for BUH481/ 483/ 521/ 523)
Charger DC24SC (for BUH481/ 483/ 521/ 523)
Automotive charger DC18SE (for BUH481/ 483/ 521/ 523)
The subject models are 14.4V/18V cordless hedge trimmers.
Their main features are:
• Anti-vibration structure
• User-replaceable blade
These products are compatible with the batteries
and the chargers in the list below.
BUH483/ 523
UH422D/ 482D/ 522D BL1811G
UH520D BL1411G
DC18WA
BUH481/ 521
BL1415
BL1430
DC18RC,
DC18SD,
DC24SC,
DC18SE
Model No.
Compatible
charger
BL1815
BL1830
Compatible
battery
Model
Specification
*3: spm= strokes per minute
*4: Indicates maximum diameter of the branch that can be received
between adjacent two blade teeth. (See the figure on right.)
*5: with battery, shear blade assembly
Shear blade complete set
Blade cover
Chip receiver assembly set
Battery BL1411G (for UH520D)
Battery BL1811G (for UH422D/ 482D/ 522D)
Battery BL1415 (for BUH481/ 521)
Battery BL1430 (for BUH481/ 521)
Max. cutting diameter*
4: mm (") ø15 (9/16)
T
ECHNICAL INFORMATION
L
H
W
Apply the following grease to the portions designated with the black triangle to protect parts and product from unusual
abrasion.
[1] NECESSARY REPAIRING TOOLS
Code No. Description Use for
1R035 Bearing Setting Plate Supporting Spur gear 93, when removing Spindle with Arbor press
[2] LUBRICATION
Fig. 1
Item No. Description
Grease
Makita
grease N
No.2
Amount
Portion to lubricate
27A
24
23
Flat washer 8
Bearing box
Crank plate B
Under cover
DC motor
a
b
27A
27 viewed from
Under cover side
Crank plate A
23 Spindle
The drum portion which is accepted by Bearing box
The drum portion which is accepted by Under cover
24 Spur gear 93 Teeth portion for smooth engaging with DC motor’s gear
27 viewed from
Front grip side
Both side where Crank plate A and Crank plate B contact 27A Spacer of Blade
a
a little
a little
b
3 g
CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
Repair
P 2/ 13
Fig. 2
Fig. 3
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Shear blade complete
DISASSEMBLING
1. Remove Under cover by
unscrewing four M4x10
Pan head screws.
2. Remove Shear blade complete by
unscrewing four M5x14 Pan head screws.
And remove two Nylon sleeves from
Shear blade complete.
Shear blade viewed
from Front grip side
Nylon sleeve
(2 pcs.)
Nylon sleeve (2 pcs.)
Spur gear section
Spur gear section
ASSEMBLING
1. Pass Spindle through Flat washer 8 and then set them
in Bearing box complete so that the depressed side of
Spur gear 93 faces to Bearing box complete.
M5x14 Pan
head screw
(4 pcs.)
M5x14 Pan
head screw (4 pcs.)
M4x10 Pan head
screw (4 pcs.)
Under
cover
Disassemble Shear blade complete as drawn in Fig. 2.
Assemble Shear blade complete to the machine as drawn in Fig. 3.
Flat washer 8
3. If Nylon sleeves are left in
the holes of Spur gear section,
remove them after disassembly
of Super gear section.
Flat washer 8
Mating line of Housing L
and Housing R
2. Turn Spur gear 93 until its holes come on
the mating line of Housing set.
Flat washer 8
Spindle on the projected side
of Super gear 93 to Under cover
(Also refer to Fig. 12)
Spindle on
the depressed
side of Supper
gear 93 (Also
refer to Fig. 12)
Bearing box complete
Dust guard
Nylon sleeve
(2 pcs.)
Pins of Shear blade
complete (2 pcs.)
3. Set two Nylon sleeves to two pins of Shear blade
complete.
4. Set Dust guard to Shear blade complete.
Note: Dust gurad is not directional when assembled
with Shear blade complete.
5. Inserting the Nylon sleeves into the holes of
Spur gear 93, set Shear blade complete in place.
Do not forget to set Flat washer 8 to Spindle.
Repair
P 3/ 13
Fig. 4
Fig. 5
[3] DISASSEMBLY/ASSEMBLY
[3] -2. DC motor
DISASSEMBLING
(1) Disassemble Shear blade complete and Spur gear 93 as drawn in Fig. 2.
(2) Remove Protector and Front grip section as drawn in Fig. 4.
(3) Separate Housing R from Housing L. Then, remove Motor housing section from Housing L. See Fig. 5.
3x16 Tapping screw
(6 pcs.)
M4x65 Pan head screw
(1 pc.)
1. Remove Protector by unscrewing
two 4x18 Tapping screws.
And loosen two M5x25 Pan head
screws on the joints of Front grip.
1. Unscrewing six 3x16 Tapping screws and one M4x65
Pan head screw, separate Housing R from Housing L.
2.Separate Motor housing section
from Housing L.
2. Pulling Front grip toward
the direction designated
with arrow, remove it from
the holes on the both side
of Housing set.
3. Push Front grip along the grooves
on the both side of Housing set.
Front grip section is disassembled
from Housing set.
M5x25 Pan head
screw (2 pcs.)
Housing R
4x18 Tapping
screw (2 pcs.)
Motor housing section
groove
Front grip section Front grip section
Repair
P 4/ 13
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