Makita BUH550 Manual

PRODUCT
CONCEPT AND MAIN APPLICATIONS
P1/ 9
Specification
Standard equipment
Optional accessories
Note: The standard equipment for the tool shown above may vary by country.
Model No.
Description
BUH550/ BUH650
Cordless Hedge Trimmers 550, 650mm (21-5/8, 25-1/2")
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 1,150 (45-1/4)1,070 (42)
BUH650BUH550
220 (8-5/8)
190 (7-1/2)
Battery
Charging time (approx.): min.
Soft start
Weight according to
EPTA-Procedure 01/2003*2: kg (lbs)
Capacity: Ah
Cell
Voltage: V 36V
No load speed: min-1=spm*1
650 (25-1/2)550 (21-5/8)
BUH650BUH550
Blade length: mm (")
Yes
Electric brake Yes
5.2 (11.5)5.1 (11.2)
2.6
Li-ion
320
22 with DC36RA
1,000 - 1,800
Max output (W)
Also see the product variation list above.
Blade cover .................................................. 1
Battery BL3626
Fast charger DC36RA
Battery adaptor BAP36N
Models BUH550 and BUH650 are cordless hedge trimmers powered
by 36V/ 2.6Ah Li-ion battery.
Their main benefits are:
Environment-friendly with zero emission and minimum noise pollution
Almost zero-maintenance cost with rechargeable Li-ion battery
5 position rotating rear handle makes vertical and angled trimming
easier and faster.
Well balanced tool design for reduced stress on the arm and hand
holding loop handle
These products will be available in the following variations:
BUH550RDE
BUH550RDEP
BUH550Z
BUH550RD
BUH550RDP
BUH650RDE
BUH650RDEP
BUH650Z
BUH650RD
BUH650RDP BL3626
No
DC36RA
No
Model No. type quantity Charger
No
No
Battery
cover
No
BAP36N
BAP36N
No
Battery
adapter
1
BL3626 DC36RA1 No 2
No
Battery
All models also include the accessories listed below in "Standard equipment".
Model
Specification
LH
W
*1: spm= strokes per minute
*2: with battery, shear blade assembly
Shear blade assembly set
Blade cover
Arm band complete set
Chip receiver assembly set
[Model BUH550]
TECHNICAL INFORMATION

P2/ 9
Repair
CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
[1] NECESSARY REPAIRING TOOLS
[2] LUBRICATIONS
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Shear Blade Assembly, Gear Complete
Fig. 1
Fig. 2
Code No. Description Use for
1R269 Bearing extractor Removing Ball bearings
Item No.
Apply the following lubricant to the pointed area with the triangles to protect parts and product from unusual abrasion.
Description Lubricant AmountPortion to lubricate
DISASSEMBLING
(1) Disassemble Shear blade assembly. (Figs. 2, 3)
1. Set the machine upside-down and
loosen four M4x20 Pan head screws
while holding Front grip.
And then, remove Under cover and Plate.
2. Insert a slotted screwdriver into the the center slot on Gear complete,
then align the crank of Gear complete with the elliptical hole of
Shear blade assembly.
35
35 Gear housing complete Gear room where 44 Gear complete rotates
44 Gear complete Crank portion for Shear blade assembly
Rivet 2Handle L complete
6
44
6a little
3g
8g
Makita grease
N No.2
Under cover
M4x20 Pan
head screws
(4pcs.)
Front grip Crank of Gear completeCenter slot on Gear complete
Shear blade assembly
Plate
ISOFLEX NB52

P3/ 9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Shear Blade Assembly, Gear Complete (cont.)
DISASSEMBLING
M5x25
Pan head screws (2pcs.)
with Sleeves 5 in the holes
4. Remove Gear complete by tapping
the specific part of Gear housing
complete with plastic hammer as
drawn below.
5. Remove 2 pcs. of Ball bearing
608ZZ from the both sides of
Gear complete.
6. Remove 2 pcs. of
Flat washer 8 from
the both sides of
Gear complete.
3. Loosen two M5x25 Pan head screws and separate Shear blade assembly from the machine.
Note: The screws remain in the holes of Shear blade assembly to hold Sleeves 5 in the blade,
if the same blade is reassembled to the machine.
M5x25 Pan head screws (2pcs.)
with Sleeves 5 in the holes
Shear blade
assembly
Fig. 3
Fig. 4
1R269
Ball bearing 608ZZ
Flat washer 8
(2) Disassemble Gear complete. (Fig.4)
Crank side Reverse side

P4/ 9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Shear Blade Assembly, Gear Complete (cont.)
M5x25 Pan head screws (2pcs.)
Shear blade
assembly
Guide plate
Sleeve 5 (1pc. each) in the holes of
Shear blade assembly
Fig. 5
(1) Assemble Flat washer 8 and Ball bearing 608ZZ to the both sides of Gear complete. And then, mount Gear complete
to the machine. (Fig. 4)
(2) Assemble Shear blade assembly. (Fig. 5)
ASSEMBLING
1. Slide Guide plate on Shear blade assembly
to align the holes for M5x25 Pan head screws
with Sleeves 5.
3. Align Crank section of Gear complete to
the elliptical hole of Shear blade assembly
as drawn below. And then, secure Shear
blade assembly by tightening M5x25 Pan
head screws.
4. Make sure that the two shear blades can reciprocate
in order by turning the crank of Gear complete with
slotted screwdriver as drawn below.
2. Pass M5x25 Pan head screws through Sleeves 5
in the holes of Shear blade assembly.
M5x25
Pan head screws
(2pcs.)
[3]-2. Armature, Switch
Fig. 6
DISASSEMBLING
Holder cap covers Gear housing complete
1. Remove Holder cap covers
with Slotted screwdriver.
And remove Carbon brushes.
2. Separate Gear housing complete by loosening six 4x25 Tapping screws.
Gear housing complete is separated from Housing set.
Armature comes with Gear housing complete.
(1) Disassemble Shear blade assembly. (Figs. 2, 3)
(2) Disassemble Gear complete. (Fig.4)
(3) Remove Carbon brushes. And separate Gear housing complete. (Fig. 6)
4x25 Tapping screws (6pcs.)

P5/ 9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Armature, Switch (cont.)
Fig. 7
DISASSEMBLING
Armature
1. Pull off Armature from
Gear housing complete.
(3) Remove Armature and Ball bearings. (Fig. 7)
Ball bearing
6000ZZ
Ball bearing
607ZZ
1R269
2. Remove Ball bearing 6000ZZ and 607ZZ with 1R269.
1. Remove Switch lever B and
Front grip.
2. Remove Knob by loosening
4x18 Tapping screw.
3. Remove nine 4x18 Tapping screws and Handle R complete.
Main switch and Handle switch can be replaced.
4. Remove eight 4x18 Tapping screws and Housing R complete.
Front handle switch can be replaced.
4x18 Tapping screw
Fig. 8
Knob
Switch lever B
Front grip
Front handle
switch
Handle switch
Main switch
Handle R
complete Housing R
complete
Handle L
complete Housing L
complete
(4) Replace switches. (Fig. 8)
4x18 Tapping
screws (9 pcs.)
4x18 Tapping
screws (8 pcs.)
Note: Lock lever is removed
together with Handle switch.

P6/ 9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Armature, Switch (cont.)
Mount Compression spring 6
to Lock lever.
Fig. 9
Fig. 10
ASSEMBLING
(1) Mount the Switches to Handle L complete and Housing L complete by taking the reverse step of Disassembling.
(Fig. 8)
(2) Armature can be assembled by taking the reverse step of Disassembling. (Figs. 7, 6)
(3) Assemble Gear complete. (Fig. 4) And then, mount Shear blade assembly. (Figs. 3, 2)
Notch of Yoke unit
Housing L complete
Protrusion of Housing L complete
Fit the protrusion of Housing L complete
into the groove of Yoke unit.
Assemble Yoke unit to Housing L complete. (Fig. 10)
[3]-3. Lock Lever
[3]-4. Yoke Unit
ASSEMBLING
ASSEMBLING
Compression spring 6
Pin of
Lock lever
Rib of Handle L
complete
Inserting the pin of Lock lever into the elliptical hole of Slider,
assemble Lock lever so that the rib of Handle L complete comes to
the place between Compression spring 6 and Lock lever as drawn in right.
Elliptical hole of Slider
Handle switch
Lock lever
Compression spring 6
Reassemble Lock lever. (Fig. 9)

Circuit diagram
P7/ 9
White
Handle switch
Orange
Blue
Yellow
Color index of lead wires' sheath
Black
Dial
Motor Housing
Front handle switch
Controller
Brush holder
Line filter (if used)
Line filter
(if used)
Insulated
connector
Red
Main switch
Terminal
Fig. D-1
Handle section

Wiring diagram
P8/ 9
Fig. D-2 Fig. D-3
Line Filter and Brush
holders’ Lead wires
Lead Wires of Brush Holder
max.
30 mm
Lead wire (black)
of Brush holder
Lead wire (red) of
Brush holder
• Line filter’s position has to be adjusted that it
distances max. 30 mm from the rib for Yoke unit.
• Two lead wires from Brush holder have to be
coiled around Line filter one turn.
Rib for Yoke unit
Fix Lead wires with Lead wire holders
on Yoke unit side.
Yoke unit side
Line filter
(if used)
Line filter (if used)
Lead wire
holders
Brush holder
Fig. D-4
Motor Housing
Front grip switch
Line Filter (if used) Line Filter (if used)
Put Line filter between
Lead wire holder and
Controller.
Controller
Put Insulated connectors
in this place.
Fix Lead wires in these Lead wire holders.
Brush holder Fix Lead wires in
these Lead wire holders.
• Lead wires (black, red) to Insulated
connector have to be passed through
Line filter.
• Slack portion of lead wires have
to be stored in this place.
Lead wire holder

Wiring diagram
P9/ 9
Handle Section before assembling Handle Switch
Before assembling Handle switch, fix Lead wires (blue, orange) to Main switch
with Lead wire holders as drawn below.
Fig. D-5
Fig. D-6
Lead wires (blue, orange)
Main switch
Place for
Handle switch
Handle Section after assembling Handle Switch
Handle switch
Handle set (L)
Handle set (L)
Lead wire holder
Pass Lead wire from Controller
between Ribs.
Terminal
Fix Lead wires of Handle switch
with Lead wire holder
Ribs
Dial