Dolmar HT-52 Manual

TECHNICAL INFORMATION
P 1/ 5
Model No.
Description
CONCEPT AND MAIN APPLICATIONS
Specification
HT-52/ HT-48/ HT-42
These three Hedge trimmers have been developed for
do-it-yourselfers, featuring compact, lightweight
and more improved handling.
Hedge Trimmers 520mm/ 480mm/ 420mm
Standard equipment
Optional accessories
Blade cover .................................... 1
Hook complete ................................ 1 (except UK)
Cord holder complete ..................... 1
Shear blade assembly set
Blade cover
Hook complete
Cord holder complete
Arm band complete set
Chip receiver assembly set
Blade length: mm (")
Protection from electric shock
Net weight*3: kg (lbs)
No load speed: min-1=spm*1
Model No.
Specifications HT-52 HT-48 HT-42
420
(16-1/2)
520
(20-1/2)
480
(18-7/8)
Double insulation
Blade pitch: mm (") 18 (11/16)
1,600
3.0
(6.6)
2.9
(6.4)
2.8
(6.1)
Power supply cord: m (ft)
*1: spm= strokes per minute
*2: UK: 10m (32.8ft)
*3: Weight according to EPTA-Procedure 01/2003
0.3 (0.98)*2
Note: The standard equipment for the tool shown above may vary by country.
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output (W)
220
230
240
1.9
1.8
1.8
50/60
50/60
50/60
400
400
400
---
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---
---
---
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Current (A)
LH
W
PRODUCT
Height (H)
Length (L)
Dimensions: mm (")
Width (W)
921 (36-1/4) 871 (34-1/4) 821 (32-1/4)
194 (7-5/8)
194 (7-5/8)
HT-52 HT-48 HT-42
Model No.

Repair
[2] LUBRICATION
Apply Makita grease N. No.2 to the following portion to protect parts and product from unusual abrasion.
1) Gear room (5g: Refer to Fig. 6.)
2) Crank portion of Blade complete (2g: Refer to Fig. 8)
3) Contact portion of Spindle bottom end and Bush (a little: Refer to Fig. 8)
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Blade complete and Front handle
[1] NECESSARY REPAIRING TOOLS
CAUTION: 1) Unplug the machine for safety before repair/ maintenance !
2) Do not touch the shear blades of Blade complete !
1) Turn the machine upside down and keep it in a horizontal position using Front handle. (Fig. 1)
2) Remove two Screws and Protecting board. (Fig. 1)
3) Remove two Screws on Front handle (Fig. 2) and then push both ends of Front handle with Switch lever B. (Fig. 3)
Front handle with Switch lever B can be separated from L/R housing set.
4) Remove fourteen Screws and Housing R of L/R housing set. (Fig. 4)
5) Pick off two Pins 4 that secure Blade complete to L/R housing set. (Fig. 5)
6) Turn Gear to the direction of Blade top, and Gear itself and Blade crank portion will rise up from the original position.
(Fig. 6)
Note: 1) The shear blades of Blade complete moves when the above step is taken. Therefore, pay attention not to pinch
your finger and a part of clothes.
2) When touching the portion close to shear blades, wear a glove to protect your hand.
7) Remove Bush and Flat washer 8 from Spindle. (Fig. 7)
Blade complete and two Spindle sleeves can be removed from Spindle and Gear. (Fig. 8)
DISASSEMBLING
Fig. 1
Fig. 4 Fig. 5 Fig. 6
Fig. 2 Fig. 3
Fig. 7 Fig. 8
Code No. Description
1R034 Bearing setting plate 12.2 Removing Gear
1R269 Bearing extractor Removing Bearing box complete
Use for
P 2/ 5
Protecting board
Pin 4 Gear
Tweezers
Front handle
Front
handle
Housing R
Bush
Flat washer 8
Spindle Spindle
Screws
(2pcs.)
Screws (2pcs.)
Both ends
of Front
handle
portion
Remove the fittings.
Switch
lever B
Housing L
Blade
complete
Blade
complete
Blade complete
Spindle sleeve
(2pcs.)
Gear

Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Blade complete and Front handle (cont.)
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Gear
P 3/ 5
Fig. 9
Fig. 11
Fig. 13 Fig. 14
Fig. 12
Fig. 10
DISASSEMBLING
ASSEMBLING
ASSEMBLING
Take the disassembling step in reverse.
Note: Be sure to set Flat washer 8 and two Spindle sleeves in place. (Figs. 7 and 8)
Align the convex of Switch lever B with the depressions of L/R Housing set on the vertical lines, (Fig. 9) and then
fit their convex into their protrusions by enlarging Front grip portion carefully and shifting it. (Fig. 10)
1) Remove Blade complete, two Spindle sleeves, Flat washer 8 and Bush. (Refer to pervious page.)
2) Remove Gear and Spindle as an assembled part, and then remove Flat washer 8 between Gear and Bearing box complete.
(Fig. 11)
The assembled part can be disassembled as illustrated in Fig. 12 using 1R034 and arbor press.
Take the disassembling step in reverse.
Note: Be sure to pass Flat washer 8 through Spindle between Gear and Bearing box complete. (Figs. 11)
Spindle and Gear are directional. Refer to Figs. 13 and 14.
depression of Housing R
protrusion on the right end of
Switch lever B
Align the depression of Housing L
with the protrusion on the left end
of Switch lever B in the same step.
Enlarge both ends of Front handle
portion carefully.
Shift their ends to the fittings.
an assembled parts
of Gear and Spindle
The assembled part
of Gear and Spindle
Flat washer 8
Step of Gear
Spindle
Spindle
1R034
1R034
Gear
arbor press
Bearing box
complete
Spindle
Flat surface
of Gear

Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Armature, Switch and Power supply cord
P 4/ 5
Fig. 15
Fig. 17
Fig. 16
Fig. 18
DISASSEMBLING
ASSEMBLING
1) Remove Blade complete and Gear. (Refer to pervious pages.)
Carbon brushes, Switch and Power supply cord can be removed.
2) Remove Rod whose ends are linked to Switch lever A and Switch arm B.
Conseqently, Switch lever A with Spring, Switch arm B and Switch lever
C can be removed. (Fig. 15)
3) Separate Switch from the two pins of Housing L. (Fig. 15)
4) Remove Brush holders, and then separate Armature with Bearing box
complete from Housing L. (Fig. 16)
Note: Carbon brushes can be removed without removing Brush holders.
5) Remove Bearing box complete from Armature using 1R269. (Fig. 17)
6) Remove Ball bearings 627ZZ and 6000ZZ from Armature shaft using
1R269.
Take the disassembling step in reverse.
Note: Align the groove of Switch arm B with the vertical line of Housing L
against the bottom line as illustrated in Fig. 18.
Switch
lever A
Bearing box complete
Bearing box
complete
Ball bearing
6000ZZ (under
Armature fan)
Armature
Ball bearing
627ZZ
1R269
Carbon brushes
Brush holders
Power supply
cord
Spring
Switch lever C Switch arm B
Rod
Switch
Pins of
Housing L
vertical line of Housing L
the groove of
Switch arm B
the bottom line
of Housing L

Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Switch lever B (and Front handle)
P 5/ 5
DISASSEMBLING Fig. 19
ASSEMBLING
Refer to the clause of [3]-1.
1) When separating Front handle from Switch lever B;
- hook one end of Spring with the protrusion of Front handle.
- hook the tab of Switch lever B with the edge of Front handle. And hook
the other end of Spring with the protrusion of Switch lever B. (Fig. 19)
2) Refer to the clause of [3]-1.
and then tighten two Screws to assemble Front handle section.
protrusion of
Front handle
tab of Switch
lever B
Spring
protrusion of
Switch lever B
Circuit diagram
Color index of lead wires' sheath
Fig. D-1
Black
White
Blue
Yellow
Terminal block
Field
Brush holder
Capacitor assy
Switch