ECHNICAL INFORMATION
PRODUCT
P 1 / 8
T
Models No.
Description
UC3003A, UC3503A, UC4003A, UC4503A
Chain saws 300mm, 350mm, 400mm, 450mm
W
CONCEPT AND MAIN APPLICATIONS
For European market, the above models have been developed
as upgraded chain saws of the current UC3001A series models.
The new UC3003A seies models feature contnuous rating input
of 2000W while the UC3001A series 1800W.
L
Additionally, the new series includes Model UC4503A,
450mm (18") chain saw which is not in the lineup of UC3001A
series.
H
Dimensions: mm ( " )
Length ( L ) 470 (18-1/2)
Width ( W )
Height ( H )
179 (7)
215 (8-1/2)
Specification
Continuous Rating (W)
Voltage (V)
230 - 240
Cycle (Hz)
50 / 60
Max. Output (W)
2,200
Current (A)
8.8
Input
Output
2,000
1,100
Model No.
UC3003A
UC3503A
UC4003A
UC4503A
Chain type
91VG
Pitch
Chain blade
3/8" 46 drive links 3/8" 52 drive links 3/8" 56 drive links 3/8" 62 drive links
Gauge
0.050"
13.3
No load chain speed: m/s
300
(12)
350
(14)
400
(16)
450
(18)
Guide bar length: mm (")
Electric brake
Clutch
Yes
Yes
Standard equipment
* Guide bar scabbard .................... 1 pc.
* Wrench ....................................... 1 pc.
< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* Chain blade
* Guide bar
P 3 / 8
Repair
< 2 > Removing Gear Housing from Motor Housing for Replacement of Armature Assembly (cont.)
2. Take switch out of gear housing L, and then disconnect the connecting terminal from switch
as illustrated to left in Fig. 3.
3. Remove four 5x25 tapping screws as illustrated to right in Fig. 3.
Now motor housing can be separated from gear housing section.
Fig. 3
Connecting terminal
Gear housing section
Motor housing
Switch
Gear housing L
Tapping screw 5x25 (4 pcs)
4. Replace armature assembly as described below (Fig. 4):
1) After removing motor housing from gear housing, take armature assembly out of motor housing.
2) Remove straight bevel gear 14 from the armature. This gear can be removed by hand.
3) Remove ball bearing 629ZZ on the commutator end of armature assembly using Bearing extractor (No.1R269)
and pliers as illustrated to right in Fig. 4.
Ball bearing 6301LLB on the drive end of armature assembly can be removed in the same way.
Fig. 4
Ball bearing 629ZZ
Motor housing
Straight
bevel gear 14
Armature
Bearing extractor
(No.1R269)
< 3 > Disassembling Gear Housing
1. Remove oil tank cap, and remove chain oil from oil tank as illustrated to left in Fig. 5.
2. Separate cover plate from gear housing R by removing four BT3.5x9.5 tapping screws as illustrated to right
in Fig. 5.
Fig. 5
Gasket
Oil tank cap
Cover plate
Tapping screw
BT3.5x9.5
(to be continued to next page)
P 4 / 8
Repair
< 3 > Disassembling Gear Housing (cont.)
Fig. 6
3. Remove four 5x25 tapping screws and two 5x55 tapping
screws as illustrated in Fig. 6.
Removal of the screws will release tubular handle from gear
housing.
Tubular handle
4. Remove tubular handle from the bottom side of gear housing L
as illustrated to left in Fig. 7.
5. Remove gear housing R from gear housing L as illustrated to
right in Fig. 7.
Tapping
screw 5x25
Tapping
screw 5x55
Fig. 7
Tubular handle
Oil tank
Gear housing L
Gear housing R
Gear housing L
< 4 > Replacement of Straight Bevel Gear 43 and Oil Pump Complete
1. Remove gear housing R from gear housing L as described in "<3> Disassembling Gear Housing". (Fig. 5, 6, 7)
2. Remove ball bearing 608ZZ using Bearing extractor (No.1R269) (Fig. 8)
3. Remove safety washer from spindle. And now straight bevel gear 43 can be removed from spindle. (Fig. 8)
Note: Before installing a brand-new straight bevel gear 43, be sure to apply 3g of Makita grease N No.1 to its
gear teeth.
Fig. 8
[Gear housing viewed from the position A]
A
Straight bevel gear 43
Safety washer
Ball Bearing 608ZZ
Bearing extractor
(No.1R269)
(to be continued to next page)
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