background image

C

ircuit diagram

W

iring diagram- (1) Outside and Inside

 

Motor Housing

P 7 / 8 

Fig. 16

Fig. 17

Fig. 18

Color index of lead wire sheath

Black
White

Orange

Yellow

COM

Receptacle sleeve

NO

Pull the Field lead wires out of the commutator end of Motor housing as illustrated to left in Fig. 17.
Be sure to fix the Field lead wire (yellow) with lead wire holders as illustrated to right in Fig. 17

1

2

4

5

3

Main switch

Power supply
cord

Field

Field lead wire

(orange)

Field lead wire

(yellow)

Field lead wire

(black)

Fix Field lead wire
(yellow) with lead
wire holder.

Screw
M5x55

Receptacle

Lead wire holders

Adjust the length of
Field lead wire (black)
so that the Receptacle
comes to the position
of M5x55 screw.

Noise 
suppressor

Brake switch

Adjust the length of Field lead wire
(black) so that the Receptacle comes
to the position of M5x55 screw, the
field screw.
Be sure to fix the lead wire with lead
wire holders. (Fig. 18)

(to be continued to next page)

Summary of Contents for UC3003A

Page 1: ...ally the new series includes Model UC4503A 450mm 18 chain saw which is not in the lineup of UC3001A series Input Output Max Output W 230 240 Models No Description PRODUCT Current A TECHNICAL INFORMATION CONCEPT AND MAIN APPLICATIONS Specification Standard equipment Optional accessories Note The standard equipment for the tool shown may differ from country to country Chain blade Guide bar P 1 8 Dim...

Page 2: ...e carbon brushes Remove a 4x18 tapping screw Now cover for switch can be removed from gear housing L Fig 2 to be continued to next page Gear housing L Gear housing R Straight bevel gear 14 35 31 31 Item No Part Name Amount g Portion to be lubricated Worm gear Whole part approx 1 0 35 Straight bevel gear 43 Whole part approx 3 0 CAUTION First of all remove the chain blade for your safe repair and m...

Page 3: ...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 3 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 ...

Page 4: ...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 to be continued to next page Fig 6 ...

Page 5: ...w on the edge of Gear housing R as illustrated to left in Fig 10 Close the pliers until Brake spring holder is locked in the position as illustrated to right in in Fig 10 Now clutch drum is released from Brake spring 2 By removing Safety ring and Flat washer 8 Clutch drum can be removed from Gear housing R Fig 11 Fig 9 Fig 10 Fig 11 Tapping screw BT3 5x9 5 Holder Oil pump complete Worm gear Brake ...

Page 6: ... the hole of Brake spring holder and the other jaw into Compression spring 9 as illustrated in Fig 14 By closing the pliers Compression spring 9 can be removed from Gear housing R Fig 12 3 By removing Clamp washer using a slotted screwdriver or the like Blake spring holder can be replaced Fig 15 Note Do not reuse a Clamp washer removed from Gear housing R Always use brand new one Fig 15 Fig 13 Fig...

Page 7: ...o right in Fig 17 1 2 4 5 3 Main switch Power supply cord Field Field lead wire orange Field lead wire yellow Field lead wire black Fix Field lead wire yellow with lead wire holder Screw M5x55 Receptacle Lead wire holders Adjust the length of Field lead wire black so that the Receptacle comes to the position of M5x55 screw Noise suppressor Brake switch Adjust the length of Field lead wire black so...

Page 8: ...ire black from switch installed on Gear housing L 2 After installation of Main switch put the loose portion of the Lead wires into the space illustrated in Fig 20 Main switch Main switch Lead wire holders Field lead wire orange Field lead wire yellow Lead wire black from Switch installed on Gear housing L Noise suppressor Noise suppressor Put the loose portion of lead wires into this pace Handle L...

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