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  5. Technical Information

Makita UC3003A Technical Information

Summary of UC3003A

  • Page 1

    Continuous rating (w) voltage (v) model no. Chain blade no load chain speed: m/s electric brake guide bar length: mm (") pitch chain type gauge cycle (hz) uc3003a uc3503a uc4503a uc4003a uc3003a, uc3503a, uc4003a, uc4503a chain saws 300mm, 350mm, 400mm, 450mm for european market, the above models ha...

  • Page 2

    R epair p 2 / 8 lubrication apply makita grease n. No.1 to the following portions designated by black triangle to protect parts and product from unusual abrasion. (fig. 1) removing gear housing from motor housing for replacement of armature assembly 1. After removing brush holder caps, remove carbon...

  • Page 3

    R epair p 3 / 8 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. ...

  • Page 4

    R epair p 4 / 8 disassembling gear housing (cont.) 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. 4. Remove tubular handle from the bottom side of gear housing l as illustrated to left in f...

  • Page 5

    R epair p 5 / 8 replacement of straight bevel gear 43 and oil pump complete (cont.) replacement of clutch drum and brake spring 4. Remove holder by removing bt3.5x9.5. Oil pump complete can now be removed from gear housing (r). (fig. 9) note: when installing new oil pump complete, apply 1g of makita...

  • Page 6

    R epair p 6 / 8 replacement of clutch drum and brake spring (cont.) 3. Take brake spring out of gear housing (r), then remove brake spring from the claw of brake spring holder. (fig. 12) replacement of brake spring holder 1. First lock clutch drum with brake spring using retaining ring s pliers (1r0...

  • Page 7

    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...

  • Page 8

    W iring diagram- (2) inside handle (l) p 8 / 8 fig. 19 fig. 20 1. Before installing main switch onto handle (l), fix the following lead wires with lead wire holders as illustrated in fig. 19. * field lead wire (orange) * field lead wire (yellow) * lead wire (black) from switch installed on gear hous...