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UH5540-TE


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T    ECHNICAL INFORMATION
   Model No.                     UH4540 / UH5540 / UH6540                                                 W
                                                                                                                     PRODUCT
                                                                                                                       P 1 / 11

   Description                   450mm / 550mm / 650mm / Hedge Trimmers                                        L1
CONCEPT AND MAIN APPLICATIONS
   The above products are new hedge trimmer series models                                      L2
   with higher power and durability for professional use.
   Their brief features and benefits are                                                                                       H
   * Carbon brushes can be changed without dismounting
     housing.
   * Shear blade with stabilized sliding action
   * Easy to cut hedge side with the sub grip

                                                                                Dimensions : mm ( " )
                                                                 Model No.     UH4540          UH5540       UH6540
                                                                 Length ( L2 ) 830 (32-3/4) 930 (36-5/8) 1,030 (40-1/2)
                                                                 Length ( L1 )               470 (18-1/2)
                                                                 Height ( H )                200 (7-7/8)
                                                                 Width ( W )                 220 (8-5/8)
 Specification
                                                                                Continuous Rating (W)
      Voltage (V)              Current (A)                Cycle (Hz)                                          Max. Output(W)
                                                                               Input           Output
           230                      2.7                      50 / 60             600              370               500

                        Model No.               UH4540            UH5540       UH6540
   Specifications
    Blade length : mm                            450                550          650
                   (")                         (17-3/4)           (21-5/8)     (25-1/2)
    No load speed : (min -1= spm)                               1,500
    Length of stroke : mm                                         18
                       (")                                     (11/16)
    Blade pitch : mm                                              28
                   (")                                          (1-1/8)
    Clutch                                                       Yes
    Externally accessible brushes                                Yes
    Protection from electric shock                    by double insulation
    Net weight                                     3.8               4.0          4.1
    including blade: Kg (lbs)                     (8.4)             (8.8)        (9.1)
    Cord length : m ( ft )                                        0.3 (0.98)

 Standard equipment
    * Blade cover ............................................. 1 pc.
    * Hook complete ........................................ 1 pc.

   < Note > The standard equipment for the tool shown may differ from country to country.


 Optional        accessories
    * Blade cover        * Hook complete
    * Shear blade assembly
    Features      and benefits                                                                                    P 2 / 11
                                        UH4540 / UH5540 / UH6540

                   Easy to change carbon brushes.
                   No need to dismount whole of housing.
                   For changing, you can only remove
                   top cover.

       Durable gear unit equipped
       with ball bearings on both
       sides of gear shaft                 Palm fitting front
                                           grip and handle
      Double-sided,                                                            Easy to trim hedge side with
      Double Reciprocating Blades                                              the palm fitting sub grip
      for Sharp Trimming
                                                                            Firmly stabilized sliding action
       Mechanic Brake Feature                                               of shear blade by thickening
       stops the machine within                                             the sliding portion of crank and
       0.2 sec. for Absolute Safety                                         shear blade's shank.
                                                                        New type Two-hand Operation Switch.
                                                                        Three switches are installed; in handle,
                                                                        front grip and sub grip.
                                       Branch catcher equipped
                                                                        The blades start moving only when
                                       on the top of shear blade,
                                                                        any pair of these three switches are pressed.
                                       prevents the accidental shock,
                                       and the change of gear unit.

    Comparison        of products
                 Model No.                                  MAKITA                                   Competitor A
Specifications                     UH4540 / UH5540 / UH6540       UH4520 / UH5520 / UH7020 Model A1 /Model A2 /Model A3
                                                        450                               450                     550
                                     UH4540                           UH4520                    Model A1
                                                     (17-3/4)                          (17-3/4)                 (21-5/8)
 Cutting width : mm                                     550                               550                     650
                                     UH5540                           UH5520                    Model A2
                 (")                                 (21-5/8)                          (21-5/8)                 (25-1/2)
                                                        650                              700                      750
                                     UH6540                           UH7020                    Model A3
                                                     (25-1/2)                          (27-1/2)                 (29-1/2)
 Power input : W                              600                               550                        600
 No load speed : (min -1= spm)               1,500                             1,500                     1,350
 Blade pitch : mm ( " )                   28 (1-1/8)                        31 (1-1/4)                   26 (1 )
 Length of stroke : mm                         18                                21                        18
                    (")                     (11/16)                           (13/16)                   (11/16)
* Max. cutting diameter of branch              15                                11                        13
  with one stroke : mm ( " )                 (9/16)                            (7/16)                     (1/2)
 Vibration in no load operation       2.1 m/s2 (UH6540)               1.6 m/s2 (UH4520)          2.1 m/s2 (Model A2)
 Noise level in no load operation       84 dB (UH6540)                   91 dB (UH4520)           85 dB (Model A2)
 Clutch                                         Yes                           Yes                           Yes
 Reduction gears                             one gear                       one gear                    two gears
 Brake system                               mechanic                        mechanic                    mechanic
 Externally accessible brushes                  Yes                           No                            Yes
                 Length : mm ( " )         470 (18-1/2)                     410 (16-1/8)               500 (19-3/4)
 Dimensions Width : mm ( " )               220 (8-5/8)                      215 (8-1/2)                210 (8-1/4)
                 Height : mm ( " )         200 (7-7/8)                      190 (7-1/2)                200 (7-7/8)
 Net weight including                UH4540          3.89             UH4520           3.80        Model A1        4.08
 shear blades                                       (8.74)                           (8.38)                       (8.99)
 (measured by us) : Kg                               4.04                              4.00                        4.23
                                     UH5540                           UH5520                       Model A2
                      (lbs)                         (9.07)                           (8.82)                       (9.33)
                                                      4.16                              4.2                        4.43
                                     UH6540         (9.34)            UH7020          (9.26)       Model A3       (9.77)
* Max. cutting diameter of branch with one stroke : measured by MAKITA, The figures may be different from
                                                    materials to materials.
Repair                                                                                                     P 3 / 11
< 1 > Lubrication
     Apply MAKITA grease N. No.2 to the following portions marked with black triangle to protect
     parts and product from unusual abrasion. See Fig. 1.

                                                                 Helical gear




                                                                                                     Pin 5
                                                                  Lock spring 18                     (Switch rod)
                                                                 Inner sleeve
                                                                                                     Pin holder


         Gear complete                                           Spacer
                                                                 Crank

                                                                          Fig. 1


   Lubricant to be applied
                         Parts' name                Portion to be lubricated                 Volume of lubricant
                       Helical gear                Teeth portion                                3.5 g
                                                                                                2.9 g
  MAKITA grease N No.2 Lock spring 18              Whole of its inside
                       Inner sleeve                whole of its outside                         0.5 g
                       Crank                       Portion where contacts with blade shank      3.0 g
                       Pin 5 (Switch rod)          Portion where contacts with pin holder       0.1 g




< 2 > Disassembling shear blade
     1. Disassemble under cover by unscrewing 2 pcs. of tapping screws 4 x 16. See Fig. 2.
     2. Disassemble gear housing cover by unscrewing 2 pcs. of tapping screws 4 x 16. See Fig. 2.




                                                  Gear housing cover
    2 pcs. of
    Tapping
    screws 4 x 16
                                                                                Fig. 2

                                                   Under cover


        2 pcs. of
        Tapping
        screws 4 x 16
  Repair                                                                                                            P 4 / 11
      3. Unscrewing 2 pcs. of pan head screws M5 x 25 as illustrated in Fig. 3.
         
          These pan head screws M5 x 25 are the adhesive screws. It is recommended to unscrew
          with the impact driver.
      4. Align the both elliptic holes of shear blades A and B with crank, by turning spindle portion anti-clockwise
         with screwdriver inserted into the spindle's slit. See Fig. 4.
      5. Then, shear blades can be disassembled from housing. See Fig. 5.




                               Pan head screws
                               M5 x 25




                             The slit of spindle
                             for inserting screwdriver
                              Crank


                               Shear blade A
                            Shear blade B
                                       Crank, aligned
                                       with the holes of
                  Fig. 3               shear blades A and B.     Fig. 4                         Fig. 5



< 3 > Assembling shear blade
      1. Turn crank to the position where it crosses the joint of housing R and L in right angle as illustrated in Fig. 6.
      2. Align the elliptic hole of shear blades A with the same of shear blade B as illustrated in Fig. 7.
      3. Assemble shear blades with aligning the screw holes of shear blades with the same of gear housing as illustrated
         in Fig. 8.
      4. Fasten shear blades with 2 pcs. of pan head screws M5 x 25 as illustrated in Fig. 9.
          
            These pan head screws M5 x 25 are the adhesive screws. Do not use the used ones.
            Always fasten with fresh adhesive screws.




                                                                                        Pan head screws
                   Joint of                                                             M5 x 25
                    housing R and L



                           Gear                                                              Gear
                           housing                                                           housing


                             Crank

                                  Align the elliptic holes
                                  each other.
                                                 Fig. 7

                  Fig. 6                                                       Fig. 8
Repair                                                                                                             P 5 / 11
    5. Fasten gear housing cover with 2 pcs. of tapping screws 4 x 16. And then, fasten gear housing cover with 2 pcs.
       of tapping screws 4 x 16 as illustrated in Fig.10.




                                                      Gear housing cover
    2 pcs. of
    Tapping
    screws 4 x 16                                                              Fig.10

                                                      Under cover


        2 pcs. of
        Tapping
        screws 4 x 16

< 4 > Disassembling gear section (Crank section)
     1. Disassemble shear blades as mentioned in "< 2 > Disassembling shear blade" at page 3 and 4.
     2. Slightly hit the edge of gear housing with plastic hammer. Then, gear section (crank section) can be separated
        from gear housing. See Fig. 11.
     3. Disassemble ball bearing 608ZZ with No.1R269 "Bearing extractor", and stop ring E-7.        See Fig. 12.
                                                                                               Ball bearing 608ZZ
                                                                                               Stop ring E-7


                                Gear
                                housing
                                  Gear

                                   Crank
                                                                                          Fig. 12


                                        Fig. 11


     4. Pull with turning gear assembly anti-clockwise, and pull crank section with turning clockwise.
        Then, crank section can be separated from gear assembly as illustrated in Fig. 13.

                                                      
      Holder                                           It is impossible to separate these parts each other by
                                 Gear assembly        turning them reverse direction.
                                 (including holder)



                                 Crank section



                    Fig. 13
Repair                                                                                                             P 6 / 11
   5. Put holder on lock spring 18 aligning its hole with the tail of lock spring 18.
      Turning lock spring 18 with holder anti-clockwise and turning crank section clockwise, pull them as illustrated
      in Fig. 14.
    Holder                Tail of                             Holder
                          lock spring 18                                            
                                                              Lock spring 18        It is impossible to separate these parts
                                                                                    each other by turning them reverse
                                                                                    direction.
                                                                    Crank section


                                                             Fig. 14

   6. Disassemble ball bearing 6000ZZ with No.1R269 "bearing extractor", and flat washer 10.
      And then, disassemble spindle by pressing with arbor press. The crank section can be disassembled
      in crank complete, spacer and inner sleeve as illustrated in Fig. 15.

                                                                                                       Inner sleeve


                                                                                                       Spacer
                              Flat washer 10

                             Ball bearing 6000ZZ                 Spindle
                                                                                                        Crank complete


                                                            Fig. 15

< 5 > Assembling gear section (Crank section)
     1. Assemble inner sleeve spacer, crank complete and spindle as illustrated in Fig. Fig. 16.
        And apply MAKITA grease N. No.2 to the out side of inner sleeve. See Fig. 16.
                         Assemble spindle by pressing
                         with arbor press.
                          Spindle


                              Crank complete
                                                                            Apply 0.5 g of MAKITA grease N. No.2 to
                                  Spacer                                    the out side of inner sleeve.
                               Inner sleeve
                                              Fig. 16

     2. Assemble gear assembly by pressing. And apply 2.9g of MAKITA grease N.No.2 in the gear hole.
        Put holder on lock spring 18 aligning its hole with the tail of lock spring 18, and press lock spring 18 together
        with holder, into the gear hole. See Fig. 17.
                                                                 Put holder on lock spring 18
                                                                 aligning its hole with the tail
        Assemble gear assembly by                                of lock spring 18.
        pressing.
                                                                                 Press lock spring 18 together
                                                                                 with holder, into the gear hole.


                                                                                         Holder
                                                                                         Lock spring 18
                                 Apply 2.9g of MAKITA grease
                                 N.No.2 in the gear hole.


                                                          Fig. 17
Repair                                                                                                           P 7 / 11
   3. Assemble stop ring E-7, and assemble ball bearing 608ZZ by pressing as illustrated in Fig. 18.
   4. Assemble flat washer 10, and assemble ball bearing 6000ZZ by pressing as illustrated in Fig. 19.

                                    Ball bearing 608ZZ

                                    Stop ring E-7



                                                                                Flat washer 10

                                                                                Ball bearing 6000ZZ
                       Fig. 18                                      Fig. 19


< 6 > Replacing carbon brush
    1. Disassemble housing top cover by unscrewing 2 pcs. of tapping screws 4 x18. See Fig. 20.
   2. Levering up carbon brushes with small slotted screwdriver, pull out them in the direction of shown with arrows.
      See Fig. 21.
                                                                                         Pull out carbon brushes in
                                                             2 pcs. of                   the direction shown with
                   Housing top cover
                                                             Tapping screws 4 x18        the arrows.




                              Fig. 20
                                                                                            Fig. 21

   3. After making sure that the fresh carbon brushes have been installed firmly to housing, assemble housing top cover
      to housing by fastening with 2 pcs. of tapping screws 4 x 18.

< 7 > Disassembling housing
    1. Loosen 2 pcs. of tapping screws CT5 x 30, and slide the front grip section to the direction shown with the arrow.
    2. Disassemble housing top cover by unscrewing 2 pcs. of tapping screws 4 x18. See Fig. 22.

              Housing top cover
                                                                 2 pcs. of
   Tapping screw CT5x30                                          Tapping screws 4 x18




                                                                                   Front grip section




                                                                Fig. 22
                 Tapping screw CT5x30
Repair                                                                                                             P 8 / 11

     3. Loosen 2 pcs. of tapping screws 4 x 16, and disassemble under cover. See Fig. 23.
     4. Loosen 11 pcs. of tapping screws 4 x 18, and disassemble housing R from housing L. See Fig. 24.




                                                    Under cover


         2 pcs. of
         Tapping
         screws 4 x 16
                               Fig. 23




                                                                      11 pcs. of tapping screws 4 x 18

                                                                                                Fig. 24
< 7 > Disassembling armature
  1. Disassemble shear blades as mentioned in "< 2 > Disassembling shear blade" at page 3 and 4.
  2. Disassemble carbon brushes and brush holders as mentioned in "< 6 > Replacing carbon brush" at page 7.
  3. Disassemble housing L and R as mentioned in "< 7 > Disassembling housing" at page 7 and 8.
  4. Disassemble motor unit (gear housing, armature, field and lever) from housing as illustrated in Fig. 25.
     And take off field together with lever from motor unit as illustrated in Fig. 26. Separate armature from
    gear housing as illustrated in Fig. 27.




                                                          Field

            Armature
               Field
  Gear housing                                                                    Lever
                                                Lever



                         Fig. 25
                                                                  Fig. 26                                Fig. 27
 Repair                                                                                                           P 9 /11
< 8 > Assembling armature
      1. Assemble armature to gear housing as illustrated in Fig. 28.
      2. Assemble field and lever to armature as illustrated in Fig. 29. Now the motor unit has been completed.
      3. Assemble the motor unit to housing as illustrated in Fig.30.




               Fig. 28

                                                         Fig. 29
                                                                                  Fig. 30



                                                         < Note in assembling >
                                                         Take care of the following 3 points, when assembling motor unit
                                                         to housing.

                                                         1 Field has to be precisely set in in the concave for field
                                                           assembling in housing.

                                                         2 This portion for assembling front grip has to be inserted
                                                           into the hole of housing.




                                                  3 The portions 3 have to be fitted into the housing's bosses
                                                    with screw holes.
                            Fig. 30A



      4. After making sure the above 3 points, assemble another housing and fasten it with 11 pcs. of tapping screws 4 x 18.
        See Fig. 31.




                                               Fig. 31
Repair                                                                                                            P 10 / 11
< 9 > Assembling switch section
    1. Pas pin 5 through cap holder. See Fig. 32.
    2. Assemble compression spring 8 and insulation cap to the top of pin 5. See Fig. 33.
       When assembling insulation cap, bring the convex portion of cap holder into the slit of
       insulation cap. See Fig. 33A.
                                                                                     Slit of insulation cap
                                      Insulation cap

                                         Compression
                 Pin 5                   spring 8
                                         Cap holder
                 Cap holder



                                                                                              Protrusion
       Fig. 32                 Fig. 33


                                                          Fig. 33A

    3. Assemble lifter, pin holder and compression spring 5 to the lower side of cap holder. See Fig. 34.
       Assemble stop ring E-4 to fix lifter, holder, and compression spring 5. See Fig. 35.


                                                      The protrusions have to
                                                      be faced to cap holder
     Cap holder                                       side.
                                                Lifter
          Lifter
                                                                                                           Stop ring E-4
      Pin holder                                          This protruding portion
                                                          has to be faced to cap holder        Fig. 35
      Compression                                         side.
      spring 5
                                                      Pin holder


                                               Fig. 34

    4. Assemble the switch section to housing with pushing pin holder down as illustrated in Fig. 36.
       And then, assemble push cap and pin 3 to pin holder as illustrated in Fig. 36.
    5. After assembling the switch section to housing, make sure the matters mentioned in Fig. 36A.
        < Note in assembling >
        3 arms of lifter have to be located on lever, switch lever A and push cap respectively
        as illustrated in Fig. 36A.
                                                                                  View from side A
                               Side A




                                                       Pin holder
                                                      Push cap
                                                      Pin 3
                                                              Lever

                                                          Arms of
                                                          lifter
                                   Switch lever A
         Gear housing                                                                     Push cap
                         Fig. 36                                                Fig. 36A
Circuit   diagram                                                                                  P 11 / 11

      Color index of lead wires                   Noise suppressor
   Black
   White
   See-through


                                                                              COM
                                                                     NO

                                                                          Switch
                                                                                             to field core
                              Terminal block
    Power supply cord


                                                                                           Line filter



                                                                           Field




Wiring    diagram         Pass brush holders' lead wires under       Housing L      Brush holders'
                          the brush holders by bending them to                      lead wires (white)
                          the housing L side.

                                                                                                  Brush
                                                                                                   holder




                                            Fix lead wires with lead holder.




                        Line filter


     Pass field lead wires
     through line filter, and
     set the line filter in the
     position illustrated.


          Field lead wires
          (Black)



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