Makita HM0860C, Technical Information

P 5 /14

Fig. 8

Fig. 9

(6) Remove Fan 76 as described below;
      Holding Fan by hand, turn M6 Hex. nut located under
      Fan 76 counterclockwise with an M10 hex socket attached
      to Makita impact driver.
     Caution: Be sure to wear gloves when you hold Fan 76
                     on removing M6 Hex. nut, or Fan 76 could
                     injure your hand.

(5) Separate Rear cover from Motor housing by removing
      four M4x18 Tapping screws as in Fig. 8.

(8) Remove Ball bearing 6201LLU and Sleeve 12 from Armature assembly at the same time using Bearing
      extractor (1R269).

(9) Remove Ball bearing 608DDW and Insulation washer from Armature assembly at the same time using Bearing
      extractor (1R269).

(1) After setting Flat washer 12 in place, press-fit Ball bearing 6201LLU to the drive-end of armature shaft using
     Bearing setting plate 12.2 (1R034) and arbor press. (Fig. 9)

(7) Armature assembly can be separated from Motor housing complete by removing four 5x25 Tapping screws that
      fasten Crank housing to Motor housing complete.
      Armature assembly will be removed from Motor housing complete together with Crank housing. So remove 
      Armature assembly from the Crank housing by knocking on the end of Crank housing with wooden or plastic
      hammer. 

     Note: Don't forget to set Flat washer 12.

Rear cover

Motor housing

4x18 tapping screw
(4 pcs.)

ø

12.2mm

(1/2")

Bearing Setting

 Plate 12.2

(1R034)

Bearing Setting

 Plate 12.2

(1R034)

<6>-2. Reassembling Armature Assembly

Ball bearing 6201LLU

Flat washer 12

Ram of arbor press

Table of arbor press

(2) Gently press-fit Sleeve 12 to the drive-end of armature shaft using Bearing setting plate 12.2 (1R034) and arbor
      press. (Fig. 9)

(3) Gently press-fit Insulation washer and Ball bearing 608DDW to the commutator end of armature shaft
       using Bearing setting plate (1R034). (Fig. 10)

Fig. 10

Ball bearing 608DDW

Insulation washer: The end with smaller periphery
                               must face the direction of Ball
                               bearing 608DDW as illustrated.

(4) And then fix Armature assembly to Crank housing.
      Do the reverse of the procedure described in "Disassembling Armature Assembly" in page 4 to 5.

Sleeve 12