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<1> Removing armature  
       (1) Take off the rear cover from the motor housing 
             by loosening 2 pcs.of tapping screw M4x18.  
             And then take off the carbon brushes after 
             taking off the brush holder cap.

       (2) Take off the handle and controler cover
             by loosening 2 pcs.of hex socket hd.bolt M6x40
             and 4 pcs.of hex socket hd.bolt M6x30.

       (3) Dismount the motor housing by loosening 
          4 pcs.of hex socket hd.bolt M6x40.

       (4) Support the machine with the repairing jig No.1R023, 
            1R218  and 1R022.
             Put a round stick (repairing jig No.1R234 or 1R235) 
             on the armature
             The armature can be removed from the 
             motor housing by pushing  the above round stick
             with arbor press.

Screwdriver

Brush Holder Cap

Tapping screw M4x18

Hex socket hd.bolt M6x40

Hex socket hd.bolt M6x30

Controler cover

Hex socket hd.bolt M6x40

 Motor housing

Base of arbor press

Armature

1R022

1R023

1R218

1R234 or 
 1R235

Arbor press

P 2 / 12 

R

epair

Fig.1

Fig.2

Fig.3

Fig.4

Summary of Contents for HM1242C

Page 1: ...d shank This model is taking over the existing HM1202C s benefits in incredibly low noise compact body and the strongest demolishing power in this class 15 15 120 13 7 3 7 0 6 7 50 60 50 60 50 60 50 6...

Page 2: ...loosening 4 pcs of hex socket hd bolt M6x40 4 Support the machine with the repairing jig No 1R023 1R218 and 1R022 Put a round stick repairing jig No 1R234 or 1R235 on the armature The armature can be...

Page 3: ...R234 1R240 1R241 1R032 1R037 1R034 Mounting Make sure that the gears engage each other before pressing the armature with arbor press into crank housing 2 Repairing on chuck section Repairing on chuck...

Page 4: ...tool holder cover with taking off pin 6 Fig 9 Fig 8 No 1R212 Cut of tool holder cover Ring spring 29 Tool holder cover Pin 6 Roller guide Tool holder cover 3 Repairing of piston and striker Take off o...

Page 5: ...inder liner from the bit installing side Compression spring 50 Striker Ring 49 Slider sleeve 49 Cylinder liner 44 Crank housing Piston Fig 13 2 Adjust the convex of tool holder cap to the concave of t...

Page 6: ...Fig 17A 5 Assembling fluoride ring Assembling 1 Fluoride ring 28 just after assembled can not be fit precisely along the groove on the impact bolt The edge come out from the groove 2 Insert the impac...

Page 7: ...g attention to keep collared ring 24 rubber ring 25 and impact bolt guide on the slide sleeve s edge Assemble compression spring 50 to crank housing by pressing it Remarks Pay attention to the positio...

Page 8: ...And then crank housing appears Hex socket hd bolt M6x40 Hex socket hd bolt M6x30 Handle Crank Housing Crank Cap Controller cover Remarks The fresh grease to be applied has to be limited to 30 g Over...

Page 9: ...ng34 Piston Holes of Piston Cylinder liner 44 Surface marked with Slide sleeve 49 Ring 49 Cylinder liner 44 Impact bolt guide Collard sleeve Rubber ring 25 Barrel Inner part marked with and Gear part...

Page 10: ...27 56 55 53 49 O ring 34 54 Roller 12 O ring 23 Fluoride ring 28 Urethane ring 43 and roller 12 to be assembled to 32 tool holder Fluoride ring 28 and O ring 23 to be assembled to 36 impact bolt Rubb...

Page 11: ...s to be connected to brush holder mounted on opposite side of control dial Brush holder on control dial side Controller White White Black Red Black Black Black Power supply cord Pick up coil Lead wire...

Page 12: ...black and r3 white have to be set in the groove as per the illustration Rib C Controller Boss A Boss B Rib D Rib E Cord from power supply cord lead wire black and white have to be set in the groove on...

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