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[3] DISASSEMBLY/ASSEMBLY

[3] -2. Armature (cont.)

(1) Insert Armature into Yoke unit so as not to damage the wiring of Armature and not to be pinched your fingers

      between yoke unit and Armature fan. And insert the drive end of Armature into Internal gear case as drawn in 

Fig. 6

.

(2) Assemble Motor section (Armature, Yoke unit ), Internal gear case and Brush holder as drawn in 

Fig. 7

Fig. 6

Fig. 7

ASSEMBLING

DISASSEMBLING

1. Hold Yoke unit on workbench and 

    slowly insert Armature into Yoke unit 

    until the drive end reaches workbench.

2. When the drive end 

    of Armature reaches

     worktable, lift up Yoke

    unit slowly.

Notch

3. Insert the drive end of Armature

    into Internal gear case. And insert

    the commutator end of Armature

    into Brush holder.

Internal gear case

Yoke unit

Brush holder

Fig. 5

Armature

Yoke unit

Internal gear case

Motor section

Notch of 

Yoke unit

Housing set (L)

Brush holder

Assemble Internal gear case, Yoke unit, Armature and Brush holder to Housing set (L) by the following points.

* setting the slip stopper of Internal gear case to the box portion of Housing set (L)

* setting the notch of Yoke unit to the projection of Housing set

(2) Remove Armature as drawn in 

Fig. 5

.  

1. Remove Internal gear case

    from Motor section.

2. Remove Armature

    from Yoke unit.

Note

: Set Yoke unit with its Notch

          facing to the workbench side.

Motor section

Projection for 

Notch of Yoke unit

Box portion for Slip 

stopper of Internal gear case

Slip stopper of 

Internal gear case

P  

5

/ 1

5

Summary of Contents for BTW074

Page 1: ...ge 6 Capacity Ah Cell Voltage V 14 4 0 2 500 0 2 700 0 3 500 65 660 575 4 95 970 841 5 Standard bolt High tensile bolt Driving shank M5 M12 3 16 1 2 M5 M10 3 16 3 8 Yes Yes Yes Yes Yes Yes Electric br...

Page 2: ...tions designated with the black triangle to protect parts and product from unusual abrasion Item No Description Anvil Drum portion which is accepted by Needle bearing 1412 mounted in Hammer case compl...

Page 3: ...pression spring and Switch plate complete or Cover complete as shown in Fig 2 Model No Max fastening torque Distinctive Parts BTW073 BTW074 BTW103 BTW104 65 N m 95 N m BTD063 Cover complete white BTD0...

Page 4: ...f Torsion spring 2 Take out Carbon brushes Then disassemble Armature and Yoke unit from Brush holder 1 Loosen four M4x22 Pan head screws and separate Hammer case complete from Housing set 2 Loosen two...

Page 5: ...end of Armature into Internal gear case And insert the commutator end of Armature into Brush holder Internal gear case Yoke unit Brush holder Fig 5 Armature Yoke unit Internal gear case Motor section...

Page 6: ...tails and Spacers as drawn in Fig 9 2 Assemble Switch with F R change lever to Housing set L Prong portion of F R change lever Projection of Switch Pig tails Note Make sure that the loosening of Pig t...

Page 7: ...Internal gear case as drawn in Fig 3 2 Remove Internal gear case from Armature as drawn on the left in Fig 5 3 Remove Ball bearing 6801LLB from Internal gear case as drawn in Fig 11 Tap Internal gear...

Page 8: ...ssembled easily set Hammer case complete on 1R232 Refer to the drawing on the left in Fig 12 3 Assemble Ring spring 7 as drawn in Fig 14 Anvil and Nylon washer 14 are removed from Hammer case complete...

Page 9: ...shown below in Fig 16R and then release it from 1R045 Caution Do not hold Hammer section as shown below in Fig 16F when releasing Hammer section from 1R045 Failure to follow this instruction could cau...

Page 10: ...mbly procedure Refer to Fig 17 Note for Assembling Before putting Flat washer 24 in Hammer make sure that twenty four Steel balls 3 5 are put in the groove of Hammer as shown in Fig 18 There will appe...

Page 11: ...to M2 Terminal of Switch Viewed from Housing set L side Viewed from Housing set R side Viewed from Rear side M1 M1 M2 M1 30 5 M2 BTW073 BTW103 without Automatic Impact Stop System BTW073 BTW103 witho...

Page 12: ...ors in Connector Box A Lead wire holder B Rib F LED Boss Rib E Switch Line filter Route Lead wires connected to Switch between Boss and the inner wall of Housing set L BTW073 BTW103 without Automatic...

Page 13: ...of lead wires sheath Black Blue Red BTW074 BTW104 equipped with Automatic Impact Stop System Green Gray White Orange Wiring to M1 Terminal of Switch Wiring to M2 Terminal of Switch Viewed from Housing...

Page 14: ...e of Lead wires blue black red and gray between Rib A and the inner wall of Housing set L Route the bundle of Lead wires blue black red and gray between Rib B and the inner wall of Housing set L Route...

Page 15: ...set L Boss Be careful not to route any Lead wires on this Rib Route Lead wires of Impact finish indicator lamp between the Ribs Secure lead wires of both Connectors 6 pin with Lead wire holders Impac...

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