Makita BTW074 Technical Information page 5

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Armature (cont.)
DISASSEMBLING
(2) Remove Armature as drawn in Fig. 5.
Fig. 5
1. Remove Internal gear case
from Motor section.
Internal gear case
ASSEMBLING
(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.
Fig. 6
1. Hold Yoke unit on workbench and
slowly insert Armature into Yoke unit
until the drive end reaches workbench.
Notch
Yoke unit
Note: Set Yoke unit with its Notch
facing to the workbench side.
(2) Assemble Motor section (Armature, Yoke unit ), Internal gear case and Brush holder as drawn in Fig. 7.
Fig. 7
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
Projection for
Notch of Yoke unit
Housing set (L)
Motor section
2. When the drive end
of Armature reaches
worktable, lift up Yoke
unit slowly.
Box portion for Slip
stopper of Internal gear case
2. Remove Armature
from Yoke unit.
Yoke unit
3. Insert the drive end of Armature
into Internal gear case. And insert
the commutator end of Armature
into Brush holder.
Internal gear case
Slip stopper of
Internal gear case
Motor section
P 5/ 15
Armature
Brush holder
Notch of
Yoke unit
Brush holder