P
7
/1
0
R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Motor Section
2) Make sure that Carbon brushes are in place on Brush holder complete and that the tail of each torsion spring is
in the notch of Brush holder complete.as illustrated on right in
Fig. 6
.
Then insert the assembly of Armature and Yoke unit into Brush holder complete.
3) Engaging Armature’s pinion gear with Spur gears in Hammering mechanism, assemble motor section to
Hammer case section. (See the left drawing in
Fig. 3
.)
4) Set Drive unit (consisting of Brush holder comp., Yoke unit, Armature and Hammer case comp.) to Housing (L)
as illustrated in
Fig. 10
.
Fig. 10
Fig. 11
ASSEMBLING
5) After setting Drive unit in place, make sure that Brush holder comp., Yoke unit, Hammer case comp. are placed
on Housing (L) as illustrated in
Fig. 11
.
6) Connect Carbon brushes to Armature’s commutator, then assemble Housing (R) to Housing (L).
When setting Motor section on Housing (L),
fit the protrusion of Housing (L) in the notch
on Yoke unit.
protrusion
notch
Yoke unit
Hammer case complete
Housing (L)
rib
rib
Brush holder
complete
anti-rotation
protrusion
Housing (L)
The end of Yoke unit has to fit
against this rib of Housing (L)
as illustrated below.
Housing (L)
Yoke unit
rib
Y
ok
e unit
Switch
Hammer case
complete
The anti-rotation protrusion of
Hammer case complete has to
be placed on the Switch side.
The flat portion of Brush holder complete
has to be at 90 degrees to the edge surface
of Housing (L).
Housing (L)
flat portion of Brush
holder complete
90 degrees
Brush holder
complete
[View from Rear cover side]