Makita DBN500 Technical Information page 12

R
epair
[4] DISASSEMBLY/ ASSEMBLY
[4]-2. Armature (cont.)
ASSEMBLING
See Fig. 12 for the assembly of Armature, Yoke unit and Motor housing set.
Fig. 12
1. Face the notch of Yoke unit toward Armature gear end side
and assemble Armature to Yoke unit.
Note • Do not hold Armature body nor Fan by your fingers,
or the fingers will be pinched between Yoke unit and the fan
of Armature which is strongly pulled toward Yoke unit.
• Do not scratch copper wires of Armature.
2. Return Carbon brushes and the ends of Torsion springs back
to the original position to set Brush holder complete in place.
(Refer to Fig. 11 of the previous page.)
3. Fit the notch of Yoke unit with the protrusion of Motor housing L
as drawn right.
Note • Do not scratch copper wires of Armature.
• The flat portion of Brush holder complete must be at 90° to
the edge surface of Motor housing L as drawn below left.
• Place Yoke unit to the inside between Ribs and Corners of
Motor housing as drawn below right.
Edge of Motor
housing L
90°
4. When you assemble Armature section to Gear assembly;
• protrude Armature gear into the internal gears in
Gear assembly first.
• The next, check their gears are engaged each other.
• Finally, push Armature to Gear assembly while
keeping gear engagement firmly.
5. Move Connecting rod and Crank to lower dead point, and fit an module
(Motor housing, Gear assembly and Main cylinder, etc.) into Housing L
as drawn right.
Ribs of Motor housing L
Notch of Yoke unit
Corners of Motor housing L
Motor housing
Gear assembly
Crank
Connecting rod
P 12/ 24
Fan (the component
of Armature)
Armature gear
end
Projection of
Motor housing L
Main cylinder