Makita GA7020R Technical Information page 8

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Shaft lock mechanism
DISASSEMBLING
(1) Remove Gear housing complete from Motor housing.
Remove Bearing box from Gear housing complete as illustrated in Fig. 2.
(2) Remove Armature from Gear housing complete as illustrated in Fig. 3.
(3) Shaft lock mechanism can be disassembled as illustrated in Figs. 16 and 17.
Fig. 16
Shoulder pin 5
Applying 1R268 to Shoulder pin 5 through the small hole
on Pin cap, tap 1R268 with Plastic hammer.
Shoulder pin 5 comes out from Gear housing complete.
ASSEMBLING
(1) Be sure to use a new Pin cap for replacement and to remove all the plastic dust on Shoulder pin 5. (Fig. 18)
(2) Assemble the parts for Shaft lock mechanism as illustrated in Fig. 19.
Fig. 18
Make sure that O ring 9 is
mounted to Shoulder pin 5
illustrated below.
Plastic dust
Shoulder pin 5
O ring 9
1R268
Pin cap
Fig. 19
Insert Shoulder pin 5
through the hole of Gear
housing complete.
Shoulder pin 5
Fig. 17
Note: Do not reuse Pin cap, Removal of
Shoulder pin 5 damages the inside surface
of Pin cap, producing plastic dust.
Release 1R268 from Pin cap while paying
attention that Pin cap would not be slung
by Compression spring 12.
Assemble Compression spring 12
and Pin cap by pressing them to
Shoulder pin 5.
P 8/ 9
Pin cap
Compression
spring 12
Pin cap
Compression
spring 12