Makita HR2021 Technical Information page 3

R
epair
< 2 > Disassembling chuck section
1. Slide chuck cover in the direction of gear housing, and pull out cap 35 by turning. See Fig. 1.
2. Take off ring spring 19. Then, the following parts can be disassembled from tool holder. See Fig. 1A.
* Chuck cover
* Ring 21
3. Take off steel ball 7.0 with which guide washer and conical compression spring 21-29 are held. See Fig. 1A.
Then, guide washer and conical compression spring 21-29 can be disassembled from tool holder. See Fig. 1B.
Cap 35
Chuck cover
Gear housing
Fig. 1
< 3 > Assembling chuck section
1. Apply grease to steel ball 7.0 and cap 35 referring to < 1 > Lubrication at page 2.
2. Assemble conical compression spring 21-29 and guide washer, and hold guide washer with steel ball 7.0.
See Fig. 1B and Fig. 1A.
3. Assemble ring 21 and chuck cover to tool holder. And then, hold them with ring spring 19. See Fig. 1A.
4. Slide chuck cover in the direction of gear housing, and assemble cap 35 by turning. See Fig. 1.
< Note in assembling >
A. Pay attention to the assembling direction
of conical compression spring 21-29.
B. The cut portion of ring spring 19 has to come
to the opposite side of the flat portion of
tool holder.
Ring spring 19
Chuck cover
Steel ball 7.0
Ring 21
Fig. 1A
Conical compression
spring 21-29
Cap 35 side
The small portion : Gear housing side
The large portion : Cap 35 side
The cut portion
of ring spring 19
P 3 / 18
Guide washer
Conical compression
spring 21-29
Tool holder
Fig. 1B
Gear housing side
The flat portion of
tool holder.