Makita HR4040C Technical Information page 12

(11) Assembling torque limiter section
1. Assemble ball bearing 1207, flat washer 12
(24mm in outer diameter) and torque limiter
complete to straight bevel gear 10. (see Fig.24)
< Note >
Be careful not to lose pin 4 for lock of
circular nut M25-35.
2. Assemble 2 change keys into the groove
on the shaft of straight bevel gear 10.
Set flat washer 12 (24mm in outer diameter)
and retaining ring S12 on the above assembled
change keys.
And then assemble flat washer 12 (28mm in
outer diameter) adjusting it in the concaves
of change keys. (see Fig.24)
3. Assemble retaining ring S12 into the groove
on the shaft of straight bevel gear 10 sliding
down 2 change keys. And make sure, whether
the retaining ring S12 is assembled in the groove
firmly. (see Fig.24 and 25)
< Note >
Be careful not to expand the retaining ring 12
too wide.
4. Assemble slide plate, compression spring 3
and guide pin 2 on change link. (see Fig.26)
5. Assemble flat washer 12 (28mm in outer
diameter) into the groove of change link
and install the assembled torque limiter
section in the ball bearing 608 which is
installed in the gear housing. (see Fig.26)
Change link
Slide plate
Compression
spring 3
Guide pin 2
Concave of
change key
Flat washer 12
(28mm in diameter)
Retaining ring S12
Flat washer 12
(24mm in diameter)
Ball bearing 1207
Straight bevel gear 10
Groove of
change link
Change key
Concave for
retaining ring
Pin 4
Circular nut M25-35
Fig. 24
Fig. 25
Flat washer 12
(28mm in diameter)