Makita HK0500 Technical Information page 8

Assembly
1) Check that O Ring 11 is put in O Ring case.
2) After making Flat washer13, O Ring 15 and O Ring
case pass through Impact bolt, press them into Tool
holder. (See Fig.17)
At that time use Striker as a jig putting up-side-down.
NOTE: Use O Ring 16 of Striker after removing. Be
careful about the order of
each part and the attaching direction of Impact bolt.
3) In installation, exchange Ring spring 21 for a new
one.
4) Insert Ring spring21 in Tool holder by ? driver, etc.,
use Striker as a jig in the
same way as 2), and then place Ring spring 21 into
grooves of Tool holder. ( See Fig. 18)
5) Being careful of the attaching direction of Striker,
press it into Tool holder. ( See fig.19)
Striker
O Ring case
O Ring 15
Flat washer 13
Impact bolt
Fig. 18
Striker
Impact bolt
to Bit side
Fig. 19
O Ring 11
to Bit side
Fig. 17
Ring spring 21
Groves in
Tool holder
to Bit side