Shoulder Sleeve; Impact Bolt; Rubber Ring; Striker - Makita HM1205C Technical Information

R
epair
[3] ASSEMBLY/ DISASSEMBLY
[3] -2. Impact bolt, Cylinder, Striker (cont.)
ASSEMBLING
(1) Insert Striker with O ring 31.5 into Cylinder 40 so that O ring 31.5 faces to Crank housing side as drawn in Fig. 10.
Fig. 10
Correct
One way
valve guide
Cylinder 40
Crank housing side
(2) Assemble X ring 21, O ring 23 and Fluoride ring 28 to Impact bolt as drawn in Fig. 12.
Fig. 12
Before Correction:
Rings' edges are protruding from
the top edge of the groove on

Impact bolt.

Fluoride ring 28
X ring 21
groove on Impact bolt
Note:1) If Fluoride ring 28 is worn, O ring 23 (orange) appears through Fluoride ring 28 on Impact bolt.
If so, be sure to replace O ring 23 together with Fluoride ring 28 and X ring 21 with new ones.
2) If there is dust in Tool holder, wash it off.
3) Once Fluoride ring 28 deforms, it does not shrink by itself. If installing it into Impact bolt
without the proper step, it may result in its breakage. So insert Impact bolt into Taper Sleeve (1R214)
for about 60 seconds to fit Fluoride ring 28 into the groove on Impact bolt.
(3) Mount Shoulder sleeves and Rubber ring 24 to Impact bolt as drawn in Fig. 13.
Fig. 13
Note: Be careful of the directions of Shoulder sleeves.
See the drawings below.
Shoulder
Impact bolt
sleeve
(4) Assemble components by reversing the disassembly steps (3) to (1). (Refer to Figs. 9 and 7.)
O ring 31.5

Striker

Impact bolt side
Assemble of Rings to Impact bolt
Impact bolt
O ring 23
Shoulder
Rubber
sleeve
ring 24
Fig. 11
One way
valve guide
Cylinder 40
Crank housing side
Taper sleeve
(No.1R214)
Insert Impact bolt into
the HR5001C side of
Taper Sleeve. And keep
it approx. 60 seconds
in Taper sleeve.
P 7/ 17
Wrong
O ring 31.5
Striker
Impact bolt side
After Correction:
Rings' edges are positioned
under the top edge of the
groove on Impact bolt.
Corrected