Makita HM1213C Technical Information page 7

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 Crank housing side as illustrated in Fig. 11R.
Fig. 11R
Correct
One way
Cylinder 40 valve guide
Crank housing side
(2) Assemble X ring 21, O ring 23 and Fluoride ring 28 to Impact bolt as illustrated 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) Orange color of O ring 38 shows through Fluoride ring 28 on Impact bolt as the fluoride ring 28 becomes worn.
If the above case appears, be sure to replace O ring 38, Fluoride ring 28 and X ring 21 with the new ones at the
same time.
2) Wash inside of Tool holder when dust is found out.
3) If once Fluoride ring 28 extends, it does not shrink by itself and therefore installing it to Impact bolt without
the proper step causes breakage. Use 1R214 before setting Fluoride ring 28 in place.
(3) Mount Shoulder sleeves and Rubber ring 24 to Impact bolt as illustrated in Fig. 13.
Fig. 13
Note: Pay attention to the directions of Shoulder sleeves.
See illustration below.
Shoulder
Impact bolt
sleeve
(4) Take the disassembling step in reverse. Refer to Figs 10 and 8.
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. 11F
Cylinder 40
Crank housing side
Taper sleeve
(No.1R214)
Insert Impact bolt from
the HR5001C side of
Taper Sleeve. And keep
it approx. 60 seconds
in Taper sleeve.
Wrong
One way
valve guide 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
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