Makita HM0860C Technical Information page 4

(2) Install Chuck ring, Urethane ring 28 and Flat washer 28 on Tool holder as in Fig. 4,
and then set Ring spring 25 with Retaining ring pliers ST-2N (1R003).
Fig. 4
Ring spring 25
<5> Disassembling/reassembling Change Ring
<5>-1. Disassembling Change Ring
(1) Remove Ring spring 50 from Change ring with slotted screwdriver.
Note: Be careful not to let Ring spring 50 pop out.
(2) Remove Plate.
(3) Remove Steel ball 4.8 (4 pcs.) by moving Change ring back and forward,
and you will find Steel balls stuck to the grease on the four grooves of Tool holder.
(4) Now Lock ring and Change ring can be removed.
<5>-2. Reassembling Change Ring
(1) Fix Lock ring to Change ring as in Fig. 5 so that the depressions of Lock ring can face the direction of
bit side.
(2) Put Steel ball 4.8 (4 pcs.) in the four grooves of Tool holder and depressions of Lock ring.
Note: Lock ring is not reversible.
(3) Put Plate in place, and then put Ring spring 50 in the groove of Change ring using slotted driver, etc.
Fig. 5
Bit side
<6> Disassembling/reassembling Armature Assembly
<6>-1. Disassembling Armature Assembly
(1) Remove Crank housing cover after disassembling Chuck section.
(2) Remove Handle by removing M5x20 Pan head screws (2 pcs.) and 5x25 Tapping screw (2 pcs.).
and then disconnect Connectors.
(3) Remove 4x18 Tapping screws on both sides of Motor housing with Phillips screwdriver. (Fig. 6)
(4) Remove Brush holder covers with slotted screwdriver inserted into the inserting spaces as in Fig. 7.
Fig. 6
4x18 Tapping screw
Phillips Screwdriver
Urethane ring 28 (reversible when assembled to Tool holder)
Flat washer 28
Ring spring 50
Plate
Lock ring
Change ring
Steel ball 4.8
Tool holder
Chuck ring
View of Lock ring from bit side
[wrong] [correct]
Four depressions Four depressions
for Steel ball 4.8 for Steel ball 4.8
cannot be seen. can be seen.
Fig. 7
Inserting space for
slotted driver
Slotted screwdriver
P 4 /14
Change ring
assembled
to Lock ring