Makita HP1640F Quick Start Manual page 4

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Carbon brush, Helical gear 45, Ball bearing 6002LLB (cont.)
ASSEMBLING
Take the disassembling step in reverse.
Also, refer to [3]-3. Armature
[3]-3. Armature
DISASSEMBLING
Note: It is not required to remove Drill chuck when replacing Armature only.
1) Remove Spindle section (Refer to Fig.5) and separate Carbon brushes from Brush holder unit.
2) Remove Armature ass'y and Cam holder complete together from Housing L and Field ass'y.
Change lever, Steel ball 5.0 and Plate 19 can be removed from Cam holder complete. (Fig. 8)
3) Remove Armature ass'y from Cam holder complete with 1R045 and 1R346. (Fig. 9)
Ball bearings on drive end and commutator end can be removed with 1R269. (Fig. 10)
Fig. 8
Change lever
Steel ball 5.0
Plate 19
Cam holder complete
ASSEMBLING
1) Mount Compression spring 15 and Ball bearing 6002LLB on Spindle.
Apply a little amount of Makita grease N No. 2 to the contact portion of Spindle
and Ball bearing 6002LLB in advance. (Fig. 1)
And then fit Retaining ring S-15 into the groove of Spindle with 1R291.
2) Receiving Helical gear 45 with 1R232, press fit the Spindle into Helical gear 45.
(Fig. 11)
Note: The cam portion of Helical gear 45 has to be faced to the opposite from Ball
bearing 6002LLB side. (Fig. 12)
Do not contact the cam portion of Helical gear 45 with 1R232.
Fig. 12
Ball bearing 6002LLB
3) Install Armature ass'y into Field ass'y. And assemble the remaining parts of Spindle section to Cam holder complete.
Refer to Figs. 13, 14. Be sure to shift Change lever to Hammer drill mode.
Fig. 13
After setting Plate 19 in place through
a slot of Cam holder complete, insert
Change lever and Steel ball 5.0 into
Cam holder complete.
Change lever
DISASSEMBLING
Fig. 9
Cam holder complete
Armature ass'y
cam portion of Helical gear 45
Viewed from the upper side
Plate 19
Put Steel ball 5.0
to the depression
on Change lever
after applying a
Change
little bit grease
lever
on the hole.
1R045
1R346
Slot for Plate 19
Axis for
Pivoting
Fig. 10
1R269
Fig. 11
Spindle
Compression
Ball bearing
spring S-15
6002LLB
Retaining
Helical
ring S-15
gear 45
1R232
Fig. 14
Change lever
Field ass'y
Spindle
section
Armature ass'y
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