Makita BTD140 Technical Information page 4

R
epair
[3] -1. Disassembling/Assembling Hammering Mechanism (cont.)
6) Install Center Attachment (No.1R346) on Gear Extractor, large (1R045).
(Fig. 5)
7) Set the Gear Extractor on the Hammering mechanism (= assembled unit of
Hammer, Spindle, Spur gears, Steel balls, etc.) as illustrated in Fig. 6.
Then turn the handle of the Gear Extractor clockwise to lower Hammer to
the full.
8) Align the notch in Hammer with the top of the cam groove on Spindle.
Then take steel ball 5.6 (2 pcs) out of spindle using tweezers or a slotted
screwdriver magnetized with Screwdriver Magnetizer (No.1R288). (Fig. 7)
Fig. 6
Spindle
9) Remove the Gear Extractor by turning the handle counterclockwise.
10) Remove Spindle, Compression spring 45 and Cup washer 14 from Hammer as illustrated in Fig. 8.
Important: Be sure to lower the Hammer side so that Steel balls in Hammer cannot fall down and scatter.
11) Now Steel ball 3.5 can removed from Hammer. There are 26 steel balls in the groove on the inside of Hammer.
(As illustrated in Fig. 9, the groove is designed to have a space equivalent to one steel ball.)
Fig. 8
Hammer
Fig. 7
Hammer
No.1R346
No.1R045
Fig. 9
Steel ball 3.5
(26 pcs)
Fig. 5
Top of Cam groove
on Spindle
Hammer
P 4 / 9
1R045
1R346
Steel ball 5.6
Notch for
Steel ball insertion
space equivalent to
one steel ball