Makita BTP131 Technical Information page 14

R
epair
[3]-2 Hammer Section
DISASSEMBLING
(6) Loosen 1R045 while paying attention not to disperse 34 pcs. of Steel ball 3 (Fig. 20).
Fig. 20
1. In order to avoid dispersing of Steel balls (34 pcs.), keep
the direction of Hammer section downward as illustrated
below when removing 1R045 from Hammer section.
ASSEMBLING
(1) Mount 34 pcs of Steel ball 3 to Outer hammer and 6 pcs of Pin 2.5 to Hammer (Fig. 21).
Fig. 21
1. After applying grease to the groove on Outer hammer for
easy setting of the Steel balls, put 34 pcs of Steel ball 3 to
Outer hammer. The space equivalent to one Steel ball 3 must
be reserved when 34 pcs are fully mounted.
2. After applying grease to 6 pcs of Pin 2.5,
mount Pin 2.5 (6 pcs.) to Outer hammer.
(2) Put Flat washer 14 for covering Steel ball 3 and insert Spindle complete through the Flat washer
and Outer hammer (Fig. 20).
(3) Mount Compression spring 22 and Hammer along with 6 pcs. of Pin 2.5 through Spindle complete (Fig. 20).
(4) Set 1R282 to the hole of Spindle complete and set 1R391 to the Hammer (Fig. 19).
(5) Pull Hammer down with 1R045 until the enough insertion space for Steel ball 5.6 is reserved by aligning
of Opening for Steel ball insertion to groove top on Spindle (Fig. 19).
(6) Mount Steel ball 5.6 (2 pcs.) (Fig. 19).
(7) Mount Ball bearing 6805LLB and Bearing case to Spindle complete. And mount 6 pcs of Steel ball 3 to Outer
hammer (Fig. 18).
2. Now, the following parts are disassembled from Outer hammer.
Pin 2.5
Compression
(6 pcs.)
spring 22
Hammer
Steel ball 3 (34 pcs.)
Pin 2.5
Outer hammer Spindle complete
Flat washer 14
Steel ball 3 Ball bearing 6805LLB
(34 pcs.)
Pin 2.5
P 14/ 18