Makita BTP131 Technical Information page 13

R
epair
[3]-2 Hammer Section
DISASSEMBLING
(1) Disassemble Impact assembly together with Motor section and separate the Motor section from the Impact
assembly in the order of Fig. 2, Fig. 3, Fig. 4.
(2) Remove Motor bracket assembly and disassemble Impact assembly (Fig. 5).
(3) Disassemble Hammer section from Gear case assembly (Fig. 5).
(4) Remove Steel balls and Bearing case from Hammer section (Fig. 18).
Fig. 18
1. Remove Bearing case from Ball bearing 6805LLB and 6 pcs of Steel ball 3
from the drum portion of Outer hammer.
Outer hammer
Steel ball 3
(6 pcs)
(5) Disassemble Steel ball 5.6 on Spindle, Compression spring 22, Steel ball 3 (34pcs), Flat washer 14,
Spindle complete from Outer hammer (Fig. 19).
Fig. 19
1. Insert 1R282 into the
hole of Spindle complete.
1R282
Spindle
complete
4. Turn the handle clockwise until the opening for
Steel ball insertion on Hammer is aligned to
top of groove on Spindle.
Bearing case
Ball bearing
6805LLB
2. Mount 1R391 to Hammer
by fitting its deep notches to
Hammer projections.
1R391
Deep notch
fitted to Hammer
5. Using a magnetized screwdriver, remove
Steel ball 5.6 (2pcs.) when the opening for
Steel ball insertion on Hammer is aligned to
top of groove on Spindle.
1R391
Spindle
1R282
1R045
Outer hammer
Steel ball 3
(6 pcs.)
Shallow notch
to be held by 1R391
Steel Ball 5.6 (2pcs.)
Bearing case
Ball bearing
6805LLB
3. Set 1R045 by holding Shallow
notch of 1R391.
1R391
1R282
1R045
Top of
groove
on Spindle
Opening for
Steel ball
insertion
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