Socket; Hammer Case Complete; Hammer Mechanism; Internal Gear 51 - Makita BTD141 Series Technical Information

R
epair
[3] -1. Disassembling/Assembling Hammer Section (cont.)
ASSEMBLING
Do the reverse of the assembling steps.
Note:
1) Assemble by piling component parts on Bearing box as illustrated in Fig. 10.
2) Make sure that twenty-four 3.5 Steel balls are in place inside Hammer.
3) Do not forget to install O ring 40 when assembling Internal gear 51 to Bearing box. (Fig. 11)
4) Internal gear 51 is not reversible when assembled to Bearing box. Be sure to assemble with the stepped end of
the gear on Bearing box side. (Fig. 11)
5) Assemble Hammer case complete to Bearing box as described in Fig. 12.
Fig. 10
Fig. 12
Fit Hammer case complete over Internal gear 51 with
the four grooves on the inside of Hammer case complete
aligned with the corresponding projections on Internal gear 51.
6) When assembling Bumper to Hammer case cover:
1. Match the depressed portions of Bumper to
the locking claws of Hammer case cover.
2. Fit the locking protrusions of Bumper in the
groove on Hammer case complete. (Fig. 13)

Hammer case complete

Hammer mechanism

Internal gear 51

O ring 40

Bearing box
Hammer case complete
four grooves on
the inside surface
Internal gear 51
Bearing box
four projections

Socket 32-50

for fixing Bearing box
Fig. 13
Hammer case complete
Fig. 11
stepped end
O ring 40
Then, using No.1R224, 1R223 and
Socket 30-78, fasten Hammer case complete
to Bearing box by turning counterclockwise
to the recommended torque of 30 - 40 N.m.
Bumper
groove on
locking claw
of Hammer case cover
P 5/9
Internal gear 51
Bearing box
Socket 30-78
locking protrusion
depressed portion