Makita BTD146 Technical Information page 4

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Hammer case complete (cont.)
DISASSEMBLING
(7) Hold 134848-9 with 1R041 in Vise, and then fit the hexagonal portion of Bearing box complete into 134848-9.
(Fig. 8)
(8) Set 1R224 and 134847-1 to 1R223, and then fit the hexagonal portion on Hammer case complete into 134847-1 and
turn 1R223 clockwise. (Fig. 9)
Note: Hammer case complete has a left hand thread.
(9) Hammer section can be disassembled as drawn Fig. 10.
Fig. 8
Hammer case
complete
Hexagonal
portion of
Bearing box
complete
1R041
ASSEMBLING
(1) Reverse the disassembling steps of Hammer case complete, Hammering mechanism, Internal gear 51, O ring 40 and
Bearing box complete as drawn in Figs 10 and 9.
(2) Set 1R224 and 134847-1 to 1R223, and then fit the hexagonal portion on Hammer case complete into 134847-1 and
turn 1R223 counterclockwise.
Note: The fastening torque has to be 30N.m to 40N.m.
(3) Hook Hammer case cover to the hexagonal portion of Hammer case complete, and then fit its hooks to
the depressions on the reverse of Bumper.
Fig. 10
Fit the four projections of
Internal gear 51 into the grooves
of Hammer case complete.
Fit the stepped end of Internal
gear 51 into the groove of Bearing
box complete.
Fig. 9
1R223
134847-1
Hammer
section
134848-9
Hammer case
complete
Hammering
mechanism
Internal gear 51
O ring 40
Bearing box
complete
134848-9
Hexagonal
portion of
Hammer case
complete
Fig. 11
depressions of Bumper
hooks of Hammer case
cover
P 4/ 11
1R224
134848-9