Makita 6991D Technical Information page 3

R
epair
< 1 > Removing housing R and L
Remove hammer case from housing R and L.
And then, housing R and L can be removed.
< 2 > Removing hammer
(1) Press down hammer with 1R045: Large gear extractor
by turning the handle.
(2)Adjust the opening for steel ball inserting to the cam groove top of spindle.
(3)Take off steel ball 5.6 from spindle.
< Note > 25 steel balls 3.5 are installed in hammer.
Check the quantity when assembling.
1R045 Large gear extractor
L= 85mm
L=105mm
L=130mm
W: The maximum opening width
is 170mm.
(4) Apply MAKITA grease N No.2 to the position No. 1, 2,
3 and 4, when assembling.
(1) Spindle : 0.5g
(2) Hammer : 0.5g
(3) Opening for
steel ball inserting : 0.5g
(4) Spur gear 22 : 2.0g
Steel ball 5.6 x 2
Opening for steel
ball inserting
Steel ball 3.5 x 25
L
(4) Spur gear 22
W
Fig. 1
(3) Opening for
steel ball inserting
Steel ball 3.5 x 25
Cam groove top
of spindle
Fig. 2
P 3 / 5
Spindle
Hammer
(1) Spindle
(2) Hammer
(4) Spur gear 22