Disassembling/ Assembling Of Gear Case Section - Makita BFL301F Technical Information

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[3] -6. Disassembling/ Assembling of Gear case Section

DISASSEMBLING
(1) Remove Switch lever, Switch cover and Compression spring 2. (Refer to [3] -1.)
(2) Remove four M4x22 Pan head screws to separate Clutch case from the machine.
(3) Remove seven M3x20 Pan head screws to separate Housing (L) from (R).
(4) Remove switch unit from Gear case.
(5) Separate Gear case section from Motor control unit by lifting up them, then turning Motor bracket counterclockwise.
(Fig. 20)
(6) Pull off Motor bracket from Rotor, and then pull off Rotor from Motor control unit.
(7) Remove Lock washer located in Gear case by turning counterclockwise with pliers or slotted screwdriver. (Fig. 21)
(8) Remove Spur gears, Internal gear, Carrier complete and Ball bearing 6805LLB.
Fig. 20
Gear case section
Turn Motor bracket counterclockwise, and then
Separate Gear case section from Motor control unit.
ASSEMBLING
(1) After applying Makita grease N No.2 (2g) to teeth of all Spur gears, shafts of Carrier complete and shafts of
Spur gear 20 complete, assemble Ball bearing 6805LLB and Carrier complete A to Gear case. (Fig. 1)
And then assemble Internal gear 47 and Spur gears from the opposite side.
(2) Install Rotor into Motor control unit as described below;
Fix Motor control unit on table and insert Rotor slowly into Motor control unit till it touches the surface of the table.
Then lift up Motor control unit gradually till it stops. (Fig. 22)
Caution: 1. Before installation, be sure to remove metal chips or debris from Rotor as it has strong magnet
and be very careful not to pinch your fingers between Rotor and metal parts.
2. Be careful not to give an impact on the printed wiring board of Motor control unit.
(3) Install Lock washer on Gear case. Then put Motor bracket on Gear case, and turn it clockwise to lock in place.
(Reverse the steps drawn in Figs.20 and 21)
(4) Assemble Gear case section and Motor control unit to Housing (R) so that the lead wires of Motor control unit and
the installation portion for Switch unit on Gear case face the side of the LED - Trigger switch line. (Fig. 23)
When assembling, fit the boss on Housing (R) in the notch in Motor control unit. (Fig. 24)
Fig. 22
Fix Motor control unit, and insert Rotor.
Lift up Motor control unit till it stops.
Fig. 23
Gear case
Installation portion
for Switch unit
Motor bracket
Motor control
unit
Motor control unit
Lead wires
Fig. 21
Lock washer
Turn Lock washer counterclockwise using pliers
or slotted screwdriver, and
Remove from Gear case section.
Fig. 24
Motor control unit
notch
boss
Housing (R)
P 8/ 14
Gear case section