Makita BPT350 Technical Information page 9

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -6. Switch Mechanism
ASSEMBLE
(1) Insert Guide plate and Compression spring 4 into Trigger.
(2) Hook the short tail of Torsion spring 3 with Swing arm, and then insert the
Torsion spring 3 into Swing arm.
(3) Insert Swing arm into the notch of Guide plate.
(4) Insert Pin 2.5 through the holes of Trigger and the grooves of Guide plate while
setting two Torsion springs 3 as illustrated in Fig. 33 and secure Pin 2.5 with
Stop ring E-2.0.
Fig. 33
Short tail of Torsion spring 4 for Swing arm
Long tail of Torsion
spring 3 for hooking
the other Torsion
spring 3
Swing arm
Trigger
Housing
Pin 2.5
L side
Stop ring E-2.0
(5) Hook one Torsion spring 3 with the other (Ref.
Note: Torsion spring 3 for Swing arm is different from Torsion spring 3 for Guide plate and Switch arm.
(6) Hook the protrusion of Trigger with the notch of Lock arm. (Figs. 34 and 35)
(7) Install Trigger section in Housing L while compressing Compression spring 4 to put it on the rib of Housing L as
illustrated in Fig. 35.
(8) After putting Switch arm in Guide plate, insert Pin 2.5 through the holes of Guide plate and Switch arm. Pay attention
to the direction of Switch arm. Refer to Fig. 36.
(9) Install Torsion spring 4 for Guide plate and Switch arm (Ref. Fig. 33) as illustrated in Fig 37.
Fig. 34
Protrusion of
Trigger
(for Lock arm)
Fig. 36
Pin 2.5
Switch arm
Guide plate
Housing R
side
Stop ring E-2.0
Torsion spring 3
for inserting Pin 2.5
(Ref. Fig. 35)
Long tail of Torsion spring 3
(come from inside of Swing arm)
Tail of Torsion spring 3
(located out of Trigger)
Note: Switch arm has to be assembled
so as to contact Push pin.
Otherwise, the machine does not
run even if Switch trigger is pulled.
Guide plate
(Fig. 32)
Viewed from the upper side of
the assembled Trigger Section
Swing arm
Torsion spring 3
Guide plate
Trigger
Pin 2.5
Fig. 33) as illustrated in Fig. 34.
Fig. 35
Compression
spring 4
Protrusion of Trigger hooked with notch of Lock
arm
Fig. 37
1) Put short tail of Torsion spring 4
on Guide plate.
Fig. 32
Guide plate
Compression spring 4
Trigger
Housing R side
Torsion spring 3
Stop ring E-2.0
Compression
spring 4
Stop ring E-2.0
Rib of Housing L
for compression
spring 4
2) Put long tail of
Torsion spring 4
on Switch arm.
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