Makita BPT351 Technical Information page 9

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -6. Switch Mechanism
ASSEMBLING
(1) Insert Guide plate and Compression spring 4 into Trigger.
(2) Hook the short end of Torsion spring 3 with Swing arm, and then insert the
Torsion spring 3 into Swing arm. (Fig. 33)
(3) Insert Swing arm into Guide plate so that Pin 2.5 can be passed through
the grooves of Guide plate in the next step. (Figs. 32 and 33)
(4) Pass Pin 2.5 through the holes of Trigger and the grooves of Guide plate
while setting two Torsion springs 3 as drawn in Figs. 14 and 33 and secure
Pin 2.5 with two Stop rings E-2.0.
Fig. 33
short end of
Torsion spring 3
for Swing arm
long end of Torsion
spring 3 for hooking
the other Torsion
spring 3
Swing arm
Trigger
Stop ring E-2.0
Pin 2.5
Housing L side
: The components of Trigger set
(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 projection 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
Fig. 35.
drawn in
(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 drawn in Fig 37.
Fig. 34
Projection of Trigger
(for Lock arm)
Fig. 36
Note: Switch arm has to be assembled
Pin 2.5
Switch arm
Guide plate
Housing R side
Stop ring E-2.0
Torsion spring 3 between
Trigger and Stop ring E-20
(Hook the shot end to
the projection of Trigger.
Refer to Fig. 14.)
Fig.
Long end of Torsion spring 3
(come from inside of Swing arm)
long end of Torsion
spring 3
(located out of
Trigger)
so as to contact Push pin.
Otherwise, the machine does not
run even if Switch trigger is pulled.
Guide plate
Fig. 32
(Fig. 32)
The groove
of Guide plate
to pass Pin 2.5
Inserting position of Guide plate and
Compression spring 4 to Trigger
Viewed from the upper side of
the assembled Trigger Section
Swing arm
Torsion spring 3
Guide plate
Trigger
Pin 2.5
Housing L side
33) as drawn in Fig. 34.
Fig. 35
Compression
spring 4
Projection of Trigger hooked with notch of Lock arm
Fig. 37
(1) Put short end of Torsion spring 4
on Guide plate.
P 9/ 15
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 short end of
Torsion spring 4
on Guide plate.