Makita BPT351 specifications Switch Mechanism

Repair				P 9/ 15
[3] DISASSEMBLY/ASSEMBLY
[3] -6. Switch Mechanism			Fig. 32
ASSEMBLING				Guide plate
(1) Insert Guide plate and Compression spring 4 into Trigger. (Fig. 32)			The groove
(2) Hook the short end of Torsion spring 3 with Swing arm, and then insert the				Compression
			of Guide plate
Torsion spring 3 into Swing arm. (Fig. 33)				spring 4
			to pass Pin 2.5
(3) Insert Swing arm into Guide plate so that Pin 2.5 can be passed through				Trigger
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			Inserting position of Guide plate and
Pin 2.5 with two Stop rings E-2.0.
Fig. 33			Compression spring 4 to Trigger
short end of
Torsion spring 3
for Swing arm		Viewed from the upper side of
long end of Torsion
		the assembled Trigger Section
spring 3 for hooking
the other Torsion	Guide plate	Swing arm	Torsion spring 3	Housing R side
spring 3	Housing R side
Swing arm				Stop ring E-2.0
		Torsion spring 3
				Compression
Trigger	Stop ring E-2.0	Guide plate
				spring 4

Stop ring E-2.0
Housing L side	Pin 2.5

: The components of Trigger set

Torsion spring 3 between	Trigger
Trigger and Stop ring E-20
(Hook the shot end to	Pin 2.5
the projection of Trigger.		Stop ring E-2.0
Refer to Fig. 14.)	Housing L side

(5) Hook one Torsion spring 3 with the other (Ref. Fig. 33) as drawn in Fig. 34.

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 drawn 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 drawn in Fig 37.

Fig. 34

Fig. 35

Projection of Trigger (for Lock arm)

Long end of Torsion spring 3 (come from inside of Swing arm)

long end of Torsion spring 3

(located out of Trigger)

Compression	Rib of Housing L
spring 4	for compression
	spring 4

Projection of Trigger hooked with notch of Lock arm

Fig. 36

Pin 2.5	Note: Switch arm has to be assembled
	so as to contact Push pin.
Switch arm	Otherwise, the machine does not
	run even if Switch trigger is pulled.
	Guide plate

Fig. 37

(1)Put short end of Torsion spring 4 on Guide plate.

(2) Put short end of Torsion spring 4 on Guide plate.