Replacing A Flame Sensor

M2/M3 BFV: FIRE SUPPRESSION SYST - OD1607 - LESSON 1/TASK 2

(a) Remove the lock wire from the safety pin and discard the

lock wire.

(b) Remove the safety pin from the pilot valve.

(d) Stow the antirecoil plug in the bracket.

(5) Install the vehicle ground cable.

(6) Unstow the squad seat number 4 (M2 only).

(7) Move the FIRE SUPPRESSION switch to the AUTO position.

Replacing a Flame Sensor

One of the components that might require replacement is the flame

sensor.

All four flame sensors are replaced in basically the same

way.

WARNING

Electrical current can cause burns.

Remove the

vehicle ground cable before starting the removal

procedure.

a. Removing the Flame Sensor. In preparation for removing one of

the flame sensors, stow the squad seat number 4 (M2 only) and remove

the vehicle ground cable. If the turret sensor is being removed, the

turret must be manually traversed to 3500 mils.

Then remove the

flame sensor by following this procedure:

(1) Remove the designated plug (figure 12 on the following

page) from the sensor that is being replaced, and tag the plug. The

sensor plugs are designated for removal as follows:

(a) Plug 1W11P4 to be removed from sensor 1MT1 on the left

hull behind the driver.

(b) Plug 1W11P5 to be removed from sensor 1MT2 on the right

hull behind the driver.