TM 9-2350-230-12, C4
Section 3-5. (SUPERSEDED) SMOKE DEVICE SYSTEM
WITH XM176 GRENADE PROJECTOR
3-6. Firing Procedure
The following tables and illustrations provide
NOTE. Before operation the crew should be familiarized
XM176projector firing system circuit continuity check
with the location and operation of all controls (figs. 3-15
procedure, immediate action in case of failure to fire, and
through 3-17).
firing procedure.
TABLE 3-9. CHECKING XM176 GRENADE PROJECTOR ELECTRICAL SYSTEM CONTINUITY
STEP
PROCEDURE
FIG/ITEM
WARNING:
Make certain that projector mounts DO NOT contain grenade
projector assemblies.
1
Remove control box MASTER switch safety wire and FIRE switch safety
safety pin.
2
With vehicle master switch turned on, turn on grenade projector control
box MASTER switch. MASTER switch indicator lamp will illuminate.
FIRE switch ready lamp will illuminate after short warm-up.
NOTE. Turn rims of MASTER and FIRE switch indicator lights counter-
clockwise for "bright" illumination. Adjust intensity as required
after system check-out.
3
Through vehicle serial no. 699 remove protective caps from solenoids
3a
On vehicles after serial no. 699, open inspection cover and lift
solenoid guard to expose solenoid plunger.
4
Select LEFT SALVO, RIGHT SALVO, SALVO, and individual positions
3-15/A, B
with control box selector knob and actuate FIRE switch at each position.
Visually or physically inspect solenoid action in each position. If not
operating properly, notify organizational maintenance personnel.
NOTE. Approximately four (4) seconds is required between each firing
operation to recharge the system power supply.
5
After checking electrical continuity and solenoid actuation, turn control
box MASTER switch to OFF position and install safety wire. Insert
safety pin through FIRE switch guard.
3-7. Hangfire and Misfire
3-8. Non-Ignited Grenades (Duds)
a. Misfire. A misfire is the failure of a grenade
The number and precise location of all grenade duds
projector to fire due to a faulty propellant charge or firing
which have failed to function will be recorded and EOD
circuit. A misfire is not dangerous but cannot be
personnel notified of their locations.
immediately distinguished from a hangfire. Refer to table
3-10.
3.9. Storage, Shipment, and Handling
Refer to TM 3-250.
b. Hangfire. A temporary failure or delay in the
action of percussion primer, or propellant charge after
3-10. Shipping Container and Stencil Marking
FIRE switch has been actuated. Momentarily this delay
Refer to figure 3-16.
cannot be distinguished from a misfire or complete
failure.
3-24