C 12, TM 9-2350-230-12
CHAPTER 11
ORGANIZATIONAL MAINTENANCE-ARMAMENT
AND FIRE CONTROL
Section 11-1. PRIMARY ARMAMENT
C "Prevailing Torque", as used in this chapter,
is the force required to turn a self-locking screw or nut
in/on its mating threads before the screw head or nut
comes in contact with the surface against which it is
modified and M81E1 gun-launcher, including the
being tightened. It is a result of the self-locking feature
compressed air closed-breech scavenging system, and
of the screw or nut.
mount which are serviced by organizational maintenance
To simplify maintenance procedures, allowance
personnel.
for prevailing torque, where applicable, has been
incorporated in torque values specified. Torque values
which include prevailing torque are so identified in the
locational reference and component identification.
instructions.
TABLE 11-1. PRIMARY ARMAMENT
FIGURE REFERENCE
ASSEMBLY OR COMPONENT
REMOVE/
ADJUST
INSTALL
REPAIR
Firing Mechanism Continuity Check-Table 11-2
Counterrecoil Buffer and In-Battery Limit Switch
7.62-MM Machine Gun Mount
7.62-MM Machine Gun Spent Brass Chute and Bag
Recoil Mechanism Hand Pump and Hydraulic
Fittings
Filling and Bleeding Recoil Hydraulic System
Table 11-2.2
Buffer Bleed Line
Recoil Guard Cover and Screen
Recoil Mechanism Reservoir Components
Breech Scavenging Check Valve
CBSS Slaving System
Wiring Harness Assembly
Breech Open/Closed Switches
Firing Mechanism
Electric Drive Motor
Loading Tray and Bracket Assembly
Loading Tray and Ejector
Loading Tray Guide
Ejector Cocking Bracket
Obturator Gasket
Carrier Cover Vent Plug
Manual Drive Crank Handle
11-1