when in the closed position, forms a part of the clearing
cam path. You may remove the housing cover to install
or remove the bolt assembly.
The locking and unlocking cams are part of the
housing assembly. The gun indexing pin (timing pin) is
located on the housing (fig. 6-3). It is used to time the
gun when it is mated with the ammunition handling
system, or when you perform loading/unloading
procedures.
Lubricator assembly. A lubricator assembly (fig.
6-7) is attached externally to the gun housing assembly.
It is used to lubricate the bolt assemblies during gun
operation. During gun acceleration/deceleration and
when the gun is firing, an inertia-actuated pump located
within the lubricator assembly pumps the lubricant
(DOD-L-85336) through a metal tube to the gun
housing assembly. You can refill the lubricator
assembly when performing normal maintenance
procedures.
Q1.
Q2.
Q3.
REVIEW NUMBER 1
List the naval aircraft that carry the M61A1
20-mm automatic gun.
When installed in naval aircraft, the M61A1
gun has a pilot selectable firing rate of
_________________________________________.
List the primary parts of the M61A1 gun.
Q4.
Q5.
Q6.
Q7.
Q8.
Q9.
Q10.
What is the purpose of the muzzle clamp
assembly?
The M61A1 gun has six rifled barrels that are
secured to the rotor by _____________________ .
What component has front mounting points so
the gun can be mounted in the aircraft?
The rounds are guided into and out of the
extractor lip of the breech-bolt assemblies
by ______________.
List the parts contained in the main body of the
rotor assembly.
What assembly provides the main cam path that
controls the movement of the breech-bolt
assemblies?
What lubricant should you use for the M61A1
gun?
M61A1 GUN PRINCIPLES OF OPERATION
The operation of the M61A1 gun is divided into two
distinct cycles—the firing cycle and the clearing cycle.
Firing Cycle
The firing cycle begins when power is applied to the
firing contact assembly and the gun drive unit
simultaneously.
Figure 6-7.—Lubricator assembly installation (F-14).
6-6
