Manual

14
2. SERVICE MANUAL
2.1. General
The sniper rifle and optical sight should be kept in good repair and
in a ready-for use condition, which can be obtained by timely and
skilful cleaning and lubricating, careful handling, proper storage,
timely technical inspection and remedying of the troubles.
2.2. Safety precautions
2.2.1. To carry out training in disassembly and assembly of the rifle
use blank rifles only. Training with service rifles is allowed only in
exceptional cases keeping particular care when handling parts and
mechanisms.
2.2.2. Prior to preparing the rifle for firing and also prior to its
cleaning and lubricating be sure that it is not loaded. During firing
practice with the loaded rifle never direct the rifle to people or
domestic animals.
Firing practice is carried out in the closed shooting gallery only
when the suction-and-exhaust ventilation is provided there, because
powder gases, liberated when shooting, are toxic. On finishing the fire
unload the rifle and set it at safe.
2.3. Preparing of sniper rifle and optical sight for firing
2.3.1. Preparation of the sniper rifle and the sight for firing is
accomplished with a view to ensure their trouble-free operation during
firing.
To prepare the rifle and the sight for firing, proceed as follows:
a) clean the rifle;
b) inspect the disassembled rifle and lubricate it;
c) inspect the assembled rifle and sight;
d) check the rifle mechanisms and parts for proper interaction;
e) check the illuminating system and reticle illuminating set for
sound condition;
f) check the sight angle and deflection correction mechanisms for
proper operation;
g) check the screen of the sight PSO-1 for switching in and off;
h) activate the sight PSO-1 screen.
Directly before firing, wipe dry the barrel bore (the rifled portion
and the cartridge chamber), inspect the cartridges and load the
magazine with them.
For the process of activating set the screen switching lever into
position along the sight axis, put the sight in such a position in
which the whole surface of the light filter is exposed to the light
source, radiating ultraviolet rays.
The reactivating time, when the screen is lit with daily scattered
light, will be equal to 15 minutes, when lit with straight sun rays or
with rays irradiated by an electric lamp (100š200W) at a distance of 20
cm, it will be within 7š10 minutes. Reactivation of the screen for a
more longer period of time than indicated one does not increase its
sensibility. Useful life of a reactivated screen is 6 - 7 days, after
this period reactivation should be repeated. One reactivation is
sufficient for the sight operation during 3 days (at 8-hours operation
in a day).