Owner manual

3.17. Procedure in case of malfunction
Whenever an SG 552 no longer works due
to a malfunction, proceed as follows.
•Carry out loading movement.
• Continue firing.
If the weapon does not fire:
• Insert a fresh magazine.
• Loading action.
• Continue firing.
If the weapon still does not fire:
• Put weapon on safe.
• Remove magazine.
•Loading action, hold bolt in rearmost position, check
ejection of cases and, if necessary, remove any jammed
cases or cartridges.
•Turn gas valve on position II when weapon is heavily
fouled or iced up.
• Insert fresh magazine and load.
• Set safety lever to desired firing mode, continue firing.
If the weapon still will not fire:
• Put weapon on safe.
•Unload per section 3.3.
• Clean weapon in accordance with section 4.1.
•Take up firing position.
• Load.
• Set safety lever to desired firing mode, continue firing.
If the weapon cannot be unloaded or the fault rectified by
the rifleman in accordance with the operating instructions,
a trained expert must be consulted. The following points
must be borne in mind:
•If the weapon cannot be unloaded immediately and
there is any danger of self-ignition due to a hot barrel
(140° C), wait at least 15 minutes.
• The weapon must remain in position as long as it is
loaded.
• Spectators and other unnecessary persons must be
sent away so that the problem can be tackled carefully
without disturbance.
•As long as the weapon is loaded, only trained experts
should be allowed to manipulate the weapon.
Malfunctions can largely be avoided by:
•Cleaning the weapon according to section 4.1. after
each period of firing, at the latest just after setting the
gas valve to position II.
• Carrying out cleaning in accordance with the regulations.
• Loading the magazine correctly.
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Handling
3.16. Function check
Each time the weapon is stripped, verify its functions
as follows:
Sequence of Procedure
1. Unload in accordance with section 3.3.
2. Remove magazine.
3. Inspect serial numbers.
4. Ensure that cocking handle has registered in correct
position.
5. Functions:
a) With safety lever on "S” execute loading cycle,
pull the trigger.
•Hammer must not drop, the trigger must be blocked.
b) With safety lever on "1”, pull the trigger and hold it back.
• Hammer must drop.
With the trigger held down, cycle the weapon once.
•Hammer must not drop.
Release the trigger and pull it again.
• Hammer must drop.
c) Execute loading cycle.
d) Safety lever on "3”, pult the trigger and hold it back.
• Hammer must drop.
With hammer held back, cycle the action
(allow bolt to slide forward slowly).
• Hammer must drop immediately as the bolt locks up.
Repeat the loading cycle.
• On the third loading cycle, the hammer must not
drop.
Release the trigger.
e) With safety lever on "20”, repeat procedure as under "3”.
• Hammer must drop each time.
f) Pressure point
Cycle the weapon:
• Safety lever on "1”, verify several time that pressure
point ist discernible.
6. Insert empty magazine, check that it is located firmly.
7. Bolt catch
a) Execute loading cycle.
• Bolt must be caught in its rear position.
b) Thumb up bolt catch.
• Bolt must immediately run forward.
c) Pull the trigger, apply the safety lever.
8. Check that the stowed butt is secured.
Handling
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