Category : Science and Education
Archive   : 92F_TUNE.ZIP
Filename : 92F_TUNE.DOC

Output of file : 92F_TUNE.DOC contained in archive : 92F_TUNE.ZIP
Combat Arms
2869 Grove Way
Castro Valley, California 94546-6709
Telephone (415) 538-6544

Accurizing the Beretta 92-F/M-9

The tune up procedures for this weapon consist of the use of simple
stoning and smoothing in the trigger area, hammer, hammer strut and sear.
No other adjustment should be made. The result of this work will be a much
smoother trigger pull in double and single action. These procedures assume
that you are a competent armorer or gunsmith and they must not be attempted
by unqualified persons. No liability, either express or implied, is given
for the use of these procedures.



1. Complete the initial field stripping to remove the slide and barrel

assembly from the frame.

2. To prevent loss of the disassembly button and spring, be sure to
release the button pressure slowly after the removal of the
disassembly latch lever. To remove the disassembly latch lever, push
in on the disassembly latch button on the right side of the frame and,
while holding the button in, rotate the disassembly latch lever on the
left side of the frame upward until the disassembly latch lever cannot
be further rotated and is in contact with the slide rail. While still
maintaining firm pressure on the disassembly latch button, pull out
and rotate upward the disassembly latch lever in order to remove it
from the frame.

Slowly release the pressure on the disassembly latch button and remove
the disassembly latch button and disassembly latch button spring from
the right side of the frame.

When removing the left and right pistol grip stocks, the lock washers
may either remain seated or come loose. Use care not to lose the lock
washers. Remove the grip screws. Using the forefinger of one hand,
insert the finger into the bottom of the magazine well and gently push
up on the inside of the pistol grip stock. Repeat the procedure to
remove the other stock.

3. Place the Beretta 92-F on its left side and locate the trigger bar
spring just below the trigger bar. Use a pair of needle nose pliers to
carefully unseat the upper portion of the trigger bar spring from the
trigger bar. Gently lift up and remove the trigger bar spring from the
hole in the receiver. Next, remove the trigger bar by unseating it
from the frame. This is accomplished by inserting the forefinger into
the receiver and pushing outward on the trigger bar. Then pull the
trigger bar out from the right side of the weapon's frame.

a. The rear left side portion of the trigger bar contains the
trigger bar lug. The trigger bar lug should be smoothed with
either a piece of crocus cloth or hard Arkansas stone. The object
is to polish, not to remove metal.

b. On the forward left side of the trigger bar is the cross pin
(called the trigger bar post) that goes into the right side of
the frame through the trigger bar post hold and into the trigger.

Use crocus cloth to remove all burrs from the trigger bar post and
ascertain that it is as smooth as possible.

4. Next, remove the slide stop. The slide stop is located on the left
side of the Beretta 92-F. Rotate the slide stop slightly upward and
pull out until the slide stop can rotate freely downward. Then remove
the slide stop and slide stop spring.

a. The cross pin of the slide stop passes through the trigger and
should be smoothed with crocus cloth to prevent trigger drag.

5. The lanyard loop spring pin is removed next. During the removal of the
lanyard loop spring pin, be sure the drift punch described below is
left in place to prevent accidental loss of parts or injury to
yourself or others nearby.

With a 1/8 inch drift punch, drive out the lanyard loop spring pin
from the left side of the frame towards the right side. Be sure to
leave the punch in place when the pin is removed. Place the lanyard
loop on a soft support and push down firmly on the top of the receiver
to overcome the main spring tension. While maintaining downward
pressure, slowly remove the punch and then slowly release the pressure
to permit the lanyard loop and main spring to be removed.

Using a punch, remove the headed hammer pin by pushing it out from the
left to the right. Lift up and remove the hammer from the frame.
Finally, rotate the frame upside down and allow the hammer strut to
fall free of the frame.

a. Now that this portion of the disassembly is completed, take the
hammer strut and, using a hard Arkansas stone, remove all burrs
and smooth with crocus cloth.

b. Using crocus cloth, remove any burrs on the main spring.

c. Examine the hammer notches and stone smooth using a hard Arkansas

6. The final step involves removal of the sear itself. During the removal
of the sear pin, use your finger to maintain control of the sear
spring to prevent ejection of the spring and/or loss of it.

With a 3/32" punch, push the sear pin out of the sear pin hole from
the right side to the left side. Rotate the frame upside down over
your work surface. With the top of the frame resting against the work
surface, withdraw the punch to allow the sear and sear spring to fall
free and clear.

a. Using a hard Arkansas stone or crocus cloth, smooth the sides of
the sear. Clean up the sear's mating surfaces with the hard
Arkansas stone. Lastly, using the hard Arkansas stone, chamfer
the leading edge of the sear ever so slightly.

7. All work is completed. Clean the weapon with Break-Free CLP(tm) and
reassemble it. Test fire the weapon before delivering it to the

  3 Responses to “Category : Science and Education
Archive   : 92F_TUNE.ZIP
Filename : 92F_TUNE.DOC

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