TM 9-2350-222-10-3
MAINTAIN MAIN GUN (CHECK AND SHIM OBTURATOR PAD) - Continued
1. Open breech (page 2-496)
and close breech (page
2-499) four times.
2. With breech mechanism
clean and lubricated,
set the adjuster at
the minimum preload
required to fully close
3. Push in on plunger
(D) and pull BREECH
OPERATING HANDLE
(E) back until breech
is locked open. Return
handle to locked position.
4. Using clean rag, wipe
grease from breech
ring (F) and obturator
pad (G).
5. Using hand pump oiler
(B) and fingers, coat
surface of breech ring
(F) with a thin film
of oil.
TA133029
3-199