VI. To Remove Breechblock.
1. Remove operating-shaft detent, slide operating handle to the right as far as the chain will permit, remove 1-16 inch split pin from studlink pin.
2. Remove chain, piston rod, spring piston, piston-rod nut, and locknut as a unit by drawing out of closing-spring case.
3. Remove closing spring from case.
Note.—For complete instructions regarding disassembly of the breech mechanism see page [19].
4. Remove trigger-shaft detent split pin and trigger-shaft detent by drawing it out of the breechblock to the right.
5. Remove trigger shaft by prying gently straight down with screw driver or similar tool. Keep breechblock supported for all succeeding operations.
6. Remove operating handle by sliding to the right and off operating shaft.
7. Remove operating shaft by sliding to the left.
8. Raise breechblock as far as possible (about 3-8 inch), move bottom part of operating arm to the rear, and remove operating arm.
9. Remove breechblock by sliding down free of breech ring.
10. Remove extractors by sliding toward center line of gun.