TM 9-2350-311-34-2
5-7 OPERATING CRANK ASSEMBLY - CONTINUED
b. Inspection
1
Inspect two headed shoulder pins (3) and replace if cracked or deformed.
2
Inspect two crank rollers (4) and replace if cracked or deformed. Measure inside diameter of crank rollers
and replace if greater than 0.878 inch (22.301 mm). Measure outside diameter of crank rollers and replace if
less than 1.245 inches (3.162 cm).
3
Inspect breech crank (2) and replace if there are visible cracks. Measure outside diameter of breech crank
and replace if less than 2.89 inches (7.34 cm). Measure inside diameter of crank headed shoulder roller pin
holes and replace breech crank if greater than 0.69 inch (17.53 mm).
c. Assembly
1
Place breech crank (2) on solid surface.
2 Install two crank rollers (4) and two headed shoulder pins (3).
3 Install two new spring pins (1) to secure two crank rollers (4).
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