TM 10-3930-669-34 WARNING Use  care  when  removing  or  installing  snap  and  retaining  rings.    Snap  and  retaining  rings  are under spring tension and can act as projectiles when released and could cause severe eye injury. (5) Remove two retaining rings (12 and 13) from input shaft (11) and shaft (14). NOTE Remove chain and sprockets as an assembly. (6) Remove chain (15), drive sprocket (16), and driven sprocket (17) from input shaft (11) and shaft (14). 8-23