New Holland CX720 Repair Manual page 1717

POWER PRODUCTION - ENGINE
9. Key the ring seal (1) onto the crankshaft, on which
you should apply the tool (3):
296166, for the F2B engine;
296168, for the F3A engine.
Screw down the nut (4) to mount the ring seal (1)
completely in the cover (2).
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