Checking Knife Lock Nut Wear

IMPORTANT: Always use genuine John Deere special knife lock nuts.

Always replace lock nuts when they have been removed and reinstalled five times.

Replace the lock nut if washer loses its elasticity or has become separated from the nut.

Replace when height (A) on the worn side of the knife lock nut is less than half the total height (B).

A-Unworn Height
B-Total Height

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