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For 500, 501, 596, 770. Will not fit the 780. Will replace 549977R1.

Spool, 5 1/2" x 1 15/16", 1 1/8" square hole.

Has 1-3/4" round center hole for axle sizes from 1-1/8" to 1-1/2" square. 

Fabricated Disc Spool for 11 inch Spacing Units. Fits 637, 640, 650 Discs and 510, 512 Disc Rippers. Replaces AN260397 and AA29482.

Fits 300 Series Discs and 635, 640 Tandem Discs. Replaces B34211.

Spool, 5 1/2 inch for models with 9 inch spacing. Will replace JD A37023 and N241314. Used on 220, 225, MX225, 621, 627, 630, 637, 655, 660 disc harrows and 714 mulch-tiller.