FAIRFIELD PARTS
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Disc Hub — wear checks

Discs, hubs, bearings and bolts — the business end of the opener. Here's how to tell when it's done.

High Tensile Flange Disc Hub Nut

The disc hub takes real load, so it needs a double-taper roller bearing — not the double-row ball bearing most bearing shops will hand you, which won't take the load and will fail. Check the hub bearing for side-to-side play and spin it for any rumble or roughness that signals worn internals or dry, contaminated grease. Note the OEM hub bearings aren't sold separately by the dealer — with a genuine setup you replace the whole hub, which is the expensive way to do it.

Applies to: High Tensile Flange Disc Hub Nut AA033N  ·  Hub Bushing Seal Ring AA219  ·  Large Hub Triple Lip & Stainless Steel Sleeve AA241  ·  HT Disc Hub Washer AA506  ·  Disc Hub AA856  ·  Small Triple Lip Hub Seal AA13294  ·  John Deere Disc Hub Tapered Bearing NTN AA306037  ·  Disc Hub Tapered Bearing AA306037JD  ·  John Deere Hub AN281856  ·  High Tensile Disc Hub Bolt AW033B

Disc - Lapina

Ground conditions, sowing speed and acres all drive how fast a disc wears, but the number to watch is diameter. Most operators replace around 17 inch — push on much past that and you risk poor seed placement and, worse, chewing out your boots to save a disc. Below 16 inch is a hard stop if you don't want to be buying boots too. Remember a smaller disc has to spin more times to cover the same ground, so wear accelerates as it shrinks. And always run bevel to the furrow, or it won't cut.

Applies to: Disc - Lapina AADISC  ·  18" Disc AADISC - 18" Aricks  ·  19" Disc AADISC - 19" Aricks

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