NG Gauge Wheel Axle Kit
A good axle sits firmly on the depth-adjustment arm and moves smoothly through its range, feeling like one solid piece. The common killer is seizure — grease combining with dust sets solid and the axle won't move without bars and hammers, so keep it clean and lubricated. Watch the O-ring at the flanged end: once it wears, dust gets in and grease weeps out past the spindle flange, and abrasion inside the axle takes off. On early 90-series axles, check the tack welds holding the cap to the arm haven't broken, as a loose cap compromises the triple-lip seal.
Applies to: NG Gauge Wheel Axle Kit - Right AA050DA · NG Gauge Wheel Axle Kit - Left AA051DA
Arm Assembly Depth Adjuster
Check the top face of the cover plate and the slotting for rounding and wear. Inspect where the T-handle post contacts the plate — the posts thin out over time, and if one snaps you can't hold furrow depth, so check them seasonally. The more play and range of movement between handle and plate, the more your seed depth varies; a rounded, loose adjuster arm can give up to an inch of vertical movement each way, which shows up as inconsistent depth and patchy emergence. Replace the parts before that play gets away from you.
Applies to: Arm Assembly Depth Adjuster Right AA108R · Arm Assembly Depth Adjuster Left AA109L · Heavy Duty Cover Plate - Fine AA120F · T Handle Depth Adjust Heavy Duty Kit AA710HD
Depth Adjuster Spring
Springs lose tension and set over time, and a tired spring won't hold the downforce the wheel needs to run true or firm the furrow. Check for cracks, corrosion and any permanent deformation, and compare free length against a new one. Replace in matched pairs where left and right work together, so downforce stays even across the opener.
Applies to: Depth Adjuster Spring AA163
