Shock Hub Repair Kit – 87580643

Restore shock protection in your cutter-bar or disc-head assembly with this Shock Hub Repair Kit. Designed for the drive discs of select New Holland hay-cutting machines, the kit helps safeguard your cutterbar modules from impact damage by allowing the shock hub to shear under excessive load—preventing more costly gear or housing damage.

The kit includes the key components needed for one hub repair: a flange-head cap screw (5/8″ × 1¾″), a conical washer, a hardened washer, and the shock hub itself. With correct installation and proper torque, the hub allows for controlled failure during a jam or obstacle strike, keeping your machine productive and reducing downtime.

• Impact-safe design: The shock hub has fewer splines, so it will shear under extreme load to protect the gear teeth.
• Includes hardware: Comes complete with bolt, washer set and hub for a full repair.
• Application-specific fit: Intended for drive discs; driven discs do *not* use a shock hub. :contentReference[oaicite:1]{index=1}
• Wide machine compatibility: Fits a range of New Holland disc mower/conditioner models such as H6750, H7220, H7230, H7320, H7330, 720HD, 720TD and 750HD. :contentReference[oaicite:2]{index=2}
• Easy to source: Cross-references and aftermarket stocks available to keep you mobile. :contentReference[oaicite:3]{index=3}

Installation Tip: Clean the hub mounting surface thoroughly, apply the correct torque of 183 Nm (≈135 ft-lb) to the cap screw per spec, and ensure the shock-hub mechanism is aligned properly before installing the drive disc. :contentReference[oaicite:4]{index=4}

With this repair kit installed, you’re helping protect your cutter-bar system from costly damage and keeping your hay-cutting operation running reliably.