The Hustler Super Z Spindle Assembly (OEM Part Number 607407P) is a genuine replacement component designed for high-performance commercial Hustler mowers. This heavy-duty ductile spindle replaces previous part numbers 604255 and 607407, and is engineered to maintain optimal blade rotation and cutting efficiency under demanding conditions.
Compatible with a wide range of Hustler models including Super Z, Super Z HD, Super S, Super 104, Super 88, X-ONE, and Diesel Z series, this spindle assembly is precision-built to withstand shear stress without compromising deck integrity. It features a ductile iron housing for enhanced strength and longevity, making it ideal for contractors and property owners who rely on consistent performance.
The assembly includes key components such as upper and lower bearings, grease fittings, blade bolt shield, and shaft key. Always confirm compatibility using your mower’s model and serial number before ordering.

Technical Specifications:

• Part Numbers: 607407P (replaces 604255, 607407)
• Material: Ductile Iron
• Fits Deck Sizes: 36″–72″
• Compatible Models: Super Z, Super Z HD, Super S, Super 104, Super 88, X-ONE, Diesel Z
• Includes: Bearings, grease fittings, blade bolt shield, shaft key