Aftermarket BigDog / Hustler Cast Iron Spindle Assembly replaces 604255 & 607407. Fits 36″–104″ ZTR mowers including Super Z, X-One, and Diablo models. Heavy-duty construction for commercial durability.
4 in stock (can be backordered)
Description:
Non-Genuine BigDog and Hustler Cast Iron Spindle Assembly
Heavy-duty replacement part designed for ZTR commercial ride-on mowers
Suits a wide range of deck sizes from 36″ to 104″, ensuring reliable performance across multiple Hustler and BigDog series
Precision-engineered cast iron construction for strength and longevity under heavy commercial use
Replaces OEM:
BigDog: 604255, 607407
Hustler: 604255, 607407
Centre Hole Type:
Round
Deck Compatibility:
Deck Size Deck (cm) Deck (mm)
36″ 91.5 cm 915 mm
48″ 122 cm 1220 mm
52″ 132 cm 1320 mm
54″ 137.2 cm 1372 mm
60″ 152.4 cm 1524 mm
66″ 167.6 cm 1676 mm
72″ 182.8 cm 1828 mm
104″ 264.2 cm 2642 mm
Fits Models:
BigDog:
52″ (1320 mm): Diablo (models 933366EX, 935551EX, 936344EX) — 3 required per unit
60″ (1524 mm): Diablo (933242EX, 935569EX, 936351EX) / Diablo MP (933291EX, 935122EX, 937292EX) — 3 required per unit
72″ (1828 mm): Diablo (933275EX, 936443EX) / Diablo MP (935106EX) — 3 required per unit
Hustler:
36″ (915 mm): Super S Stander (model 940288EX) — 2 required per unit
48″ (1220 mm): X-One (933135EX, 934133EX, 934497EX) — 3 required per unit
54″ (1372 mm): Super Z / Super Z HD (938100EX, 938878EX), X-One (932780EX, 934158EX, 934810EX, 936740EX, 941112EX), Z Diesel (931196EX) — 3 required per unit
60″ (1524 mm): Super Z / Super Z HD / Hyperdrive / X-One / Z Diesel models (see product line note) — 3 required per unit
66″ (1676 mm): Super Z / Super Z HD (932657EX, 935494EX, 937102EX) — 3 required per unit
72″ (1828 mm): Super Z / Super Z HD / Hyperdrive / Z Diesel (932152EX, 934950EX, 935338EX, 937037EX, 940577EX, 941344EX, etc.) — 3 required per unit
104″ (2642 mm): Super 104 (931733EX, 938910EX, 939603EX, 940544EX) — 5 required per unit
Product Line Notes:
Side Discharge Models: Use 3 x JAS8565
Rear Discharge Models: Use 2 x JAS8565 + 1 x OEM 604256 / 607408 (not stocked)
Super 104 Models: Centre deck uses 2 x JAS8565 + 1 x OEM 604256 / 607408, left deck 1 x OEM 604256 / 607408, right deck 1 x JAS8565
Features:
Heavy-duty cast iron spindle housing for extended durability
Designed for professional-grade Hustler and BigDog ZTR mowers
Precision machined bearings for smooth operation
Direct bolt-on replacement for OEM units
Ideal for commercial mowing applications requiring maximum reliability
Specifications:
Property Detail
Material Cast Iron
Centre Hole Type Round
Deck Range 36″ – 104″
Application Zero Turn Ride-On Mowers
Standard Pack Quantity 1
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