618P09236 Spindle Assembly - Fits 36" 54" Mower Deck for Troy-Bilt Mustang Z54,for Cub Cadet XT1-ST ZT1-54 ZT2-54 ZTS2-54,for MTD Craftsman Z5800 Z7600 T100 T3200 Ultima ZT1,Replace 618-09236 Spindle

What It Is

The 618P09236 Spindle Assembly is a replacement part for the blade mounting hub and bearing housing on select 36" and 54" zero-turn and lawn tractor mower decks. It’s designed for Troy-Bilt, Cub Cadet, MTD, and Craftsman models that use the OEM 618-09236 spindle—typically on 54" fabricated or stamped decks.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size and type: This spindle fits 54" decks on Cub Cadet ZT1-54, ZT2-54, ZTS2-54, XT1-ST, and Troy-Bilt Mustang Z54. It also fits 36" decks on some MTD/Craftsman models like the Z5800, Z7600, T100, T3200, and Ultima ZT1. Verify your deck is stamped or fabricated 36" or 54".
• OEM vs aftermarket: This is an aftermarket replacement for OEM part 618-09236. Check your original spindle’s part number (often stamped on the housing) to confirm match.
• Physical measurements: Compare bolt hole pattern (typically 3-bolt, 3.5" center-to-center) and spindle shaft diameter (usually 5/8" or 3/4"). Measure your old spindle before ordering.

Key Things to Know

• Quality: Listed as aftermarket, not OEM. With a 5.0 rating (2 reviews), early buyers report solid build, but long-term durability on heavy commercial use is unproven.
• Installation difficulty: Moderate. Requires removing the blade, belt, and pulley, then unbolting the spindle from the deck. Expect 30–60 minutes per spindle. Basic hand tools (wrenches, ratchet, torque wrench) needed.
• Common gotchas: The pulley nut can be stubborn—use penetrating oil. Re-torque spindle bolts to spec (typically 30–40 ft-lbs). Check blade alignment after install. Some decks use different spindle heights; measure spindle length (usually ~4.5") to avoid belt tension issues.
• Warranty: No clear warranty info—confirm with seller before purchase.

Should You Buy It

If you own a Cub Cadet, Troy-Bilt, MTD, or Craftsman with a 36" or 54" deck using the 618-09236 spindle, this is a budget-friendly replacement for a worn or seized unit. It’s best for homeowners or light-to-moderate use; commercial operators may prefer OEM for longer life. Verify fitment carefully—especially deck size and bolt pattern—before ordering.