This spindle assembly fits 54" MTD-built decks, commonly found on riding mowers and zero-turns from Cub Cadet, Troy-Bilt, White Outdoor, Columbia, and more. Frequently used across MTD’s 800 Series lawn tractors, as well as other models, it features a 6-point star blade shaft, 4-bolt mounting pattern, and a 5.75" pulley and grease fitting pre-installed for easy replacement. Blade is secured using a nut (not bolt-through).

Replaces OEM Part Numbers:

MTD:
618-04608A, 618-0671, 618-0671B, 618-0671D
918-04608A, 918-0671, 918-0671B, 918-0671D

Cub Cadet:
618-04608A, 918-0671, 91804608A

Troy-Bilt:
618-04608A, 618-0671, 618-0671B, 618-0671D
918-0671, 918-0671B, 918-0671D, 742-04053B

Massey Ferguson:
618-04608A, 618-0671, 618-0671B, 618-0671D

Aftermarket Equivalents:
Rotary 12612, Stens 285-859, Sierra 7-03143, Oregon 82-519

Compatible Models & Brands

MTD – 800 Series Lawn Tractors
Deck: 54-inch
Models: 14AA815K004, 14AK945K004, 14AW94PK099, 17AF2ACK004

Cub Cadet:
GT1054, GT1554, GTX1054, LGT1054, LGTX1054, RZT-54

Troy-Bilt:
Big Red, GT-2554, GTX-2654, TB2454, TB2654

White Outdoor:
GT-2550, GT-2550H, GT-954, GT-954H, ZT-54

Columbia:
GT-2754KH, GT-5426, GT-5427, Q816H, Q816K, Q81GH, Q81GK, Q94GK, RZT-54, ZT-54

Craftsman:
PGT9000, ZTL8000

Huskee:
805K, 808K

MTD Gold:
815K, GTX-945, RZT-54

Yard-Man:
814K

Key Features & Specs:

• Fits 54" MTD-built decks (800 Series)

• Pulley pre-installed – approx. 5.75" diameter

• 6-point star blade shaft (uses nut to secure blade)

• 4-bolt mounting pattern

• Includes spindle housing, pulley, grease fitting

• Compatible with riding mowers, zero-turns, and garden tractors
  

Why Choose This Replacement?

• Trusted fitment across top MTD-manufactured brands

• Restores smooth blade operation and deck performance

• Easy installation with OEM-spec parts

• Durable build for heavy-duty mowing