Husqvarna RZ4623, RZ 4623 46 Zero-Turn Mower Deck Parts Rebuild Kit Fits Models. RZ 4623 – 966764501 (2011-03) RZ 4623 – 967009801 (2012-01) RZ 4623 – 967009801 (2013-05) RZ 4623 – 967009802 (2011-11) RZ 4623 – 967009804 (2013-12). Includes the Following Parts. (1) 123″ x 5/8″ Deck Belt – Replaces Husqvarna 539117245 (1) Idler Pulley – Replaces Husqvarna 532196104 (1) Idler Pulley – Replaces Husqvarna 539132728 (2) 23 Standard Lift Blades – Replaces Husqvarna 532405380 (2) Spindle Assemblies with Hardware & Grease Fittings – Replaces Husqvarna 532174356, 539107515.