This part is commonly Used on models:
NVS730AKC48000 Navigator
74311TE Z Master 8000 Series Riding Mower, with 122cm Cutting Unit
74313 Z MASTER 8000 - 25 HP KOHLER W/48"" DECK
74312 8000 Series 48 in. (122 cm) 23 hp 747cc
74315 8000 Series 42 in. (106.7 cm) 25 hp 725cc
74318 8000 Series 42 in. (106.7 cm) 26.5 hp 747cc (California Model)
74319 8000 Series 48 in. (122 cm) 26.5 hp 747cc (California Model)
