This part is commonly Used on models:
74310 Z Master 8000 Series Riding Mower, with 42in Direct-Collect Cutting Unit
74311 Z Master 8000 Series Riding Mower, with 48in Direct-Collect Cutting Unit
74311TE Z Master 8000 Series Riding Mower, with 122cm Cutting Unit
NVS640CKC42000 Navigator
NVS640CKC48000 Navigator