Oil line fitting that goes to the back of the governor has necked off. It’s the pipe that links to the oil pressure gauge. It has a filter inside the fitting. Part number 7S 2364. This number is from 66a9416 up parts book. Our tractor is mid 5000 series but we don’t have that parts book. Does anyone know where to source one please. CAT say discontinued!
There's a catalog for your serial number at https://catpublications.com/ . I hope you won't have any trouble purchasing a catalog from the site.