Front hub speedo drive oil seal

[Minority]

Was wondering if the large thin oil/grease 'speedo drive seal on a disc front front hub should have a spring like a normal oil seal?
The one I'm working on doesn't (have a spring) and It doesn't seem to be doing it's job that well.

[Muppet]

Spring no it dont

[Minority]

Thanks for that, I learn something new every day