Novatec freehub loose

Had some funny noises coming from the back of my bike so I took the cassette off and it seems the freehub is lose on my Novatec D792SB/CL-A-AA-X12. How do I fix that?

I think you can tighten it with two wrenches, or a vice and wrench combo. The axle and the end cap should have two flat bits you can grab.

Thanks. Did that but the freehub is VERY sticky then. doesn't spin well at all. I think the bearings are done

they have a bit of a design flaw with regard to the RH axle cap being too tight when fully done up and yet it comes undone when anything less than. The alloy axles are very soft. Easy to damage. I think that when the inner freehub brearing develops play the freehub body can bottom out in the hub shell despite the sleeved washer. The end cap acts directly on the bearings inner race and possibly there the rubber seal in contact too. im pretty sure i fixed mine by putting an additional thin copper washer in there, possibly inside the end cap so it was impossible for it to bind although it increased the width .5mm ish. you can run without the rubber seal and instead put some grease in the end of the freehub to keep water out.

Funny combination of issues seems to have caused the problem. Loose endcaps, seal moved so when I tightened it it wedged at a funny angle which caused loads of drag. the freehub pawls also weren’t returning for some reason. I’ve swapped it for one from my gravel bike and everything is good so I’ve bought another freehub and will fix this one and keep it as a spare.

Originally I thought the noise was the BB