My hub front hub locks up when i ride. I took out the axle to grease it if that was the problem??Did i put it in wrong ill post pics later.

Did it lock up BEFORE you greased it?

Chances are you didn't reinstall it correctly. Probably you overtightened the bearings. It's amazing how many people take out their axle and then when they replace it they tighten it as tight as they can, which is not the right way to adjust a bearing

No how do i do that.

Read this article: https://www.sheldonbrown.com/tooltips/hubs.html, or this one: https://parktool.com/repair/readhowto.asp?id=105

It explains how to repack and overhaul hubs. Read it completely and make sure you have the right tools. In the future, have SOME IDEA of WHAT you're tightening, before you tighten it. You may have ruined your hub completely if you tried to ride on that completely bound-up hub too much. Hopefully not...

Make sure that all of the bearing balls are in the right place. You might have a dislodged bearing ball that intermittantly binds up against the axle.

What kind of hubs do you have? Do they have sealed bearings or cups and cones?

Is your axle in one piece, or is it broken -which would have allowed you to remove it in two seperate pieces? Did you notice if your axle was bent?

Even if the bearings were greaseless, they probably would not lock up. How smooth did the axle rotate after you serviced it and before you installed it?

If you cup/cone type of axle, make sure the cone is locked against its jam nut. If the cone is not properly locked, it car rotate in a direction that compresses the bearing.

Eh... check bmxr07's posting history. He seems to have a history of attempting repairs with no understanding of what they involve That's why I'd guess that he has overtightened his axle bearings, which can definitely cause them to lock up.