Thanks for the picture!
I reached out to my contact at Lippert and your Lippert 5200lb axle uses inner bearing # 25580, outer bearing # LM67048, and grease seal # GS-2250DL which can all be found in the bearing kit # BK3-300.
If you are in need of grease for your new bearings I recommend the Prime Guard Wheel Bearing Hi-Temp Red Grease # L11380 with bearing packer # PTW1218.
I included videos of the products mentioned for you to take a look at. view full answer...