B7100 front axle leak. Oil type?

[Illini22]

My b7100 started leaking oil Near front right tire (inside). It's a 4x4 and the newer style b7100. I don't have an owners manual yet ( I need one), could someone tell me the proper weight of the oil it takes? It's leaking below the axle on the hub (?) where 2 pieces join together. I'm assuming there's a gasket or seal there. Is that a large job to disassemble? I know I need pics! Thank you for the replys

 

[Egon]

It should take 80 or 90 weight gear oil.

If you do not have an online parts manual send me your email and I'll forward one.