Front knuckles found leaking

[First one]

I've never done a 400hr service ,so had my friend showing me just what to do and giving me tips on things as we went through it. We noticed that both front knuckles on my L3240 leaking :shocked:.I'm going to call dealer to see just how much it would cost to repair it. How common does this happen?
Is there anything that you know that would cause this to happen? or maybe something I might be doing to make them leak?

 

[puckgrinder85]

Where exactly are they leaking? I've had an wheel seal leaking after skidding logs through some fine sand. Just ended up taking it apart and cleaning the dirt out of the seal and all was good afterwards.

 

[First one]

Where exactly are they leaking? I've had an wheel seal leaking after skidding logs through some fine sand. Just ended up taking it apart and cleaning the dirt out of the seal and all was good afterwards.

They both seem to be leaking from the same spot . Where the front axle attaches to the knuckle,. The knuckles are all wet on the inner side of them, not running right out . Only one had a drip or two on the ground after about 4hrs or so. The other one looks wet .