Front wheel hub leak

[clamb]

I have a Satoh Buck S470.

It has been owned by my family since mid 1980's and some of the maintenance has been neglected.

Noticing the front hub has been leaking.

Do I need to replace some parts or seals on the front king pins?

Haven't found much info on the front diff, besides thatvit uses sae 80 or she 90 or an 80w-90 gear lube.

 

[clamb]

I see that it is all the same compartment.
There is a drain plug for the diff bell, & a drain on each wheel hub.
Oil looked darker in the wheel hubs than in the bell of the diff. I estimate that it will hold about 2-3 liters of gear oil.

 

[470d]

I also developed this leak on right side and now the left side. Does anyone have any info concerning how to do this and where to source the required parts.

So far I'm just topping off as the gear oil is lost.

So far the best info I found on this came from this link:

(Delete all +++ symbols)

https:// +++mitsubis ++++hitractors.grou ++++ ps.io/g/mai ++++ n/topic/leaking_sa +++++ toh_buck_front_axle/ ++++++87909011?p=Created%2C +++++ %2C%2C20%2 ++++++ C1%2C20%2C0&jump=1

(Mods if it's not allowed to share links please delete, just trying to point to a good resource about this)
If anyone can point to additional info it would be appreciated.