1720d yanmar

[Eagles eye]

Noticed an oil leak coming from front of 4wd shaft and when I pulled the plastic cover it is obvious that its coming from around the output from the drop box that drives the 4wd shaft.
Before I take it apart is there any warnings or things I need to look for and is it a simple driven yoke seal or do I need some sort of kit?
Thanks

 

[winston1]

Here is a thread from an individual that has been through it. Yanmar Tractor Support Message Board • View topic - Lost front wheel drive on my 4x4 tonight