Zen-Noh B7000 lube question

[ErnieInTucson]

The housing for the front driveshaft universal joint has a screw in plug on the bottom of the housing and another screw in plug on the side of the housing, both with a 10 MM head. Looking at the plugs I would assume that the side plug is for adding lubricant and the bottom plug is for draining lubricant. But no lubricant drains out when the plugs are removed and I can find no reference saying to put lubricant in this housing. The documents I've checked are
Operations Manual for Kubota B6100/B7100
Parts List for Kubota B7100
I&T Shop Manual for B5100/B6100/B7100

Should I put 80W gear lube in the housing for the front universal joint?

 

[jalberts]

I have a b7000 and i know what your talking about. I used 80-90 gear lube in that u-joint housing. And also in the front axle and the outer drives on the front axle.