grease zerks on Case DC and VAC water pumps

I am working on a few Case tractors to heyyy running for sale going in near St Charles MN . Currently working on a VAC that runs fine but has antifreeze leaking from the water pump. At first I thought it was a bad gasket but after putting a new one on it still leaks. I also noticed a grease zerk and port going into the water pump, what is the purpose for that? I also noticed one on a DC4 I'm working on as well.
Any info would be greatly appreciated.
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your water pump seals are no good in other words needs a water pump . these old tractors have a zerk to grease the brgs. cant get rebuild kits anymore , or i cant find any.
 
Thanks rustred. Yeah I thought it was just a gasket but it still leaked after putting on a new one. The pump itself does wobble a bit so the bearings are most likely worn out.
 
Commercial pump houston has rebuilt several and different brands for me. They seem to have parts for many pumps
 

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