39m schwing. 9" rams. Every year it's the same story since the pump was new. First time it the temp goes below freezing the rams leak . 

It did just the same on mine i taught it was because they were getting old.Put brand new two weeks ago and no leaks since then.My old rams were 10 month old ,900 hours ,2000-2500 sq meter pumped.

Don't fill the water box past the bottom of the ram seals.Year round

Specialy over night i've heared. Our putz guy says if you start pumping and the seals are stil cold you don't want water there. Always have the level in the water box below the seals..

I just changed my cups, they were leaking quite a bit ...

 Try hot water in the water box, let things warm up.

 Depending on your yearly yardage, that might not be bad.

Changed out the rams , diff packing , and scraper. New rams and packing logged in at 325,790 yds since new and 19,253 on the changed out rams.