Bought a new RC2048 for our 1025R a couple of weeks ago. Had water in the gearbox oil before we ever used it. You can see the milky oil in the sight glass. So they sent a guy out to put new chain guards on it (both defective from the factory) and change the gear box oil. He did not bring what he needed to do the oil change, but long story short, we got it changed using my tools. It's milky already again.
My concern is, where is the water getting in? The vent plug on top of the gearbox has a cap on it. On my MMM, the vent is similar and you can push it down and it pops right back up. On the brush hog, you can't push it down. It's like it's stuck down. But the dealer refused to replace it. So before I push the issue with them, I want to make sure that the vent should be spring loaded and able to move up and down. So any input from other Frontier rotary cutter owners is welcome.