Z725 leaking transmission oil

[turkish]

After using my new Z725 for about the 3rd time and parking in the garage, I noticed a small amount of oil on the floor, just inside the right rear tire. It appears it had leaked from the top of the reservoir, as even the top of the clear plastic tank was wet. After the initial spillage on the floor, no more has leaked. Any ideas?

I did run across one report of a Z700 that had a similar problem. They blamed it on moisture in the oil that foamed up and out of the fill cap when it got hot. I haven't ascertained if a resolution was found. This seems like a possible case for my issue.

Also, I can see that the level in the leaking reservoir is noticeably higher than on the left side, where I've seen no leaks. If I'm reading the fill marks stamped on the inside of the reservoir, they should not be filled very high. Am I seeing that right?

 

[Spencer C]

There have been several dealer campaigns on these. Nothing major, only small issues. One of them is based on transmission caps that vent. Take a look at the black plastic screw in caps and see if they are solid or have a pin hole vent. If there is no pin hole, the mower was manufactured more than two years ago and never had the dealer campaign performed.

 

[turkish]

Thanks, Spencer. What does the vent do to fix the issue? What other common issues have been found with these? I have no doubt my mower may have been a model year or 2 old. The price was nearly $3k off of MSRP.

Eta: My caps do not have a pin hole.

 

[turkish]

Update. My dealer states that the new caps, indeed, were installed before I purchased the machine. He claims I cannot tell by looking at them but that they are the vented ones. Who knows? I'm gonna use it tonight. If it leaks again, I'll take it in to the dealer.