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Can anyone tell me what this little circle is and why is it leaking? 150hrs on the mower now. changed hydro oil at 50 hrs with Castrol 20w-50 Thanks

That is your brake rod and it has an o-ring to replace. Here is your repair manual.
http://www.hydro-gear.com/4d1e9474fc_sites/hydro-gear.com/files/BLN-52441_P19.pdf

I hear my link is no good so here is a new one. After you get to the page scroll down to the ZT-2800 and download it.
http://www.hydro-gear.com/download-materials/

Thanks! Do you think this would be covered under warranty?

sasser60sd said:

Thanks! Do you think this would be covered under warranty?

Click to expand...

Is the machine still under warranty..? , Did you do any work on the machine that voids that warranty..? Is the trans on a separate warranty from IT'S mfgr. ..? Have you maintained the machine I/A/W with the owner's manual, and mfgr. directives..? etc.,etc.,etc. as they say, READ the Manual, & the WARRANTY !!

Sure it not the directional cover on the bottom of it leaking. Part number 72274

I took it to my local dealer that I bought it from and they said it will be covered under warranty. He said they keep kits in stock and will do both sides as preventative maintenance. I will update when I get it back.

Mine is leaking at the same spot with 180 hours. 3 months out of warranty....:thumbdown:

Does the trans axle have to be split to replace the o-ring?

Update got it back a few weeks ago it looks to be dry and it looks like the brake rod is different doesn’t have the small dimple in it anymore.
I’m not for sure. I didn’t go pick it up but it doesn’t look like they pulled the transaxle or even drained the oil with the filters.

Any chance you can find out more information on the repair?