I was worried about that. I had the thing apart before and I would have cried if I had to crack the case open again just to install those new o-rings, but they went in from the top.
Been watching from taking both units out to fix axle seal leak. I figured for sure that shaft was probably the first part installed in main case after o-rings were installed meaning a total teardown. So I suspect all other shaft seals can be installed from outside the case. I just bought a nice 2012, Z920A with 60" deck & 1,400 hrs. from original owner. My 1st "zero turn" on the farm. Spent a bunch to Tuff Torq for a seal/filter kits but I see it doesn't include the 1" plug cap below the pulley or the seal/sleeve between axle seal and axle shaft, Ugh. I called to confirm I do have the right kit. So far this is the only Channel I have found about servicing this Tuff Torq . Lots of vids about servicing the K46 in my J.D. 155c/48" deck I bought new in 2006 which J.D. lied saying it can't be serviced. At 705 hrs.,,, with new filter and Hy-Guard oil is now strong like new again. A huge Thanks to Thistle Hill Farmstead for taking time to make these vids.
