RZ3016 - Do you know this part?

[MikeCallery]

I am overhauling a RZ3016, contemplating buying it, and in the process noticed a part missing on one side. I've scoured eReplacment and similar online diagrams of the transmissions but they do not have the angle to show this part so I am at a loss. I "think" it has to do with the brake. I simply would like to find this part online so I can purchase and replace it. I would be grateful for any help. TIA. Picture attached.

 

[StarTech]

Hydro Gear EZT ZT-2200 transaxle.

Which items in the image are missing on the other unit. (circling would help) as everything is there in the image of the brake setup?

 

[MikeCallery]

Boy are you on target ragging me for now pointing out the part. I know in my mind I was thinking that and I thought I wrote that, but I apologize, I did not. I just edited the photo, hope this will help.

 

[MikeCallery]

I think, however, I need to pull one side off to see what is behind that clip. Is this the braking mechanism?

 

[StarTech]

It is the parking brake cog and matching brake arm. The mower doesn't a physical brake other than these parking brakes.; although, some EZT do have a braking brake setup.

The cog is PN 51635. Hydro gear doesn't list a PN for the E-clip but it is .375 EXT external retaining clip. It comes only it the seal kit.