How much hydraulic oil - Titan ZX5420?

[whiskywizard]

I can't find the volume of 20W50 needed to change the hydraulic drive oil in a 2011 Titan ZX5420.

The manual doesn't have the volume, and Toro Customer Service doesn't know and has no way of getting the info (very frustrating and disappointing).

Does anyone here know?

Thanks in advance.

Edit: I forgot to mention, the dealer doesn't know either.

 

[whiskywizard]

The dealer found the answer and called back. It takes 4L.

I wasn't completely surprised that Toro's customer service department didn't know, but I was totally surprised that they wouldn't make any effort whatsoever to get the answer. Disappointing.

Fortunately I'm very happy with the Titan ZTR.