Toro MX5060 Questions

Below are questions I've researched and can't find the answers to in regard to the Toro MX5060:



1. Does anyone here know if the control arms are dampened?



2. Other than the total of 4 zerks on the front caster wheels is everything else sealed that would in times past probably had a zerk?



3.How heavy a load can one reasonably pull in a 2 wheel dump wagon? This mower comes with ZT2800 Hyros.



Thanks!