I have owned two exmark lazer 60 mowers for the past 8 years and the only problems I have had is the hydro pums keep failing due to the bearing cage from the chinese parts that the hydraulc pumps are made from.I am on my third one now and the second one hailed out within 5 months wich exmark coverd but in the mean time my whole hydraulic system is being contaminated with metal particles from a seven dollar chinese bearing.with 3 failed thrust bearings at 420.00 a pop for pumps has any one else experianced this? I have contacted exmark but have not heard back in the last 4 attempts.fluid and filter change every season am I missing something?