Hi I need help with my 1620 cub cadet can anyone tell me how to bleed or purge air out of hydrostatic unit?Thanks

Good Luck.

I'm not familiar with the cub cadet system, but every hydro I've worked on has recommended filling the hydraulic oil reservoir and turning the engine over for fifteen or twenty seconds to circulate the oil and charge the system. On gas units remove the spark plug and crank the starter. On diesels disconnect the fuel shutoff solenoid and crank the starter. Make sure you recheck the oil reservoir afterwards and fill to the proper level.

Good Luck!