Get oil out of hydrostatic unit.

[Nuclear]

Been trying to change the oil in a sealed Hustler Raptor hydrostatic transmission. I'm using a oil suction pump but can only get 22 oz out. I'm using a 1/4 hose but can't seem to get it pushed lower into the unit. I'm going thru the fill port.
Any ideas on what else I can try?
2017 raptor 52 inc

 

[Auto Doc's]

Does this have a right and left drive motor unit?

Please provide the model number information on your machine manufacturer label.

Trying to suction out of the fill port will only allow a limited amount of fluid removal.

if this had a spin on filter with a guard over it (under the bottom behind the wheel assemblies), removing the filter drains the fluid from the case.