pressure and flow rate of 919 hydraulics for tille

[bostev]

I would like to put a sears snowthrower on my fathers 919 using the hydraulics for the tiller but I need to know the press. and the flow rate to figure the size of motor I need (I dont have the tiller ) or I need to know what size motor is on the tiller. I would also like to put a flow control on to regulate the speed (I'm not sure how fast the 18" dia. x 36" long single-stage thrower is supposed to turn. THANKS