Electric over hydraulic valve control

It's just a home machine being run on the farm. As it is now the controls freeze up due to their inherent morse cable design. When I'm out pushing snow off my driveway after about half an hour the cables freeze up due to frozen moisture and then it becomes somewhat useless until I pull it into the shop and warm it up for a couple hours. If the control was to go full on all that would happen is it would go full travel to the end of the cylinder stroke and hit the hydraulic release pressure, at which time I could just shut down the machine or simply lift the controls lockout to disable it (I will retain that feature in this changeover). I'm only controlling the lift arms and the bucket with this, the drive will remain mechanical, as that system works great. I don't run this machine around any other people or have anyone in the direct vicinity of its range of motion.