If it was a county truck it would use one hose to operate a roll type tailgate spreader and the other is a return line to reservoir which passes thru a filter. If there are three hoses at the rear it would be to operate a tailgate slip in box spreader that has a motor to run the auger and another to run the rotary slinger. The third is the common return line. Somewhere on the truck you'd find a flow control valve to regulate the speed of the motor(s). As your in TX it is possible that the equipment might have been a conveyor for shoulder work or even a hydraulic tool circuit. If you get ice then it is likely for a spreader.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain