Adding hydraulics to model D

The drawbacks- you will need to charge your battery after working the tractor and running many hours with lights on might drain the batt enough to stall he tractor. The GPM of most ps pumps is on the low side so your implements will raise and lower fairly slowly but the pressure relife is around 1000 psi so you will be able to use smaller cylinders that require less gpm to work than the old low pressure 600 psi systems. Your resivoir should be about 1 gallon so you will need to add an additional resivor on top of the pump's intrgrated resvoir if you use a pump like mine ( I used a plastic one gallon juice jug).

This system runs my old manure front end loader fine (but slowly). It has 2 3" cylinders and i have had over 1000 lbs of concrete bags on the loader (enough to cause the front tires to flatten and make steering VERY difficult) and the hydraulics would lift it while the engine was idling.