On my Kubota M6800, which is what I most often use in the winter, the operators manual calls for a 20 minute warm up period in temps below 5F (I think) to get the hydraulic fluid warmed up. I always use the mfg block heater to warm up the engine real good and then I use a starter/charger to boost the electrical system. The engine starts like it's summertime that way. But if I push the warm up time on the hydraulics sometimes they'll be a little sluggish until about 20 min goes by. I'm talking 10 below zero or so. That's just the way it is in spite of that Super UDT fluid being almost as thin as water. You should consult the operators manual to see what the mfg has to say about engine/hyd warmup procedures. For example, the smaller JD tractors are supposed to be run at a mnimum of 1200 rpm for warm up times taking more that just a few minutes to insure proper engine lubrication.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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