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I use my Dura-trac with the loader all the time. When the temps get below the freezing point it can take quite a while for the tractor to start moving and the power steering to function. I have two of these tractors and they both do this. The hydro filters have been changed and the oil replaced with Hy-tran fluid. My feeling is this fluid is getting is too thick and would like to change to something lighter like automatic transmission fluid. Any suggestion as to which automatic trans fluid would be the best to use?

Thanks for your help.
 

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I didn't do it! Unless you have paperwork
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I normally will let the machines run a good 20 minutes when its under freezing before I start moving them or the hydraulics, that's usually enough to warm the fluid.
Machines and particularly hydraulics are especially finicky about fluid. The manufacturers are making with such tight tolerances weight of oil is crucial. I would not waver from what is supposed to be used. Let it warm up if using in freezing temps.
 

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Most of the hydro's that call for ATF can use Dexron III. Most all hydro units can use Dexron.
 

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Point a forced air heater at the back end and let it run for a 10-15 min to warm the case and oil up. Makes a big difference and a lot easier on the machine. They start a whole lot easier too this way.
 
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Regular dexron-mercon or dexron 111 meets all the spec's.
 
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That good to know. On my JD 1050, the hydraulics are slow to go until I give it a good 30 minutes to warm up.
 

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After asking for help it seems like the right thing to do is update this inquiry. Had time this afternoon to change the Hydro fluid. Service manual stated 8 quarts but after draining,running it briefly in forward and reverse 6 quarts is all I could get out. Refilled it with Dexron III and parked it outside for a few hours. Normally it would require a warm up period but not this time. The power steering worked right off the bat and no noisy relief valve. Drove off like it was summer time. :D Will be changing the hydro oil and filter in the spring.

I will update this tomorrow after it has set outside all night. Suppose to be windy and 29 degrees.
 

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Didn't get that cold last night, it was 34degs. when I started it. First thing I noticed was the engine turned over faster and started right up. Backed out of the unheated shed right away and the power steering was working also. So far so good. It stayed the same temp all day and after setting out in the cold wind for the afternoon it cranked over good. After starting it moved OK but the power steering took a couple of minutes to come on line. All an all I'm very pleased with the way the Dexron III is working. Especially the way the engine turns over when cold. Had the the 2 speed differential in neutral and the brake pedal depressed. Also the loader pump was not engaged which is normal procedure in cold weather. If this keeps up the other GTX-20 will get the same treatment.
 

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We're both in cold climates. My QT manuals have a nice temperature chart for the oil and hydro fluid. For up here it says ATF, so that is what I use in mine. It also says there is no need to change it back in the spring. Paul
 
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Discussion Starter · #15 ·
We're both in cold climates. My QT manuals have a nice temperature chart for the oil and hydro fluid. For up here it says ATF, so that is what I use in mine. It also says there is no need to change it back in the spring. Paul
That's good to know. My manual as usual lists different oils and none are in simple English nor brands I've heard of before. I think they do that so you have to go to the dealer for help.
 
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