1572 vs 1772 Radiator

[FrankF3]

Originally Posted by Oak

Frank, I dont think any of my diesels have the extension. I have not mowed with any of my diesel machines either. When do yours overheat?

If I am using it over 1/4 throttle, no problem. If I stop what I am doing, to pick up yard debris within 5 minutes, the temp gauge is hovering at or over the 230 degree mark. Otherwise, it sits in the normal operating range. It occurred to me that your diesels did not behave like this, yet both my 782D and 1572 with the shields did BUT not my 1772 which did not have the shield.


Temp.JPG

[FrankF3]

If I have a chance, I may pull the shield off of the 1572 and see if it behave the same way.

[CubDieselFan]

Originally Posted by CubDieselFan

Does your 1572 and 782D have the insulation on the hose that goes across the top of the engine? My 1572 had a overheating issues years ago and I noticed when it started, the insulation had fallen at around that time. I put foil tape on it and was cool as a could be. I noticed Todd’s has insulation.

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[FrankF3]

Originally Posted by CubDieselFan

Ten characters

Yes, the insulation is all still there and intact. I took care in replacing the upper hose years ago and not have the insulation break apart. A friend of mine used to work at a ski shop and was always replacing the grips on the ski poles. He told me the secret of getting the old one off and the new grip on was rubbing alcohol. A little squirt of it inside the grip on on the pole by pulling the grip away and working it around and it would slide right off. Although cutting it off may be easier, putting it back on with the alcohol in there let it slide right on and then when evaporated would allow it to really grip on. I've tried WD40 and other lubes but the parts move from the oil afterwards.

[FrankF3]

I finally got more time to check out the 1572. I took the fan extension off from around the fan blade, hoping this would help keep it cool. I started it up from a cold state, let it run for an idle for a min or so, then ran it at 1/2 throttle for about 5 minutes till it was warmed up. At this point the top tank of the radiator was hot all the way across and the temp gauge was not at the bottom most mark, but at the second mark. I then gradually brought the rpm down until it was at an idle and closed the hood. Within 90 seconds, the temp gauge was at the 230~ mark, just like it always has done. When I opened the hood, the temp did drop a little - not much, but I increased the speed back up to mid throttle and the temp dropped back to about 12:00 o'clock after a minute. this is how it's run since it was brand new, so I figured that was normal operation behavior for the beast. But since I now have the 1772 and asked the guys here about this, I think it's running wrong. I did notice when the temp was at 230~ and I increase the rpm to cool it down, that the air after it passed over the radiator was not hot but luke-warm. I have replaced the thermostat at least a couple times in this. Maybe what is in there is bad and time for another. Like they say third time's the charm. Taking the cap off of the radiator, what tubes I can see, have no crusties or build up blocking the tubes. Ideas?

[FrankF3]

I finally got the new thermostat that came in last week installed yesterday. I was surprised to see the difference in the stats. The new one looks like any old thermostat you would put in your car. The old one, had an adjusting nut at the top of the yoke. Not that I'm going to use it again, but I wonder if you can adjust it for a lower temp? It looks like the nut has some sort of locking compound on it.

ThermA.jpg ThermB.jpg

The new thermostat works differently than the old. Starting up and idling as before, the gauge gradually rises in temp. I can feel the upper tank get hot. The gauge, even when totally idling never goes over 230~. Hotter than I like it but better than before.

[Oak]

Frank, that still doesn't work like any of mine.

On my 1772 FEL tractor I wanted different gauges but I couldn't figure out how to do the temp sensor. I looked at my Steiner diesel and noticed that it had a different thermostat cover (gooseneck). Then I see that the 1782 & 2182's use the same one as my Steiner. This puts the temp sensor in the actual water flow and not on the front left of the head. I left the old sensor in place and mounted the old temp gauge under the hood just to make sure they both read the same and they do. Here is a pic of the gooseneck that I got from Rich Patton and all the Kubota parts used.

DSCN1049.jpg DSCN1065.jpg DSCN1068.jpg

That still scares me why it runs hot. I wonder if you removed the radiator and took it to a shop to have it cleaned/flushed. IDK, maybe that's just a BS service.

[FrankF3]

Oak, you have a point here. When I called my dealer to get the thermostat and gasket, I told him about this problem. He said some guys have an overheating problem because of the antifreeze. He said if you have a small leak and keep adding concentrated anti-freeze and not 50/50 premix, you get a more concentrated and thicker solution than you are supposed to have. He said these engines are sensitive to thicker antifreeze solutions. So my next plan is to get the radiator flushed to see if it flows ok and to replace the antifreeze with a new 50/50 mix.

[FrankF3]

It just occurred to me and I hate to say it, would a blown head gasket behave like this?

[CubDieselFan]

Anything new to report on this issue?