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Old 12-31-2016, 09:22 AM   #1
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Overheating

I have a 1995 Beaver Patriot, Spartan Chassis, Cummins 8.3, Side mounted radiator. Over the summer when the it gets above 90 deg F and driving over 60 mph the engine temperature and transmission temperature will both rise. Any slight hill will cause over heating. That requires pulling off the road for a few minutes until they both cool down. The hydraulic fan is running. I believe that there was once a cover between the bottom of the side vent and the radiator that is missing. I did wash the exterior of the radiator to remove all loose dirt, but that did not help. Does anyone have any ideas what the issues is? Thanks
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Old 12-31-2016, 09:33 AM   #2
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Originally Posted by Harley39b View Post
I have a 1995 Beaver Patriot, Spartan Chassis, Cummins 8.3, Side mounted radiator. Over the summer when the it gets above 90 deg F and driving over 60 mph the engine temperature and transmission temperature will both rise. Any slight hill will cause over heating. That requires pulling off the road for a few minutes until they both cool down. The hydraulic fan is running. I believe that there was once a cover between the bottom of the side vent and the radiator that is missing. I did wash the exterior of the radiator to remove all loose dirt, but that did not help. Does anyone have any ideas what the issues is? Thanks
With the year of your Coach in mind, I am going to say the Radiator and the CAC needs to be pulled and cleaned, inspected, and tested for leaks while out. Here are example's of some after a good/repeated washing while in place.....

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Old 12-31-2016, 10:08 AM   #3
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Can you hear the fan come on when it gets to the high temps. I started have the same problem could not here my fan come on like it use to from the readings on my Silverleaf. My high temps went from 204degs last year to 210degs and the trans would also go up. When the fan controller goes bad it should go to high but mine did not.
So I went down to Source Engineering and had the wax valve installed, now my high temps run of 192-194deg big difference plus I can hear the fan come on now.
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Old 12-31-2016, 10:13 AM   #4
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Can you hear the fan come on when it gets to the high temps. I started have the same problem could not here my fan come on like it use to from the readings on my Silverleaf. My high temps went from 204degs last year to 210degs and the trans would also go up. When the fan controller goes bad it should go to high but mine did not.
So I went down to Source Engineering and had the wax valve installed, now my high temps run of 192-194deg big difference plus I can hear the fan come on now.
2 stroker
Did the OP's vintage year have these controls? or just a direct drive hydraulic fan? Wondering....
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Old 12-31-2016, 10:13 AM   #5
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Harley....
There are 2 or 3 radiator type units stacked in there that serve to cool various power plant related fluids. They get dirty, plugged up, with leaves and twigs crammed in between.
It needs disassembly and thorough cleaning with steam and light pressure. (Excessive high pressure can damage the cooling vanes.).
I had this problem a few years ago, overheating pulling grades in Idaho heading for Salt Lake. Went to Freightliner of Utah and they cleaned an astounding mess out of there. Since that time my running temp has been rock steady- hot, cold, uphill, downhill, fast, slow. I'm sure you'll be fine.


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Old 12-31-2016, 05:54 PM   #6
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Did the OP's vintage year have these controls? or just a direct drive hydraulic fan? Wondering....
Don't know, maybe they did have a direct drive and if that is the case the radiator may need to be cleaned.
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Old 01-09-2017, 08:10 PM   #7
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Try replacing radiator cap
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