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860 running warm?

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Rick Wages

07-25-2005 18:52:54




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new rebuilt 860 temp gauge says 220 after 1hr heavy bush hogging in 100 degree weather is this normal? tractor did not boil over and did not start hard after shut off. could gauge be bad?




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Pernell

07-26-2005 19:50:18




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 Re: 860 running warm? in reply to Rick Wages, 07-25-2005 18:52:54  
When I was younger, my dad's 850 did the same thing, but it had a baffle in the top tank that came loose and was laying over a lot of the cores. When the radiator was removed you could shake it and hear it moving around, so he had the top tank removed and threw the thing away before soldering it back together.



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Dean

07-26-2005 06:04:56




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 Re: 860 running warm? in reply to Rick Wages, 07-25-2005 18:52:54  
I would suspect your radiator. If original, it is nearly 50 years old and has probably been repaired many times. Radiator shops will often close off leaking tubes. If this has been done often enough, your radiator may be marginal for heavy work in hot weather. Alternatively, if your radiator has been replaced, and replaced with the commonly available replacement radiators with automotive type cores, it will be very prone to clogging with dirt, dust, etc., especially when mowing. You will need a fine screen in front of it to prevent this, and the screen will require frequent cleaning to allow adequate air flow for cooling in hot weather.

My 55 860 with original radiator, 6 blade fan, and proper shroud and thermostat will eventually get into the red when working hard in hot weather, e.g., above 85. I'm not sure that I could work it hard for any length of time in 100 degree weather.

Dean

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Hurley J. D.

07-26-2005 10:09:28




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 Re: 860 running warm? in reply to Dean, 07-26-2005 06:04:56  
Where did you find a 6-blade fan. All I have seen for this tractor is a 3-blade.



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Keith-OR

07-26-2005 13:29:34




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 Re: 860 running warm? in reply to Hurley J. D., 07-26-2005 10:09:28  
Some of the older NH swathers use an industrial Ford 172 ci motor, which has the six bladed fan.You should beable to get fan from NH dealer.I have the six blade fan on my 860, maintains normal temp even when it is 100 degrees out and working hard.I pull a Howard 60" tiller with my 860.. Keith



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Dean

07-26-2005 12:13:05




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 Re: 860 running warm? in reply to Hurley J. D., 07-26-2005 10:09:28  
The fan was on the tractor when I bought it. I believe that it is an industrial fan. Now that I think about it, I believe that it might be a 5-blade. It moves lots of air and makes lots of noise.

Dean



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Dean

07-27-2005 05:36:35




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 Re: 860 running warm? in reply to Dean, 07-26-2005 12:13:05  
Checked it last night: It is, indeed, a 6-blade.

Dean



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DaveH(NY)

07-26-2005 05:08:55




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 Re: 860 running warm? in reply to Rick Wages, 07-25-2005 18:52:54  
Check the fan itself, I had an overheating problem with my 860 and ended up changing radiator,waterpump,thermostat, hoses, gauge and coolant to no avail, I had the tractor idleing and could feel almost no air blowing out from the engine area,changed the fan and now it runs on the hottest days just into the green on the gauge. On inspection of the original fan I found that someone farmerized the fan by pounding the blades flat so I pulled no air.

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Larry NCKS

07-25-2005 20:25:13




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 Re: 860 running warm? in reply to Rick Wages, 07-25-2005 18:52:54  
Use a cooking thermometer or something designed to read actual radiator temps. Be very careful when removing cap though. This could scald you!

You're problem could be anything from gauge to thermostat to water pump to clogged radiator (either inside or out) to timing to fuel. Good luck!



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Feron

07-25-2005 19:16:18




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 Re: 860 running warm? in reply to Rick Wages, 07-25-2005 18:52:54  
You could have a bad gauge. Or a stuck thermostat. 220 is not normal. I would try another gauge. Would not run if it's running that hot until you figure it out. You could be running lean on your carb adjustment that will cause some heat



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