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Butch1581 
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Joined: 07 Mar 2021
Location: Hortonville, WI
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 Topic: D14 Thermostat and Operating Temps
Posted: 19 May 2021 at 9:09am |
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I replaced the non functional mechanical thermostat with a new Bosch mechanical thermostat. Thermostat shows the tractor operating at 150-160 pretty consistently now. I know the manual says it should operate between 170 and 220. I'm assuming there must be a 160 degree thermostat installed, but I have not opened it up yet. Is 160 degree thermostat typical on these? Should I swap out to a 180 degree?
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DrAllis
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Joined: 12 Sep 2009
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Posted: 19 May 2021 at 10:02am |
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You'll be fine. Leave it alone.
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 19 May 2021 at 11:51am |
I'm with teh doc... leave well enough alone !!! What you do NOT want to do is replace it with a 180, only to find out the '180' is STILL on the bench, next to the phone you just HAD to answer......
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Butch1581
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Posted: 20 May 2021 at 7:03am |
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Alright. If it's not a big deal I'll leave it, but thr manual states that it must be at least 170 to avoid condensation build up. What would be the harm in changing to a 180?
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DrAllis
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Posted: 20 May 2021 at 7:15am |
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Nothing. You don't realize how many THOUSANDS of D-17 gas tractors had 160 degree stats in them.
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john(MI)
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Location: SE MI
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Posted: 20 May 2021 at 10:03am |
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How do you know it's 160 degrees? Gage? Maybe a 60 year old gauge is weak and not reading correct? If it ain't broke, don't try to fix it.
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D14, D17, 5020, 612H, CASE 446
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Butch1581
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Posted: 20 May 2021 at 11:03am |
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I don't know for a fact it's 160 degree thermostat but I just installed a brand new Bosch temp gauge. My initial thought was that maybe whatever thermostat was in there was stuck open.
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DSeries4
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Location: Ontario, Canada
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Posted: 20 May 2021 at 10:23pm |
If the tractor does not get used much or gets used for light duty work, it's good to put a 180 degree Tstat in it so it runs a but warmer. That is what I put in mine.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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DiyDave
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Location: Gambrills, MD
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Posted: 21 May 2021 at 4:40am |
My suggestion would be to use an IR thermometer on the block, while the motor is hot. The 149 ci block also had 2 different sensor locations, one up front, at the t-stat, and one near the manifold, that was very close to the exhaust manifold heat bleed. temps at the 2 locations could vary 20-30 degrees... 
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Les Kerf
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Location: Idaho
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Posted: 21 May 2021 at 9:08am |
 DSeries4 wrote:
If the tractor does not get used much or gets used for light duty work, it's good to put a 180 degree Tstat in it so it runs a but warmer. That is what I put in mine.
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I put a 180 along with a brand-new temperature gauge in my Model C last summer and frankly I wish I had gone to a 195 (it had no thermostat in it whatsoever when I opened it up). I simply do not use it hard enough for a 195 to ever be a problem here in the moderate climate of northern Idaho. If I lived in a warmer climate and used it for its original design purpose of bona-fide farming pulling a plow, etc. at heavy throttle settings, then a 160 would probably be about ideal.
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Butch1581
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Posted: 21 May 2021 at 10:01am |
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Thanks for the replies. I live in Wisconsin and the D14 has a loader on it. We mainly use it in winter/cooler months and use it for moving logs to the sawmill and moving snow and dirt. No field work for sure. Does that change anyone's opinion? I will shoot the block with an IR this weekend. Great idea!
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