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Harry Ferguson Tractors Discussion Forum
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T0-20 cooling

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Greg Cristine

07-26-2005 03:58:43




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Where is the thermastat in the T0-20 Tractor located? What other circumstances could cause it to over heat. Thank you, Greg




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azjohn

07-30-2005 20:17:37




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 Re: T0-20 cooling in reply to Greg Cristine, 07-26-2005 03:58:43  
Greg I just got done going through this with my to-30. I flushed out the radiator, engine, pulled the water pump. nothing helped. I took the radiator to the repair shop. The man said that over half of the core was plugged up. He rotted out the radiator. I just got done about 2 hours ago putting the to-30 back together. WOW I can seee the water moving in the radiator. I do mean moving. Before the water stood still. This was one reason I thought the pump was bad. Moral of the story. Just because water goes through the radiator with a garden hose does not mean the radiator isn't plug up. Good Luck

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Greg Cristine

07-31-2005 04:40:18




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 Re: T0-20 cooling in reply to azjohn, 07-30-2005 20:17:37  
azjohn, thanks for taking the time to reply. I think I will do the same. Greg



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gshadel

07-27-2005 09:40:43




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 Re: T0-20 cooling in reply to Greg Cristine, 07-26-2005 03:58:43  
Greg, #1 reason for overheating of fouled radiator. Both the inside and outside. Flush the inside with a reputable flush. Flush the outside radiator fins both directions with compressed air, then water hose. I have used a small ~1000 psi powerwash on mine too. You will be amazed how much debris is hung-up in those fins that you don't see until you start shooting water or air thru it.
A clean radiator does a great job keeping your TO cool no matter how hard you are working it.

#2 reason, bad thermo. Pull the top hose, take it out, heat it up in a pan od water and make sure it starts to open @ ~ 180 F. Should be full open ~ 195 F. Thermos are cheap, if it looks shaky, get a new one.
A word of warning - that thermo is flow directional. If you install it backwards, your engine will overheat in about 5 minutes. Look for a direction of flow arrow or "RAD" stamped on the side of the thermo so you install it right. Coolant flows out the top of the engine, thru the thermo, into the radiator.

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Greg Cristine

07-28-2005 09:46:42




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 Re: T0-20 cooling in reply to gshadel, 07-27-2005 09:40:43  
gshadel, Thanks for the info. In what direction does the thermo get put in the hose? Does the "rad" mean "this side to radiator? Thanks again,Greg



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gshadel

07-29-2005 04:18:19




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 Re: T0-20 cooling in reply to Greg Cristine, 07-28-2005 09:46:42  
You got it Greg, rad end faces radiator.
Some recent posts on thermos.... with pictures above, might help too.

If after cleaning radiator and checking thermo, you still have trouble, check your radiator cap to make sure it's holding correct pressure. My manual says TO-20's had 3# caps and TO-30's had 7# caps. Not knowing any better at the time, I installed a 7# cap on my TO-20 a few years back.... hasn't given me any trouble, so I'm leaving it that way.
If you continue to run hot might want to check your timing (easy with a timing light and a 12V source), and double check your "power" mix screw (the big one) on your carb. Both of those can make your engine run hot if way out of wack.

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Greg Cristine

07-29-2005 16:04:08




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 Re: T0-20 cooling in reply to gshadel, 07-29-2005 04:18:19  

gshadel, Thanks for your time. It is greatly appreciated. I have the thermo in and the correct cap, the engine is still overheating and the coolant is forced from the radiator. I ran it with a brush hog for @1 hr and had to add two gallons of water. Any Ideas Thank you, Greg



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Dan S (NY)

07-26-2005 04:57:56




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 Re: T0-20 cooling in reply to Greg Cristine, 07-26-2005 03:58:43  
The thermostat is in the upper radiator hose. Overheating can be caused by stuck thermostat, plugged up radiator (inside and out), water pump not pumping (loose fan belt may cause this to) or a plugged up engine block. When I took apart my TO20 engine you wouldn't believe how much sand I found in the block! Also make sure your radiator hoses aren't coming apart on the inside and plugging up.

Dan

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