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Darned Old Tractor!

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Allan In NE

10-10-2006 01:39:13




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Daggum it!

There is something about old red tractors that just drives me nuts if something doesn't work just exactly like it is supposed to.

Heater on the '75 1066..... .

It blows "warm" but not "hot" to the touch. So, I'm going to back flush the core and see if I can get any crud out of the darned thing.

Now, can those hoses be installed backwards? The heater has a "heat control" valve and wondered if it makes any difference which way the flow should be?

The rear end was overhauled in this tractor and the cab has been off at one time. Just wondering if someone could have hooked the hoses up backwards maybe and this might be impeding the flow?

Allan

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r4etired

10-10-2006 15:43:20




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Allen You are right most likely the control valve or a partially plugged coil, The coil itself doesn't care which direction the coolant flows,as the connections are straight in and out on a horizontal coil. If the coil is installed vertical then the lowest inlet must be the supply port, The control valve is a disc type valve, a quarter turn from full open to closed,if the operator linkage is bent or wore it can cause the valve never to fully open. Most coils of that size require approx 1.6 gpm of flow to heat at max, thats assuming engine coolant of 180 deg and 170 at the coil and a 10 to 12 degree drop across the coil.You could pull the hose on the return and see how long it takes to fill a gallon can with engine at working rpm. On my own tractor the coil was partially plugged so I just mounted a 1.5 gpm 12 volt Sure flow pump in the return hose, put a toggle switch on the dash and control it manually

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Janicholson

10-10-2006 12:23:59




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Dear Allen,
The only thing I can add to the sage advice below is that it is likely that air gets trapped in the core/lines at their highest point. Sometimes it is gasses that are driven out of the coolant. This "vaporlock" is hard to remove. I like to put a pressure tester on the rad. then loosen the highest point on the hose to core connection, allowing the air to escape. The best is to have a vent soldered into the core at its highest point that can be opened easily with a little valve. Then when the unit is up to temp, venting uses the internal system pressure to push out the air. I hope I helped some. JimN

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Marv

10-10-2006 08:21:36




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Allen, I had a 1066 and never could get sufficient heat out of the darn thing. I figured a diesel engine runs cooler than a gas engine. Marv



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Allan In NE

10-10-2006 08:34:03




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 Re: Darned Old Tractor! in reply to Marv, 10-10-2006 08:21:36  
Yes Sir, I know. Takes 'em a long time to come up to temp.

But, even after the tempreature is up to midrange on the gauge, I should be getting a hot core and not just merely lukewarm air.

The heater will run ya outta there given enough time, but it still is just "warm to the touch" if I hold my hand in front of the ducts. That thing ought to be running "hot".

Dunno, maybe I'm just too darned picky. :>(

Allan

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Michael Sheik

10-10-2006 06:45:24




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
The control knob on my 1066 doesn't work either. Not a big issue with me as it stays under a blanket for the winter although it does bug me when something doesn't work.



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Rich Va

10-10-2006 05:09:26




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
What no pictures! We need pictures. Was the tractor up to normal operating temperature when you tried the heater?



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Allan In NE

10-10-2006 08:44:14




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 Re: Darned Old Tractor! in reply to Rich Va, 10-10-2006 05:09:26  
Yeah Darnit! Must be slippin' in my old age. :>)

Oh yeah, it was up to temp and seems like plenty of air flow; just not getting the heat I think shold be gettin'.

Darned core and evaporator could be plugged up also, but I really don't want to pull that roof cover until I'm ready to tackle the air conditioning too.

The condenser fans must have gone south on the provious owner, because the A/C has been disconnected and a "By-Cool" unit installed in the roof. That joker is coming back out of there for sure. IH just didn't use water coolers. :>)

Allan

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IaGary

10-10-2006 04:11:42




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Geeeees Allan you puttinin overtime today or what?

Does your boss allow overtime?

Your up awfully early this mornin.

The control valve should be on the pressure side not the return in my estimation.

Gary



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Hugh MacKay

10-10-2006 16:04:51




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 Re: Darned Old Tractor! in reply to IaGary, 10-10-2006 04:11:42  
Gary: Don't be too hard on him, he is the only one I can rely on being around here every morning at 5 am EDT. My calculations call that 3 am in western Nebraska. Without Allan YT would be a lonely spot most mornings. We warm YT up for the rest of you every morning.

I guess like Allan, I doubt if I've ever averaged more than 6 hours sleep a night in my entire life. Folks like Allan and I just enjoy life too much to let it slip by in our sleep. By the time we are 80, we will have experienced 20% more living than the rest of you.

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Allan In NE

10-10-2006 07:30:09




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 Re: Darned Old Tractor! in reply to IaGary, 10-10-2006 04:11:42  
Hi Gary,

Aw, I've never been able to sleep much over four or five hours so I'm usually up between 2 or 3. :>(

Hugh was right; I probably wasn't awake yet. 'Course the valve would go on the input side. Duh on me. :>(

Thanks,

Allan



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Don L C

10-10-2006 02:39:26




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Allen ---

The hot water comming from engine should enter the bottom of the heater core..... that way it is full of water not air.....if the water enters the top, it simply drops to the bottom and out ....core full of air = no heat..... .Don



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Hugh MacKay

10-10-2006 02:14:32




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Allan: What in the name of blazes are you doin up at this hour. Your post is not completely fresh, and by my figuring it's 3 am in Ne.

Cant tell you about the hose item, never had any problems with them. I never thought the heat control switch or dial was a device to get excited about. Quite cheap I thought. All I could ever find was one setting, full heat, and if I didn't want that it was shut the taps off down at the engine. Most of summer the taps were shut off, spring and fall you went with windows open and winter you were marginally comfortable.

But then the whole design of tractor cab heaters was wrong back in those days. Damn hard to blow heat down. I always figured the heater should have been a the floor and a/c in the roof. I expect the heat valve or heater core, could be your problem. It also probably has to circulate the right direction.

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Patrick Martin

10-10-2006 02:06:47




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 Re: Darned Old Tractor! in reply to Allan In NE, 10-10-2006 01:39:13  
Hey bud :)
Did you check your thermostat? If the radiator is a very efficient one and cools quick then your thermostat is sticking open. I don't know when the last time you changed it but you need to look into that. Make sure you have the one with the correct temperature rating too.

There's not much to a heater. Two small diameter hoses that plug into the inlet and outlet side of the water pump (not the radiator hoses), a heater core, an electric fan, and a box to house the works with doors and flappers and ducts.

If the heater is blowing at least warm then coolant is getting to the core. If the core was plugged up then it would overheat. Best thing to do is to check the temp of each hose while running and see if one is significantly hotter than the other and the cooler one feels like it doesn't have much water in it. It should be pretty squishy if it's not getting flow through.

I bet it's your thermostat. Be sure to use plently of coolant when you refil it. Coolant contains ethelyne glycol to prevent the water from freezing but it also contains a oil which is a rust inhibitor that protects your water passages and keeps your thermostat free and operational from corrosion.

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Allan In NE

10-10-2006 07:37:11




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 Re: Darned Old Tractor! in reply to Patrick Martin, 10-10-2006 02:06:47  
Yeah, didn't make myself clear (as usual).

Engine and temp come right up to normal. Problem is somewhere in that darned core or the valve.

I'm gonna backflush the silly thing; I've had pretty good luck doing that with a garden hose. Three or four times in both directions and it usually cleans 'em right out.

Was just wonderin' about that valve and wheather it could be "plumbed" wrong. :>)

Allan

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Patrick Martin

10-10-2006 02:10:23




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 Re: Darned Old Tractor! in reply to Patrick Martin, 10-10-2006 02:06:47  
You could be flowing from the wrong direction but it shouldn't make that much difference however. The same temperature water will be entering the core no matter if it's the inlet or outlet. If you have a valve like you say then flowing backwards can affect that adversley.



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