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7040 hot under load

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Blustery Knoll Farm View Drop Down
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    Posted: 24 Jun 2019 at 4:22pm
I bought a 7040 last fall. Over the winter I changed the water pump, coolant, and fixed a few leaks in the oil cooler. It does great on light loads, or when the weather is cold. Above 60°, the temperature creeps up under heavy load.

Where should I be looking for the solution? Today I did a little data collection with an infrared thermometer. When the temp gauge read 200, I got 198° on the thermostat housing, and 170° on the water pump inlet from the lower radiator hose. How much temperature differential should I be seeing from top to bottom on the radiator?
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MACK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2019 at 9:17pm
15 to 20 degrees on radiator. Don't check temp. on hoses, they will lie to you. About the age to have radiator cleaned inside and out.     MACK
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Boss Man Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2019 at 9:22pm
I would start by cleaning the radiator fins out. Sounds like the heat isn't transferring like it should. 

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DSeries4 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2019 at 9:28pm
I would get the rad boiled out.  Check the water pump for excessive play and make sure the belts are tight, make sure there is foam around the rad.  Did you change the thermostats?  Wouldn`t hurt to do that either.
'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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Post Options Post Options   Thanks (0) Thanks(0)   Quote jiminnd Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2019 at 9:41pm
I think they have 2 thermostats, might be one bad, change them both.
1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner)
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Blustery Knoll Farm View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Blustery Knoll Farm Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2019 at 8:47am
I have not touched the thermostats.

Where is the foam supposed to be around the radiator? I don't see any.
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2019 at 9:07am
Top.....sides.....lower front......sides of the air cleaner floor. when the hoods are in place the only air that can get to the radiator is thru the GRILLE screen.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2019 at 9:08am
Foam goes on both sides and across the top of the radiator.  Anywhere you can get it, it seals off the hot air from just being sucked back around the radiator, or another way to think of it, forces the air that goes through the radiator to come from the front of the tractor through the grill.  Makes a huge difference.  Start there, it's cheap, easy, and needs to be done no matter if your radiator itself needs cleaned or replaced.
 
On the other hand, if you have the time, might as well take the rad out and get it cleaned inside, then put it together and put the foam in.
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wekracer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wekracer Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2019 at 10:07am
We had the radiator rodded on the 8050 about 5 years ago and put new foam in at that time. It made a huge difference. Good luck
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2019 at 8:21pm
Have the radiator rodded and buy the foam kit. Clean every where the foam goes and glue in place with that 3M yellow stuff.

Edited by Lonn - 25 Jun 2019 at 8:21pm
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