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John Deere Tractors Discussion Forum
Show Parts for Model:

JD 2940 heating problem

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lemroy

10-31-2012 19:37:04
209.33.77.201



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On my 2940 I had the radiator rodded out, put in 2 new thermostats, I had the water pump checked by a mech,had the radiator cap tested and it was bad. I went to Deere and got a new cap and it still pumps water out the overflow pipe and gets hot. What else should I look for. Thanks, Roy




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ihman73

11-01-2012 19:20:40
38.104.162.142



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 Re: JD 2940 heating problem in reply to lemroy, 10-31-2012 19:37:04  
If you have an IR temp gun check the temperature on both sides of the thermostat housing to make sure the thermostats are opening. Also find out what the temp is when the gauge shows hot if it isn't over 190 or so it could be a gauge problem. Our 2950 also will push coolant down to about midway down in the top tank.



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lemroy

11-02-2012 18:58:11
209.33.77.201



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 Re: JD 2940 heating problem in reply to ihman73, 11-01-2012 19:20:40  
Thanks for your reply. I will check the temp on both sides of the thermostat. I put two new thermostats in. Roy



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David S.

11-01-2012 14:55:22
68.230.198.23



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 Re: JD 2940 heating problem in reply to lemroy, 10-31-2012 19:37:04  
To add from the other post, when i change coolant on my 2940 if i fill the radiator it will push out about 1/2 gal of coolant until it gets about mid level in the top portion of the radiator when cold but it does not overheat. i assume your water temp gage is going into the red.



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lemroy

11-01-2012 18:54:44
209.33.77.201



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 Re: JD 2940 heating problem in reply to David S., 11-01-2012 14:55:22  
Yes. the water temp goes into the red, but a lot of water keeps going out the overflow. Roy



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David S.

11-01-2012 13:57:41
68.230.198.23



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 Re: JD 2940 heating problem in reply to lemroy, 10-31-2012 19:37:04  
Have you checked the impeller on the waterpump, known for getting loose inside housing or wearing out. Also I believe you can get test strips to test coolant for combustion gases.



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lemroy

11-01-2012 18:57:00
209.33.77.201



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 Re: JD 2940 heating problem in reply to David S., 11-01-2012 13:57:41  
Yes, I had a mech check the impeller and he said it was ok. Roy



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Tx Jim

11-01-2012 03:57:31
67.142.163.20



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 Re: JD 2940 heating problem in reply to JimEvans, 10-31-2012 19:37:04  
lemroy

Either new radiator cap is faulty or compression is getting into cooling system. I'd suggest removing rad. cap,starting engine and looking for bubbles in coolant.



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lemroy

11-01-2012 19:01:07
209.33.77.201



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 Re: JD 2940 heating problem in reply to Tx Jim, 11-01-2012 03:57:31  
Thanks I will try this. I took the tractor to a local shop, not JD. I will see what he suggests. Roy



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buickanddeere

10-31-2012 20:49:44
173.243.43.66



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 Re: JD 2940 heating problem in reply to lemroy, 10-31-2012 19:37:04  
It's still full of lime and calcium because somebody saved money by using tap water. A chemical clean may knock some loose? Is there strong flow from the water pump? Odds are the water pump pulley and alternator pulleys are worn . A new belt or over tightening won't fix the problem either.



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lemroy

11-01-2012 19:02:44
209.33.77.201



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 Re: JD 2940 heating problem in reply to buickanddeere, 10-31-2012 20:49:44  
Yes there is a strong flow from the water pump. Roy



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LarrySTN

10-31-2012 19:44:36
71.54.88.168



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 Re: JD 2940 heating problem in reply to lemroy, 10-31-2012 19:37:04  
have you checked to see if the head gasket is blown. Are air bubbles coming out the top the radiator with the cap off and the engine fairly well warmed up?



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lemroy

10-31-2012 19:49:24
209.33.77.201



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 Re: JD 2940 heating problem in reply to LarrySTN, 10-31-2012 19:44:36  
Thanks for your response. I haven't noticed any bubbles. I will check again. Roy



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