2640 over heating.

[Todd1969]

Friend of mine has a 2640 he has installed new radiator water pump,belt ,and thermostat. And still. Stoll over heats. Is this a common problem for these. Tractors that can't be fixed. We have a 2440 that is the same way

 

[centash]

Late timing? Fan belt slipping? Water pump impeller good?
Ben

 

[Tx Jim]

Ditto on checking inj pump timing. Is back of fan belt above "V" in pulley's? It's possible engine compression is getting into cooling system. After engine has not been operating for a while IE it's cool remove radiator cap,start engine then look inside rad neck for air bubbles or install a gauge & look for higher than normal pressure.

 

[buickanddeere]

Boiling over or reading hot on the gauge ? What is the actual true coolant temp in degrees ? 195-210F is not excessive .
Noticed a new belt was mentioned but nothing about replacing the worn out water pump pulley and worn out alternator pulley .crank pulley belt groove can be worn too. Cranking the belt tighter on a worn pulley just causes more problems . Belt alignment is vital too. Sometimes the water pump pulley has to be moved on the shaft . Seen where the alternator had to be shimmed to line up with the crank pulley .

 

[tim s]

A lot of those had a "Plastic" water pump impeller,,they break apart to where the shaft is spinning all alone,,check this out,,my guess is that is your problem,,I have seen it a lot..

 

[Lee B]

No it is not a common symptom, they usually cool themselves well if cooling system is in good working condition. How many hours on these engines? If it's way up there you might be dealing with the inefficiency issue of a worn out tired motor that can't make horsepower anymore, just a lot of heat. It does happen where they don't smoke, start fine within reason, run fine, and sound fine too, but put them to work and the temp gauge goes into the red anyway. First issue is to find out the actual running temperatures. Compression test will be the only solid way to determine if you really need an engine overhaul if the issue really is a worn out engine.

 

[4520BW]

Did you bleed the air out of the system when you refilled the coolant?

 

[buickanddeere]

. For tractors that have not been stripped to the bare rad . The radiator is usually 1/3 plugged with oily mud .
Over advanced injection timing will make them run warm . Anyone been tinkering with the injection pump rack .

 

[johndear720]

my 2640 used to run hot even with a medium load. New radiator, new water pump, stuck pressure washer in the block while water pump was out and washed a bunch of mud out. Prior owner had apparently tried to stop leaking water pump with stop leak. System clean again with new parts it can be worked hard all day in Florida 95 degree 95% humidity days and set on 190 all day. I had a 444 IH that ran hot even with new radiator and water pump. Knocked block core plugs out and block was caked full of mud. Pulled water pump back off and pressure washed block out with the core plugs out also. Ran at the thermostat setting from then on with no more issues. Years and years plus unknown owner/operators and block may be full of gunk.

 

[buickanddeere]

(quoted from post at 00:16:50 11/22/18) my 2640 used to run hot even with a medium load. New radiator, new water pump, stuck pressure washer in the block while water pump was out and washed a bunch of mud out. Prior owner had apparently tried to stop leaking water pump with stop leak. System clean again with new parts it can be worked hard all day in Florida 95 degree 95% humidity days and set on 190 all day. I had a 444 IH that ran hot even with new radiator and water pump. Knocked block core plugs out and block was caked full of mud. Pulled water pump back off and pressure washed block out with the core plugs out also. Ran at the thermostat setting from then on with no more issues. Years and years plus unknown owner/operators and block may be full of gunk.

In the North we don’t often think of that as 50/50 antifreeze has to be used . Unlike the south where a bucket of ditch water can be a candidate for a cooling system.

 

[tim s]

My bet is still on a failed plastic impeller.

 

[K Effective]

Friend of mine has a 2640 [b:dd9dfbda79]he has installed[/b:dd9dfbda79] new radiator [b:dd9dfbda79]water pump[/b:dd9dfbda79],belt ,and thermostat.

I think this may point us to something else.

I am chasing a high temperature reading on my 2355- liquid temp and all surrounding metals shows 190-205F when gauge reads off scale high. Next step is new sender...

 

[Tx Jim]

(quoted from post at 18:52:40 11/22/18)

(quoted from post at 00:16:50 11/22/18)

In the North we don’t often think of that as 50/50 antifreeze has to be used . Unlike the south where a bucket of ditch water can be a candidate for a cooling system.

I hope by South you're referring to South of the Rio Grande river. :lol:

 

[buickanddeere]

(quoted from post at 07:16:14 11/23/18)

(quoted from post at 18:52:40 11/22/18)

(quoted from post at 00:16:50 11/22/18)

In the North we don’t often think of that as 50/50 antifreeze has to be used . Unlike the south where a bucket of ditch water can be a candidate for a cooling system.

I hope by South you're referring to South of the Rio Grande river. :lol:

Ay place in the southern US where hard freezes do not occur.

 

[Tx Jim]

In '83 in N Central Texas it stayed below freezing 295 consecutive hrs. Freezing some lakes/ponds over a foot deep(thick).

 

[buickanddeere]

(quoted from post at 18:47:31 11/23/18)
In '83 in N Central Texas it stayed below freezing 295 consecutive hrs. Freezing some lakes/ponds over a foot deep(thick).

Ash from Mt St Hellen’s sure cooled things down for a while .
How about typical winter temps for a North Centeal Texas location ? Go to the north west corner of Texas and it ain’t nothing like Houston.

 

[hd6gtom]

Friend of mine bought 1 new. Overheated from day 1. JD looked at it many times. They finally tore the motor down and found as bolt broken off in the oil pump. Don't ask me why the motor got hot, I can't remember the reason. New oil pump fixed the problem.