I hate to start nationwide panic but after what Ive discovered this week this applies to all deere combines from 9000 walkers,cts, and STS rigs.
The air to air coolers are of such poor design being furnace brazed with round tubes and channel tanks, do not hold up to the vibration/harmonics of the radiator fan or engine.
I had one out of a 9650 last season and it was leaking out where the tube meets tank at almost every connection on both sides of the core, at only 10 lbs test pressure. I assumed that it was because in this application it was not rubber mounted or isolated properly,,, I was wrong. Last week I removed both coolers from two 9600s which are not mounted at all but have only one bolt in the center bottom of the core that the cooler sits on, then hose connections and thats it, basically free floating in a sense, BOTH were leaking severly out both tanks where tubes meet at 10 lbs test pressure.
Deere has no updates, Ive got friends in service at deere dealerships but have no desire to even try to complain. I cant be the only one who has seen this, there are nearly a million 9600s out there and Im positive that they all leak just the same.
One machine has 2500 hours, my 50 had only 1700 hrs when it was replaced last year.
Soon I will remove the 50 cooler once again to check it out and make a decision on what to do.
My radiator man is confident that adding the appropriate epoxy specifically designed for aluminum coolers will take care of the problem, sure it will seal up the leaks but who knows about the vibration.
A serpentine core would be the way to go in these rigs but they are much more money and once again deere cuts a corner.
Another thing we found is deere uses springs jammed into the tubes from the side to help transfer the heat, and some had come loose and worked their way out, laying in the bottom of the tubes,, what a joke.
The air to air coolers are of such poor design being furnace brazed with round tubes and channel tanks, do not hold up to the vibration/harmonics of the radiator fan or engine.
I had one out of a 9650 last season and it was leaking out where the tube meets tank at almost every connection on both sides of the core, at only 10 lbs test pressure. I assumed that it was because in this application it was not rubber mounted or isolated properly,,, I was wrong. Last week I removed both coolers from two 9600s which are not mounted at all but have only one bolt in the center bottom of the core that the cooler sits on, then hose connections and thats it, basically free floating in a sense, BOTH were leaking severly out both tanks where tubes meet at 10 lbs test pressure.
Deere has no updates, Ive got friends in service at deere dealerships but have no desire to even try to complain. I cant be the only one who has seen this, there are nearly a million 9600s out there and Im positive that they all leak just the same.
One machine has 2500 hours, my 50 had only 1700 hrs when it was replaced last year.
Soon I will remove the 50 cooler once again to check it out and make a decision on what to do.
My radiator man is confident that adding the appropriate epoxy specifically designed for aluminum coolers will take care of the problem, sure it will seal up the leaks but who knows about the vibration.
A serpentine core would be the way to go in these rigs but they are much more money and once again deere cuts a corner.
Another thing we found is deere uses springs jammed into the tubes from the side to help transfer the heat, and some had come loose and worked their way out, laying in the bottom of the tubes,, what a joke.
