[AT] Deere 4020 oil leak

[Cecil Bearden]

Probably best putting a new one on it, unless that new one is paper 
thin..  I have had pretty good luck soldering radiators with a small tip 
on my acetylene welding torch.  If you can find that solder and flux 
mixture that was called FAST at one time it works great.  heat a little 
to melt the paint and scrub with a wire brush.  use just a little acid, 
then put the paste all around the seam, and heat while applying the 
solder wire...  A leak on the underside of the connection while the 
radiator is on the tractor takes a little longer and a little more 
contortions.  The older I get, the more those contortions result in 
cramps...

Cecil in OKla


On 3/8/2017 8:36 PM, John Hall wrote:
> Found my leak--radiator. I would have bet money that it was oil--it was
> more yellow (not green) and felt pretty greasy. Long story short, top
> tank leaking at seam. The way we park the tractor it is headed slightly
> down hill (there is no flat land here--every shed is on a hillside). The
> clamp for the radiator is 1/2" or so from the core. So with the tank
> leaking up top on the front side, it drips onto the clamp, which runs on
> the bowl, which--well u get the idea. I tried to get up with the local
> semi-retired radiator repair guy, no luck--must be fishing at the coast.
> I said screw it and ordered one from Shoup. He had 11 in stock and sold
> 34 last year, so the quality must be decent. There were a couple places
> a little cheaper online but I have had great results from Shoup, and
> shipping was free. I have no intention of ever letting this tractor go
> so I don't mind springing for a new radiator--still hurt the wallet though.
>
> John Hall
>
> On 3/7/2017 9:34 PM, John Hall wrote:
>> You'd think an oil leak would be obvious regarding its source. Well I
>> have one that isn't.  I'm trying to trace it down but so far no luck.
>> Figured I would toss it out to the list to see if anyone here has ever
>> ran across such. The worst part is you need to be familiar with this
>> machine, maybe 4010, 3020's etc are built the same way. I'm getting
>> hydraulic oil dripping off the bottom of the air filter. The oil appears
>> to be getting on the clamp that holds the dust bowl on, running down and
>> dripping off the bowl on to the area between the radiator and fuel tank,
>> then running and dripping on a front tire (tricycle front end). I
>> figured it was a line or something going to the oil cooler which is
>> mounted right beside the air filter. Pulled the hood off and everything
>> looks dry. Can't find a leak anywhere. Nothing appears to be spraying
>> oil either. Its too clean to be engine oil, and does not appear to be
>> diesel or anti-freeze. It leaked enough when I parked it last night that
>> it ran all the way down the face of the tire. I left it in the shop
>> tonight to see what is going on. Anyone ever heard of such a problem?
>>
>> John Hall
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