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JD 2020 Hydraulic fluid soaks up water

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Theresa

11-28-2002 16:43:31




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We've had the 2020 for several years and the hydraulic fluid just sucks up water. We change the hydraulic fluid out every couple of years or the brakes freeze up in cold weather. This year, we changed it once and the hydraulic fluid was still looked like milk, so we changed it again. And we may have to change it yet again. (Probably about 30 gallons for three changes. Argghs!)

Does anybody have a solution of how to filter out the water out of the hydraulic fluid?

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davidval

11-29-2002 05:28:35




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 Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-28-2002 16:43:31  
major spot for water entry into the rear end is the shift rods rubber boots.
water in the rear end will also affect brake lining adhesion to the brake discs. linings will fall apart and metal will rub against metal in the brakes, this will result in metal sawdust in the transmission and hydraulic systems. after you solve the water entering problem check the brake linings!
when you change the oil not all the old oil will come out and anyway you have to run the engine and operate all hydraulic functions in order to circulate the oil in the system.
you can use for flushing a cheap oil or even clean used oil(oil replaed at another tractor at rutine maintenance). and flush the system until oil draind is clear. don't forget to drain the oil from the filter housing each flush.
when you are finished flushing, then and only then you should fill the system with new, correct oil and also replace the filter.
if the water amount in the oil is small,water can be vaporized by heating oil to over 212 deg.
david

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Theresa

11-29-2002 08:27:55




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 Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to davidval, 11-29-2002 05:28:35  
Great comment. The gear shift boots are bad. We actually have new boots, but have not yet replaced them. That will now become a priority.

"water can be vaporized by heating oil to over 212 deg"
I had thought about boiling the oil to vaporize the water. Will boiling the oil ruin the oil, its additives etc.?



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davidval

11-30-2002 01:49:48




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 Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-29-2002 08:27:55  
as far as i know oil shold not lose any properties at 212 deg. i know of engines in which oil temp. of about 220 deg. is considered normal.
when heating the oil you should monitor the temp. and not let it exceed a few deg. over 212.
NEVER USE ANY KIND OF OPEN FIRE TO HEAT OIL!! SERIUOS FIRE HAZARD!!
david



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2020 in mn

11-28-2002 17:11:46




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 Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-28-2002 16:43:31  
Any ideas where the water is coming from? Is it just condensation?



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Theresa

11-28-2002 20:32:56




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 Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to 2020 in mn, 11-28-2002 17:11:46  
I don't know where the water is coming from. But I have been searching on the web for water absorbing filters for hydraulic systems, and one way for water to enter is the breather cap as well as surfaces like the piston rod. The tractor is like over 30 years old. Maybe the breather cap is bad??? Any other ways the water can enter?

Also it is a LOT of water in the fluid; the fluid looks like watery milk even after changing the fluid the first time. What is worse is when the brakes freeze and lock up in cold weather = not a lot of fun getting the tractor home. We don't use the tractor very much - snow blowing, grading the driveway etc., but we do have to change out the hydraulic fluid every couple of years because of the water in the hydraulic fluid problem. My dad had tractors on the farm, and I don't ever recall him having problems with water in the hydraulic fluid. Is this just a problem with 2020s or is something wrong with it?
Theresa

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2020 in mn

11-29-2002 05:15:37




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 Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-28-2002 20:32:56  
With that much water, the tractor must be parked outside when not in use. Do you see any bolts missing from around the operator's seating area? From what you describe, the water must be running into the system from somewhere. Another thing you might try if you have an air compressor would be to have one person place the air hose into the filler cap behind the seat and wrap a towel/rag around the hose so some air pressure can build up. Another person could then use their eyes, ears and feel to find the leak. Obivously the leak has to be above the fluid level. Hope this helps.

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mike

11-29-2002 06:22:59




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 Re: Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to 2020 in mn, 11-29-2002 05:15:37  
The main place the water will enter the tractor is around the gear shifter boots, or it could be condensation,if you see the outside of the tractor sweating its sweting inside to. I have also seen people leave oil supply buckets in back of pickup rain in the bucket then not knowing water is in their new oil they add oil and water to tractor. By the way hte proper oil for 2020 is JOHN DEERE HYGARD.

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Theresa

11-29-2002 08:28:07




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 Re: Re: Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to mike, 11-29-2002 06:22:59  
Great comment. The gear shift boots are bad. We actually have new boots, but have not yet replaced them. That will now become a priority.



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Theresa

11-29-2002 11:44:19




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 Re: Re: Re: Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-29-2002 08:28:07  
Replaced the gear shift boots on the JD 2020. We had to grind the gear shift knobs off to get the boots on. The top of the gearshift levers are knurled. JD must put the boots on the gearshift levers then mold the gearshift knobs on. FYI Just in case anybody else has problems getting the gearshift knobs off!



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HTR

11-29-2002 15:29:52




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 Re: Re: Re: Re: Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to Theresa, 11-29-2002 11:44:19  
The knobs screw on. The knurling is on a metal sleeve with internal threads that screws on the shift rod.



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Theresa

11-29-2002 19:05:43




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 Re: Re: Re: Re: Re: Re: Re: Re: JD 2020 Hydraulic fluid soaks up water in reply to HTR, 11-29-2002 15:29:52  
Arrghs! Our gearshift knobs would not screw off. Either someone expoxied them on or they were rusted on. Now we have to grind off the knurled piece without damaging the threads or forget replacing the knobs.
Theresa



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