JD 550A. Transmission.
JD 550A. Transmission.
I have drained what I thought was all of the hydraulic fluid out of the transmission two times. However the fluid still appears to have a significant amount of water in it. What it hurt to drain it again and flush the system with diesel fuel? The transmission is overheating due to slippage of the clutches. after I run it about four hours all of the clutches start slipping including steering clutches. The hydraulic fluid is almost white it has so much water in it. What the water in it causes the slippage making it over heat?
Dude you need to find the source of all that water. Drain everything associated with the transmission. That being the transmission ,final drives and anything that has a drain plug in it that is tied to the transmission.
Let's hope you haven't cooked all the clutches in this thing. Your water will cause the slippage but it may be too late. I hope not for your sake. Any slippage is too much slippage. I'm also not a big fan of flushing with diesel fuel. A lot of guys do it and get by with it but I never liked doing it personally. You waste a lot of fuel and may still have the water hiding in a low spot. Find all of the plugs that will drain the system, change your filters and leave it sit for a few days and drip out. I have also put heat lamps on them to help dry the moisture out after letting it sit for a while. Good luck!!
Let's hope you haven't cooked all the clutches in this thing. Your water will cause the slippage but it may be too late. I hope not for your sake. Any slippage is too much slippage. I'm also not a big fan of flushing with diesel fuel. A lot of guys do it and get by with it but I never liked doing it personally. You waste a lot of fuel and may still have the water hiding in a low spot. Find all of the plugs that will drain the system, change your filters and leave it sit for a few days and drip out. I have also put heat lamps on them to help dry the moisture out after letting it sit for a while. Good luck!!
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.
The place I bought it from said it sat for several years. I have no idea where the water came from. I know it's not coolant because that's still full with no oil in it. It runs great for the first several hours. Then it starts slipping. I pulled the plugs from the steering clutches yesterday and some raw water came out first then fluid water mixture. The finals are separate compartments and different oil from what I've read. I know it's never been taken care of by the looks of the filter I replaced. I'm thinking of dumping a few gallons of fuel in it with the plugs out to just wash what it will out. Would be nice to have a way to flush the torque out. It's mostly a good machine if not for the water. Engine is super low hour factory reman. Undercarriage is 95%. all new pins and bushings in the blade. NOW if I can Just get the trany straitened out.
Most likely the water has gotten in there from condensation. Since the machine sat for a long time, I would bet condensation played a major role in how the water got in.
Enclosed Iron cavities mixed with fluctuating temperatures and humidity are water making machines. I have always been amazed at how much water can condense in these machines while sitting around.
Another way for water to enter is by people adding fluids from buckets that have sat out in the elements. This happens with fuel as well. I just dealt with a customer who had added fuel to his tractor from five gallon buckets that ride in the back of his truck. He poured in more water than he did fuel. I'm not saying this is what happened to you. I'm just saying water can enter in this way.
I hope for your sake you have found the water that was left inside. I wasn't sure if the final drives were a common sump for the fluids or not. Sounds like you have that figured out.
You can flush it some with the fuel if want. Again I would rather let it drip out and then heat the compartments if you can. But that is me, that's my preference.
You may end up changing the fluid again before your done. Clutch packs and ports and cavities inside the different components will hide a lot of moisture. So don't be surprised to find a little more milky oil after you do this. Again I wish you luck.
Enclosed Iron cavities mixed with fluctuating temperatures and humidity are water making machines. I have always been amazed at how much water can condense in these machines while sitting around.
Another way for water to enter is by people adding fluids from buckets that have sat out in the elements. This happens with fuel as well. I just dealt with a customer who had added fuel to his tractor from five gallon buckets that ride in the back of his truck. He poured in more water than he did fuel. I'm not saying this is what happened to you. I'm just saying water can enter in this way.
I hope for your sake you have found the water that was left inside. I wasn't sure if the final drives were a common sump for the fluids or not. Sounds like you have that figured out.
You can flush it some with the fuel if want. Again I would rather let it drip out and then heat the compartments if you can. But that is me, that's my preference.
You may end up changing the fluid again before your done. Clutch packs and ports and cavities inside the different components will hide a lot of moisture. So don't be surprised to find a little more milky oil after you do this. Again I wish you luck.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.
-
Stan Disbrow
- 350 crawler
- Posts: 2983
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
Castings tend to have nooks and crannines in the bottoms. Water collects there. Diesel fuel floats better on water than oil does. So, it tends to not get the water out all that well.
Unless you leave the drain open and pour a lot thru. Then it works pretty well.
Oil has additives which collect water, one of the reasons why it changes color. I would just use more oil and let it work, changing it as it changes color.
I, too, bet it got in there as vapor thru the vents and then condensed when the temperature dropped. I change all the lubricants in everything I have mid-spring every year because the water loves to condense inside during the winter. This even under a roof. What I guess I need are walls, insulation and heat to go with that roof.
Stan
Castings tend to have nooks and crannines in the bottoms. Water collects there. Diesel fuel floats better on water than oil does. So, it tends to not get the water out all that well.
Unless you leave the drain open and pour a lot thru. Then it works pretty well.
Oil has additives which collect water, one of the reasons why it changes color. I would just use more oil and let it work, changing it as it changes color.
I, too, bet it got in there as vapor thru the vents and then condensed when the temperature dropped. I change all the lubricants in everything I have mid-spring every year because the water loves to condense inside during the winter. This even under a roof. What I guess I need are walls, insulation and heat to go with that roof.
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (5045D), 2025 3025E
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (5045D), 2025 3025E
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