Rubber hydraulic hoses leaking: Kubota Review  -- Kubota Tractors Discussion Forum and Review Rubber hydraulic hoses leaking: Kubota Review -- Kubota Tractors Discussion Forum

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 03-29-2002, 19:59 Post: 36863
Morgan Wright
2002-03-29 19:59:31
Post: 36863
 Rubber hydraulic hoses leaking

I just bought a B6200, it was made in 1988. First thing I did was change all the fluids and filters, of course. When I dumped the hydraulic fluid it was white and milky. So I checked all the rubber hoses and two of them are cracked and leaking. This explains the milky fluid, it obviously had water in it from the leaky hoses. I took off the two leaky hoses and will get new ones tomorrow.

Is this a common problem? Are all the rest of the hoses going to leak too? Replacing all 25 odd hoses would be a big pain in both cheeks.

Do other people with older Kubotas find that the hoses leak?






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 03-30-2002, 05:43 Post: 36872
TomG

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 Rubber hydraulic hoses leaking

I wonder if the tractor set outside and unused for a long time? I can't imagine that a hose cracked enough to admit into the oil would hold any sort of pressure.

Near as I can figure, the hoses on my ford 1710 are around 15 years old and without cracks or appreciable weathering. On the other hand, our local snow mobile club has a NH farm tractor converted into a tracked trail groomer. I was surprised to see club members putting on a new set of hoses this winter. I don't think the tractor is all that old, so maybe hoses do go bad. The groomer does sit outside.

Hydraulic hose comes in a wide range of type and grade. I wonder if the hoses go to Kubota or major after-market equipment that could be expected to use high grade hose or if original hose could have been replaced. Since hose integrity is a safety issue, I believe Id have it all checked. Most hydraulic hose is coded as to type and grade. Id sure verify that the hose is appropriate for the application.






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 03-30-2002, 06:11 Post: 36873
Morgan
2002-03-30 00:00:00
Post: 36873
 Rubber hydraulic hoses leaking

Yeah, it has some rust here and there so I'm sure it sat outside all the time. Now I'm going to get two or three extra hoses of different lengths made up for next time they leak, because when they leak, it's a pain, you have to take the old hose off and take it into the shop so they can make up a new one and it takes a few days all that time you can't use the tractor. I'll have a few made up ahead of time.






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 03-30-2002, 06:31 Post: 36875
TomG

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 Rubber hydraulic hoses leaking

It would be good to keep in mind that a hose can rupture and result in a loaded loader bucket that drops like a shot. Twenty-five hoses would be a pain to replace though, but Im not sure Id want to keep using suspect hoses and wait for them to start leaking.

I'm interpreting that the situation is the hoses leak along their lengths rather between the hose what ever fitting is on the ends, or from around fitting threads. It may be common knowledge, but leaky threads often can be fixed with liquid hydraulic sealer or Teflon tape applied to only the top half of threads on the male end. Leaks between a hose and a fitting may be a hose that was poorly made rather than the hose itself. In such a case, a hydraulic shop might be able to put on new ends if there's some slack in the hose. However, I really don't know how much cheaper redoing hoses might be rather than just getting new ones.






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 03-30-2002, 07:56 Post: 36878
Peters

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 Rubber hydraulic hoses leaking

I had a couple of hoses go on a FEL at about the same length of time. The position that they went was in the most flexed area.
The outer layer of the hoses will go weather in the barn or out. It will be sped up with the UV and heat out side but will still deteriate over time. Ground based ozone is the cause therefore any thing that emmits ozone will increase the rate of deteriation. Ie setting the machine next to the welder, gen set, etc is not a good idea.
You can coat the lines with tire protectants, silicone wax is what is often used at the hose factory. I had some duPont florocarbon material that was better.
Some how I cannot see myself having the time to clean hoses and wax hoses. Maybe I will just get a little sloppier with the teflon grease.






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 03-30-2002, 19:18 Post: 36892
Morgan
2002-03-30 00:00:00
Post: 36892
 Rubber hydraulic hoses leaking

The hoses are all very stiff. It seems like any sort of bending will make more of the break. But I'm only going to replace the two and not bother, who knows if any more will break.

The previous owner only used the Kubota to scoop horse manure from a barn. Maybe the ammonia from the horse shit caused the rubber to deteriorate.






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 04-01-2002, 21:35 Post: 36971
Morgan
2002-04-01 00:00:00
Post: 36971
 Rubber hydraulic hoses leaking

Success!! Today I replaced the two leaky hoses and tightened it all up and there is no more leaking. I stuck a gallon of hydraulic fluid in the tranny and I'm going to work the tractor for one day, dump the hydraulic fluid again, and then fill it again with the 3 gallons.

(Hydraulic fluid capacity is 12.1 quarts but it works fine on only 4 quarts. I'll use that to work out any remaining water in the system).






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 04-02-2002, 05:07 Post: 36979
TomG

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 Rubber hydraulic hoses leaking

Sounds like a good result. I would keep in mind that the hydraulic oil in most compacts also lubricates the transmission and rear axle. The oil level also decreases when any hydraulic cylinder is extended. I don't think I'd want to do much work with my tractor if the oil level was very low.






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 04-02-2002, 09:38 Post: 36989
Art White



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 Rubber hydraulic hoses leaking

I haven't seen what you are talking about as far as a hose leaking oil out and taking water in. I would believe that the oil hasen't been changed in several years and the moisture is from condensation. It will probably take two changes of your oil to clear the system of the moisture.






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 04-03-2002, 04:38 Post: 36996
morgan
2002-04-03 00:00:00
Post: 36996
 Rubber hydraulic hoses leaking


I'll take your advice, today I'll just start it and run the lift up and down several dozen times, then drain it. I won't do any actual work with just one gallon of fluid in it. Thanks!!

How did the water get in? I figure if the hose has a tiny pinhole leak, just enough to just ooze some oil out, then I figure when the tractor sits over time the rain will soak the pipe and the water will get in one drop at a time. The tractor is 13 years old and sat outside.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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Art White 1 | bigbukhntr 1 | Morgan 6 | Morgan Wright 3 | Peters 1 | TomG 7 |




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