L3710 Leaking Fluid Under Front End

Mr Haney

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Equipment
L3710
May 23, 2022
152
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FL
My L3170 has started leaking fluid under the front end. It appears to be coming from above the two hydraulic lines that are exposed on the bottom of the tractor.

Moving the FEL doesn't seem to affect it, but turning the steering wheel under power makes the fluid leak fast.

Any suggestions as to where I should look first?
 

Mr Haney

Member

Equipment
L3710
May 23, 2022
152
24
18
FL
I am Googling around for information, and it looks like Kubota recommends replacing the power steering hoses every so often. I have no idea how old mine are. I assume a hydraulic hose is a generic part so I wouldn't have to search for hoses made by Kubota.

I just remembered something. The other day, I was carrying stuff on my brush forks, and the front wheels of the tractor kept trying to straighten up during turns. I guess the leak has to be somewhere in the power steering parts.
 
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woodman55

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L6060HSTC, RTV 1100
May 15, 2022
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canada
I am Googling around for information, and it looks like Kubota recommends replacing the power steering hoses every so often. I have no idea how old mine are. I assume a hydraulic hose is a generic part so I wouldn't have to search for hoses made by Kubota.

I just remembered something. The other day, I was carrying stuff on my brush forks, and the front wheels of the tractor kept trying to straighten up during turns. I guess the leak has to be somewhere in the power steering parts.
The hoses will need to be the correct size, length, and have the correct ends. In a confines area like the front end, you pretty much need exact replacements as there is little room for error. Lots of places, including farm equipment dealers make custom hyd hoses, but you will need the old ones as a pattern for them to go off of. Some times it is just easier to get the factory hoses if the price is reasonable.
 
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GeoHorn

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…..get the factory hoses if the price is reasonable.
:ROFLMAO: 🤣 :p:ROFLMAO:

I’d have to give up any dreams of buying more post-plague real estate if I had to buy factory hoses.
 
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Mr Haney

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Equipment
L3710
May 23, 2022
152
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18
FL
Yeah, I am highly skeptical of OEM parts that appear generic. After all, Kubota and dealers make money on parts and labor more than tractors.

I can't find a Kubota part number for the hoses, and I can't find anyone on the web giving a description of them. I'm sure someone here has replaced theirs and has the information.

I don't really want to yank them off and drive them around town looking for replacements if I can avoid it.
 

woodman55

Well-known member

Equipment
L6060HSTC, RTV 1100
May 15, 2022
928
721
93
canada
Yeah, I am highly skeptical of OEM parts that appear generic. After all, Kubota and dealers make money on parts and labor more than tractors.

I can't find a Kubota part number for the hoses, and I can't find anyone on the web giving a description of them. I'm sure someone here has replaced theirs and has the information.

I don't really want to yank them off and drive them around town looking for replacements if I can avoid it.
It could also be a blown o-ring or a loose fitting. clean things up and find out for sure just where the oil is coming from. Then go from there.
 

whitetiger

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Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
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Yeah, I am highly skeptical of OEM parts that appear generic. After all, Kubota and dealers make money on parts and labor more than tractors.

I can't find a Kubota part number for the hoses, and I can't find anyone on the web giving a description of them. I'm sure someone here has replaced theirs and has the information.

I don't really want to yank them off and drive them around town looking for replacements if I can avoid it.
TA040-33524 is the part number for the steering hoses to the front of your tractor. Both hoses are the same part number.
 
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GeoHorn

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NAPA, CARQUEST, and most hydraulic shops can make hoses from your examples. Call ahead to avoid “driving around” .
 

Mr Haney

Member

Equipment
L3710
May 23, 2022
152
24
18
FL
I found the factory hoses online. They are very cheap. Only $145 each. This is why people don't buy OEM parts unless they have to. They could charge $25, which is still extremely high, and make a killing, and people would actually want to buy OEM, so they would sell more. One would think so, anyway. Perhaps I am wrong.

I can go to Surplus Center and get USA-made hydraulic hoses for $5, so I have to wonder what's so special about Kubota hoses.

My plan is to start the tractor tomorrow and try to tighten all the hose fittings. If the leak stops, I'm fine. If not, I'll look around and see if I can spot the leak visually. If yes, I'll try to fix whatever is leaking.

A Youtube guy says a leak that isn't spraying is on the low-pressure side. I know that's not necessarily true, because I had slow leaks on my John Deere's rear cylinder and my Kubota's hydraulic lines, but anyway, he said he had a leak because his hydraulic oil cooler hose, which is low pressure, was loose. I plan to see if I can find my hoses and check them.

The part number for the cooler hoses is TA240-21150, and they only cost $54 each. I seriously have to wonder if a tiny piece of low-pressure oil hose needs to cost more than $5. Amazon sells oil cooler hose for about 30 cents per foot.

I wonder if a mouse bit one of the lines. I would think the cooler hoses would be softer than steering lines.
 

Pau7220

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L3650 GST, Landpride TL250 FEL w/ Piranha, 6' King Kutter, GM1084R Finish
Aug 1, 2017
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Scranton, PA
Whatever you do, DO NOT run your hand in the area trying to find the leak. If it is a high pressure spray, it can inject fluid through the skin.
 

North Idaho Wolfman

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There is no LOW pressure side, both lines are high pressure.
It just depends on which way you turn as to which line becomes the return line at that moment.