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Kubota b7610 w loader hydraulic question

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mjs122276
Join Date: Jan 2008
Posts: 3 Pittsburgh
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2008-01-07          150027


I am newer to tractor work I guess you could say. I blew a hydraulic hose to my FEL today. I plan on picking up a new hose tomorrow. After I install the house, do I need to bleed the lines? I know I have check the level. Also would it be worth having a nice set of stainless steel lines made up. There is a custom hose shop across the street from my office that can make high pressure SST hoses.

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Kubota b7610 w loader hydraulic question

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candoarms
Join Date: Mar 2007
Posts: 1932 North Dakota
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2008-01-08          150031


Mjs122276,

Since you are new to the tractor world, and hydraulics in general, I have a few words of caution for you. Please bear with me.

You'll first need to make sure you don't have any pressure remaining on any of the hydraulic lines. This is word of warning. Be careful.

(I know that you have one line already broken, which will have no pressure on it. But, there are other hydraulic lines that may have pressure stored in them. If you replace all of the hoses with stainless steel tubing, you should follow my instructions here. However, I may have forgotten something, so please be careful.)

With your tractor shut off.....proceed as follows.

Your loader's hydraulic cylinders should be fully retracted as it sits, or nearly so......with the bucket resting on the ground, and tilted with the bucket's bottom resting level on the floor.

Carefully loosen the hydraulic fittings....slowly. If there is any pressure on the system, it will slowly bleed off at this point. (oil may spray in your face and eyes) You should be wearing safety glasses, or a face shield.

Your loader may now begin to move as the pressure bleeds off. Be careful that you don't have your hand, leg, foot, or arm in its path as it settles.

With the loader completely settled, you can now remove any and all hydraulic lines.

Replace each hose, one at a time. Do not disconnect all of your hoses at once, as you'll quickly lose track of where they should connect back up.

After your hoses or steel hydraulic lines have been replaced, check your fluid levels, then start the tractor and let it warm up.

If you attempt to run up the throttle with air in the lines, it can cause a huge amount of vibration and shock to the hydraulic system. It's not good to do this. The shock on the system can blow out seals in cylinders, or deform them, causing them to leak.

After the tractor has warmed up, leave it run in the idle position. Do not throttle it up until after you have put the loader through its paces.

Run the loader to max height and back down a few times, and then run the bucket to full dump and full return a few times. Do this while the tractor is running at idle engine speeds.

You may need a second person to help you at this point. You'll need somebody to put the loader through its paces while you check the hose fittings for leaks.

Work slowly. Keep your hands and arms outside of the loader. Wear your safety glasses or face shield, as a tiny hydraulic leak is very difficult to see.

DO NOT.......I repeat....DO NOT attempt to check for leaks around the new hose fittings with your hands. High pressure hydraulic fluid can easily amputate a finger, cause severe injuries to the skin....even death.

Use a clean paper towel to help check for leaks.

Roll up a paper towel and stick one end of it in and around each fitting. This will allow you to keep your hands a safe distance away. Even so, you should be wearing leather gloves while you do this. Check for leaks as your assistant runs the loader slowly through its paces. Watch your arms and hands so that you don't get them caught in the moving loader.

If you see no leaks, you're all set.

Joel ....

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Kubota b7610 w loader hydraulic question

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Art White
Join Date: Jan 2000
Posts: 6885 Waterville New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2008-01-08          150041



Most all hydraulic systems will self bleed on loaders as well as hydraulics off the back. The only time you might have trouble is if the cylnders are sequental in operation.
....

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Kubota b7610 w loader hydraulic question

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mjs122276
Join Date: Jan 2008
Posts: 3 Pittsburgh
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2008-01-08          150065


Thanks, I am not 100% new to hydrolics, my father has an old kubota, but what you said is a big help!

One other question, I just replaced the one hose the blew and ran the loader up an down several times as you suggested, I think there is something wrong with my hydrolics however (and I notied this before I blew the hose) If I try to lift the tractor off the ground wth the bucket, it is unable to do it. I would think a tractor this size should have plenty of hydrolics do do this? ....

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____________________________________________________________________________________
Kubota b7610 w loader hydraulic question

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mjs122276
Join Date: Jan 2008
Posts: 3 Pittsburgh
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2008-01-08          150066


and I just realized I have been spelling hydraulics wrong this etire time...sorry ....

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Kubota b7610 w loader hydraulic question

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Art White
Join Date: Jan 2000
Posts: 6885 Waterville New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2008-01-14          150214



At what RPM? Will the bucket curl it up? Is the tractor in neutral? ....

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