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 | Eric D.
Join Date: Posts: 1 
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2001-06-02 28904
Hello, I own a 4100 hydro with 410 loader. Tractor and loader have 75 hours. Both the mast cylinders and bucket cylinders have had new seals installed because of leak down. The mast cyclinders seem fine but I'm concerned about the bucket cyclinders. I know there is test you can perform by putting a specified amount of weight in the bucket and record the time and measure the height and determine the amount of fall in a specified time. I'm not sure what those specifics are but I will find out from my dealer. Before I go to the dealer I thought I would explain what I think is leak down. I can fill my bucket full of stone (a lot of weight, not sure how much) and drive on a smooth black top road 1/8-1/4 mile and the bucket role back has dropped approx. 3-5 inches. Doe's this sound normal. My dealertells me it is. I know another 4100 that claims even fully loaded, he gets no leak down. I wonder if I may have a problem in the SCV valve. Thank you, Eric
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| Craig Dashner
Join Date: Posts: 1
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2001-06-06 28963
That does NOT sound normal. Sitting overnight, I could see that it may be normal, but driving.... I don't think so. Mine does not do it, if it does it is such a little amount that I do not notice it, maybe an inch with a heaped bucket and a long drive. Good luck! ....
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 | cutter
Join Date: Feb 2000 Posts: 1307 The South Shore of Lake Ontario, New York 
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2001-06-06 28995
I did not notice my 4100 creeping down, I never drove it far eather. What I can tell you is that heavy construction machines exhibit that characteristic. I used to drive both Ford and Case tractors over the road with buckets full of whatever and you would have to remember to curl every so often. If you forgot, a bump in the street and chunks of material falling out would remind you. Hope this helps! ....
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| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley 
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2001-06-07 29013
I guessing that there is a design trade off between tightness and durability. It it's so tight there is no leakage, it may not last as long. A way to distinguish between leak-down in the SCV or in the cylinders is to put a load in the bucket, take the hoses off the SCV and let it sit awhile. I don't know if the 410 loader is one of the JD's with a fast/slow dump speed feature I've heard of. Don't know if such a feature, or the use of self-leveling or regenerative features found on larger equipment would contribute to leak down. ....
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| Eric D.
Join Date: Posts: 1
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2001-06-07 29040
Thanks for everyones reply's. Tom, thats a great idea disconnecting the hydraulic lines with the bucket loaded. Do you think it will be difficult hooking the lines back up with the load in the bucket thus creating a lot of pressure? Eric ....
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| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley
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2001-06-08 29048
I think most loader lines connect to the SCV with quick connects. A sleeve around the female fitting connects pushes forward and the hose slips out--best done with the engine off. Actually, disconnecting the lines wouldn't work unless quick connects are present. The male connector ends have a ball bearing that seals the line pressure when disconnected. When disconnecting quick connect fitting, it's best to sit everything on the ground with the tractor off and operate all control valves to relieve any pressure. A line under pressure that is disconnected can be hard to connect. The ball bearing sometimes has to be manually depressed to relieve pressure. Sometimes the lines from an implement that was disconnected on a cool day can't be reconnected on a hot day without pushing the bearing in. Reconnecting quick connect lines is a matter of pushing the sleeve forward, and pushing the connectors together. When started, a nudge will usually seat the connector and the sleeve will snap into place. I sometimes jostle a control valve to get the connector to seat. It should be noted that a quick connector connection isn't a hard one. A good pull on a line, and the connector will part. ....
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