HYDROLIC LEAK DOWN: Tractor Engine Repair Rebuild  -- Tractor Maintenance Discussion Forum and Review HYDROLIC LEAK DOWN: Tractor Engine Repair Rebuild -- Tractor Maintenance Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

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 08-22-2011, 09:16 Post: 179950
skipll



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 HYDROLIC LEAK DOWN

I put the bucket up as high as it would go on my Kobelco SK 015 excavator ( made in 1993). Turned the engine off. After 1 hr. 10 minutes the bucket was on the ground. (engine off)
Is this normal?






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 08-22-2011, 10:08 Post: 179951
auerbach



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 HYDROLIC LEAK DOWN

Normal? Yes for seals to deteriorate after two decades of hard service. No for a new machine -- or for one that had its cylinders and/or controller recently rebuilt. They hold up for a long time, but they're still a wear item.

The internal leak is not so bad now that it's an immediate must-do. It's like when to re-roof your house. If you can't see it leaking you can wait a year or two, but when it's convenient you might as well get it done.

A hydraulics guy can test for where the main internal leak is, and you can get just that done, or you can get them all resealed in one go.






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 08-22-2011, 11:38 Post: 179952
kthompson



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 HYDROLIC LEAK DOWN

Skip no idea on your machine but some will have (no idea if correct name but what I learned them as)a holding valve that would take the load of holding such just in case of failure while load was in the air. I have seen Teflon tape cause those to stick open.

I would have it checked, soon or later you will end up with a load suspended you don't want dropping.






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 08-22-2011, 15:05 Post: 179960
auerbach



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 HYDROLIC LEAK DOWN

Absolutely. If something breaks or blows while there's a heavy load up and someone under, ....

They are in fact generally termed holding valves or latches, and sometimes things like load-holding, load-lock, brake valves or latches, etc.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

Thread 179950 Filter by Poster:
auerbach 2 | kthompson 1 | skipll 1 |




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