B7800 FEL leak
- Thread starter Rob 80
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I just did the one on my b7800. Easier than some. I made my own spanner wrench but the gland nut was not tight. No special tools needed. The hard seal was the only difficult on and I soaked it in 225 degree hydraulic oil so it would stretch easily. After it was on in was extra sloppy fit. I put a hose clamp on it just snug and when cooled in a short time was fine. I loosened the gland nut while on the tractor to old the body.
azbinder
Gold Member
Can you post a pic of where it's leaking?
5030
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If it's leaking in just a certain spot, chance are the piston rod is damaged. If it was ne, I'd take it to a competent hydraulic shop and have them assess the issue. Replacing the seals won't cure your leak problem if the rod is damaged.
azbinder
Gold Member
Probably just need a seal kit, but if you take the cylinder off the loader and extend it out fully, you can check the rod and see if it is damaged. If no damage then reseal it, otherwise you may have to replace the rod too.
5030
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Keep in mind that 'damage' causing leakage can be anything from a deep scratch to a slight bend. One the hard chrome on the piston rod (which is what you refer to as the 'silver arm' which is really the piston rod si compromised, the seals will weep. Why, instead of attempting to replace the seals, it would behoove you to take it to a competent hydraulic shop and let them inspect and repair it. Not gonna be all that expensive in the first place and if they do it, you have a guarantee that it will be right. If you do it, there is no guarantee at all and if it still leaks, it's 100% on you.
Smokeydog
Elite Member
Definitely a learning curve on replacing hydraulic seals and some specialty tools are required sometimes. Gets better with practice. Pay for the education, experience and practice or pay someone else. Sometimes finding a good hydraulic shop that can help you now and in the future is good experience too.
So just check to see if it's straight? It has been outside all it's life i'm sure that does not help things. I have replaced most all of the hoses on the FEL.
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You need a precision straight edge to check the straightness of the piston rod anyway, actually a precision straight edge and feeler gauges plus you have to know what the deviation tolerance is.
5030
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Candidly, from the look of that loader, I'd almost bet the pins are sloppy too. East to tell how much slop there is. Before you mount the loader to the tractor and it's standing on it's built in removal legs, try wiggling the uprights back and forth. If the move excessively, the pins are worn.
I just replaced all the pins on the loader on my one M9, but I machined my own in the shop from bar stock. They are pretty expensive to purchase and only a dealer part, no aftermarket.
I just replaced all the pins on the loader on my one M9, but I machined my own in the shop from bar stock. They are pretty expensive to purchase and only a dealer part, no aftermarket.
ptsg
Super Member
Pretty sure that a LA1153 loader would be too big for a B7800 tractor. It was simply a picture used as an example and it's not the actual loader of the tractor.
To the op, the tractor and loader has a few years on it, so it's most likely bad seals and you can get those cheap from an hydraulic shop or just have them do the work. It may end up being cheaper than the so called OEM seal kit.
5030
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My philosophy with being frugal (aka:cheap) when replacing or refurbishing various parts and assemblies is...
If it's simple and I have the knowledge to do it as well as the correct tools, I'll do it. If I don't, I have a shop do it and cylinder repair and determining whether it's rebuildable or not should be left to a shop with experience and it's not all that expensive in the first place.
Do it incorrectly and it will continue to leak, maybe even worse that initially.
If it's simple and I have the knowledge to do it as well as the correct tools, I'll do it. If I don't, I have a shop do it and cylinder repair and determining whether it's rebuildable or not should be left to a shop with experience and it's not all that expensive in the first place.
Do it incorrectly and it will continue to leak, maybe even worse that initially.
