I have a friend that has a older Kubota. It has a LB 400 FEL on it . He is trying to replace the seals in the pistons and it sounds like its a costly adventure. the Pistons are $400 -$500. He Bought a seal kit for 40 bucks and that did not go good. What is the cheapest route to go ? can they be replaced by a after market piston? Thanks Roger
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oldnslo
Super Member
Are the pistons or cylinder bores scored or damaged in some way? If yes then those surfaces need to be smoothed out or replaced for the seals to last.
oldnslo
Super Member
If pistons are not damaged and cylinder bores are not scored then replacing seals should put them back in working condition.
What is problem you are experiencing?
What is problem you are experiencing?
He has tried to replace the seals in the piston. It cost him 40 bucks for one seal kit . He installed the kit but still has the same problem. He said there was one washer that needed to be heated up before installing it. hes not 100% sure he did it correct. What i am trying to find out is if there is a after market piston that will fit on this Kubota FEL . 4 or 5 hundred for one piston seems pretty costly. Are Kubota pistons special in any way that you have to use just Kubota parts? If the pistons are hard to rebuild would he be better off to send them off to a place that does this on a daily bases? I have never rebuilt one so I am cluelessIf pistons are not damaged and cylinder bores are not scored then replacing seals should put them back in working condition.
What is problem you are experiencing?
oldnslo
Super Member
Not sure on if pistons are special but typically cylinders are not difficult to reseal but yes some of the seals can be a challenge to install.
Back to question of what is the problem with cylinder or why do you believe cylinder is failing? Are you 110% certain the cylinder is the problem and not another component in the circuit?
Back to question of what is the problem with cylinder or why do you believe cylinder is failing? Are you 110% certain the cylinder is the problem and not another component in the circuit?
I just got a text back from him. I asked again what the problem was and he said it is leaking internally. That sounds like seals to me. Im still looking for some Kubota owners that know where to get some replacement complete pistons. It looks like you have a John Deerr. when I was at his house yesterday he showed me the piston and that on one end it looks like a normal piston you put a pin through. The other end was special in a way. Im not sure if JD has special pistons on their tractors for FEL and so.
oldnslo
Super Member
That is normal procedure for PTFE and care must be taken to not overstretch the material during installation.
Thanks for helping out to start off. He admitted that he is not sure he did that part correct. At $40 a repair kit that can get costly. Is there a good video you know of on how to do the reseal? for the heating and stuff ?
