Forum › Forums › Tractor Troubleshooting › Farmpro 2430 hydraulic pump
- This topic has 15 replies, 2 voices, and was last updated 5 years, 6 months ago by Bob Rooks.
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June 18, 2019 at 1:33 pm #48912
So I replaced the oil seal in my farmpro hydraulic pump and still no success. Hydraulic fluid still pushes into the oil. Am I doing something wrong, is there a certain way that the oil seal goes in, did I put it in too far? If someone could help explain how to do it if I am doing it wrong that would be awesome, pictures would be great to… it sucks you can’t find anything on YouTube or Google about these tractors 🙁 :wacko:
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June 18, 2019 at 3:37 pm #48913
If possible, post some pics of how you are installing the seal (hindsight being 20-20). I believe the method was posted before, but the side with the spring on the lip goes facing the hydraulic oil side. The seal should be pressed in (not hammered) slowly until the face side (opposite the spring side) is flush with the outside of the pump end housing. Here is a video showing the basics, never mind the advertising,
Also, make sure there are no blockages in the hydraulic system that could cause the pump to deadhead, such as bad quick-couplers, stuck relief valve, etc. If you have a pump with excessive clearances, that will cause full hydraulic pressure to exert against the seal, which it is not designed to hold against.
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June 18, 2019 at 7:33 pm #48914
I have noticed a lot of hydraulic pumps use circlips on there oil seal. Does anyone know if this model or type of hydraulic pump uses a circlip… the hydraulic pump is a CBN-E314L
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June 18, 2019 at 7:59 pm #48915
I can’t even remember all the brand names of the hydraulic pumps I’ve rebuilt over the past 50 years, but I don’t recall any of them capturing a lip seal with a c-clip. Can you please furnish some details? The CBN-E314L hydraulic pump does not use a c-clip – anywhere. Here is what a seal kit looks like for your pump. If you didn’t replace ALL of the seals, you’re asking for it.
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June 18, 2019 at 8:11 pm #48917
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June 18, 2019 at 8:13 pm #48919
When I put my oil seal in I pushed it in all the way to where it was flush with the inside of the hydraulic pump. I put the spring part of the oil seal towards the outside of the hydraulic pump I did not use a circlip but for some reason it’s still push hydraulic fluid through to the oil?
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June 18, 2019 at 9:19 pm #48920
When I put my oil seal in I pushed it in all the way to where it was flush with the inside of the hydraulic pump. I put the spring part of the oil seal towards the outside of the hydraulic pump I did not use a circlip but for some reason it’s still push hydraulic fluid through to the oil?
Well, you installed the shaft seal backwards. The spring goes to the inside, and body flush to the outside, just like in your picture. Did you replace the other seals too? They are just as important. And forget about c-clips, there aren’t any. Think about it for a second – if a c-clip was needed to hold in a lip seal, then the fit wouldn’t be tight enough to effectively seal. :scratch:
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June 18, 2019 at 9:36 pm #48921
I will definitely try to do it that way :-). I don’t know why but in that picture that I posted it looks like the seal is pushed all the way in and the c clip is on it
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June 18, 2019 at 10:00 pm #48922
Did you replace the other seals as well?
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June 18, 2019 at 10:10 pm #48923
Yes. All of them
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June 18, 2019 at 11:37 pm #48924
So I went outside and took a hydraulic pump off and these are the pictures of my pump the triangle seal for some reason looks like it’s starting to wear out a little bit around the edges if you can see that in the pictures and the oil seal got push all the way up as far as it could and shredded which are also in the pictures… but I did also see that the oil seal has a spring around both ends of it what you will see in the picture. So I will take a picture of both sides so maybe you can tell me which way you think it possibly goes in
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June 18, 2019 at 11:38 pm #48926
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June 18, 2019 at 11:40 pm #48928
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June 19, 2019 at 12:57 am #48931
A bi-directional double lip seal to prevent cross contamination. These are not pressure rated seals and are only capable of holding 8-10 psig. That shaft looks pretty dirty too, and there’s a chance you could have damaged the seal installing it over the shaft. I’m beginning to suspect the pump is deadheading.
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June 19, 2019 at 1:58 am #48932
So what is deadheading? I could never really figure that out. Does that mean I need a new pump or is that fixable… and when I installed the seal in the pump casing after that I slid the shaft through it very slowly so I’m not too sure I damaged it but I’m not sure why it’s blowing it out like it’s got too much pressure or something because I put the seal all the way in and when I pulled it out just now it was at the tip of it easy to pull out with just my fingers
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June 19, 2019 at 2:19 am #48933
These are positive displacement pumps and are capable of producing very high pressures. Deadheading happens when the pump pumps against a closed valve or restriction without a pressure relief valve, and exceeds design pressure. Sometimes the pump itself cracks open or a hose bursts. I believe you’ve been pretty lucky so far. If you have a front end loader with quick connect couplers, check to make sure the couplers are connected properly, they may have to be disassembled to be checked. Another item is the relief valve in your control valve, this should be inspected as well.
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