Farmpro 2430 hydraulic pump

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.

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.

Cullen wrote:

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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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:

Did you replace the other seals as well?

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.

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.