Its a common practice, that and using a less viscous type oils, like 00 or 0, cornhead grease. If a slow or similar leak, I like this option myself, buys you time until you can repair it, if so desired, some will not, cause the leak has stopped.
I certainly cannot say what the results are, mixing gear oils, grease etc., lots of people have mentioned no trouble with it here. There is a concern with incompatible soap bases, and although I am aware of this, I do not know what happens in these kind of applications, I do know that large or expensive machinery with lubrication instructions/specifications, mixing soap bases may not be a wise move, again, not the API and or reference standard guru either.
It would be good to hear from someone in the "know" about API, specifications, whats compatible, whats not and what does occur when you do the above.
At a good friends place they have a similar size farm, and a 2020 JD, before their father passed, he traded a sickle bar mower for a small, but seemingly well built 4' wide rotary cutter, and the gear box has a grease zerk, not a plug, wrong blades on it, like someone made them out of old ones, things are not as well taken care of as they should, they've had it awhile too, without issues, but I shake my head every summer when I see it.
I suppose you could clean and flush out the grease, not sure what you would use as a solvent, and or what if anything inside could be affected, other seals, and then replace the seals that were leaking, re-fill with correct lube, might be a wash with whats in there now, or maybe there is a slight detrimental effect over time.
This would be a cool mythbusters project would'nt it, I'd love to suggest it, something interesting to learn, like when someone opens up oil filters and shows what they look like.
You could also check for metal particulates, flakes and so on in the existing lube, that would definitely tell you something is wearing.
I would not worry too much about it, I'm a bit "...." retentive myself, but like most others sometimes let it go, I do like following MFR instructions and or specifications when ever possible just the same.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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