I had a Power Gear jack system which would puke out at least twice that much ATF in the passenger side rear pad. Mine was on a '94 Bounder. Every time I tried to deploy that jack, the pad would end up with lots of ATF in it. So, not having a lot of money at the time (retired 8 years early), I bought ATF Stop Leak and poured it in the jack tank. And after 2.5 cans of Stop Leak over a few weeks after I saw it did some good initially...it stopped leaking! Just like in the name! I was stoked.
So for the next 12 years I owned that RV, periodically I'd need to add a can of stop leak. Like once or sometimes twice per year. Especially if I'd tried to park on a slope and that jack was extended too far. But the home made 2" thick landing pads I started to put under the jacks helped prevent that. And of course, I learned to avoid RV spaces that were too off level.
I always intended to remove that jack and take it to a hydraulic shop for rebuild (which is typically under $100) but never made it. Pad was nice and dry when I finally sold that RV. The other jacks in that set never leaked.
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