I'm reasonably sure the Disco2 has the same jack as the Disco 1 -
There have been a number of threads about re-building the top and bottom seals.
However, it may be that your jack only needs a refill ( look in the oil section at many auto places) and a tighten of the pump pedestal ( Circled in the green). Two of my Disco Jacks leaked here. The solution was to unclip the linkage and, using a big spanner or shifter giving the top section about 1/12th a turn/half a flat. The washer is metal not rubber here, so I don't know why it has leaked at that point. Also, sometimes air pressure builds up in the reservoir, and you have to gently massage the rubber bung to let the air out. ( If you re-fill, tread carefully removing the bung as a replacement can be hard to find).


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