Carrying a bucket of water up a ladder is difficult for any one but unless there is a major loss of signal, I would leave it alone if you are in any doubt that you can work up there safely.
Based on those pictures, I would suggest a careful inspection of the brackets/bolts holding the assembly to that mast as they are looking decidedly rusty and that dish has quite a large wind surface which would put a fair bit of stress on that area when the breezes blow and the last thing you want is that to give way one day.
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