#380311 is the bush that the small end ball of the lever fits into. If you remove the square plate that the lever fits into you'll be able to remove it and then you will see that there is a pair of nylon cups that the large pivot ball works in. These can wear, usually the bottom one mostly I would guess. This is where I suggest the heavy grease.
#662058 Ball shell - and that should be for the upper and lower parts as a pair.
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