Peter, many thanks for your reply. I intend to remove the whole system as it all needs work perfectly if it is to do what is itended. Not that I have any great love of centralised lubrication systems - blockages/kinked pipes/air leaks mean that it has to be perfect to ensure that things get where they're meant to go!! I prefer a recorded regular greasing/oiling session.The rack shows no play and does not stiffen on either lock, so it may be in good condition but I will run it on oil rather than gease. I just hope the nipples will not leak at the ball as this will some defeat the object, I may try bedding the ball in a little more firmly and test to see it they leak rather than fit them and then have to deal with the leak/s.
Before getting your reply I was thinking that I may be reading on unholy ground, but I'm pleased to hear that it makes sense to others out there.
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