Thanks guys for the info.
I have already purchased the seal kit from B&G (very expensive as you say). I purchased it when I first got the oil leak
as I was cruising and wanted it as a backup.
The other odd thing is that the ram leaked oil
on only one occasion when I was sailing in heavy weather
and surprisingly, it has never leaked a drop since. I am concerned that if the ram has a heavy workload again it may fail.
The oil leak
appears to be originating from the cylinder housing and not from the ram itself.
Giving the fact that I already have the seal kit on hand would you still advise taking it to a hydraulic shop?
I would like to do it myself, however, I am concerned it might be like taking my watch apart. If it is relatively simple I would like to have a go.