Include the filter. As others have said half fill with oil before fitting. And don't panic about priming, losing pressure etc, just do it and don't leave the filter off for hours! When I spoke to the boys at Techniques, this was years ago, they only had an issue once and that was because the filter, out of necessity had to be left off overnight.
Last edited by PHZI; 06/03/25 08:04 AM.
