I am away from home and the manuals, but have a Capilano 1250V hydraulic steering system and do not recall a filter at all when I had the "opportunity" to repair & reroute the plumbing. Is the filter typically integral with the pump or added in-line to the plumbing?
Incidentally, bleeding the system afterwards was a time consuming pain, and a very messy lesson learned.
Power steering, not a Capilano helm.
Probably additional hydraulics too, like a thruster or hauler, net reel, etc