what does volvo recomend as PAS fluid ?
If I was suffering from debris in the system I'd be ripping the pump off & the pipes etc & soakin' em in solvent........ I knackered a decent V12 Jag many moons ago, buying a 2nd hand oil cooler off some herbert & finding out too late it was full of swarf
Mind you I've broken at least one of most things I own