If you only remove the seal, you don't have anything to worry about. You can remove the pressure valve itself, and the plunger sleeve on this IP comes oot the top, too, but I'd just leave well enough alone.

Clean it off well before starting and you don't have to worry about dirt getting in it.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!