Well, if the Accumsump is only a quart, then I see no issue, just put extra oil in it. But if it's a 2- or 3-quart, it's still quite manageable:
1. Make sure the Accusump valve is closed. Open the oil drain, empty the crankcase.
2. When drained, crack open the Accusump valve and drain that.
3. Change/clean filter/screen.
4. Close up engine, add engine oil capacity plus 1/2 quart*. Note level on dipstick (should indicate slightly above full).
5. Close the Accusump valve. Start engine, watch for oil pressure. Count to 10 and then turn off engine. This will ensure the engine and filter are filled with oil.
6. Verify oil level at or below full; if so, add one quart. If above full, proceed to next step.
7. Restart engine. Open the Accusump valve; monitor oil pressure while counting to 10 and then close the Accusump valve. Turn off engine. This adds oil to the Accusump, but possibly only partially.
8. Add oil to the prior level noted on the dipstick, or total amount of calculated fluid capacity**, whichever is lower.
9. Repeat #7 until total fluid capacity reached. Verify on dipstick.
10. Restart engine, raise RPM to ~2000 for 5 seconds then close the Accusump valve.
11. Check final oil level and adjust as needed.
And for Pete's sake, don't forget to close the valve before each shutdown.
GA, who is not a big fan of Accusumps...but understand why they exist (I'm running dry sump on the race rocket)
*For Froggy:
- Stock capacity, 3.7 quarts with filter.
- Add 1/2 quart(reference?) if you have a tuna can:
http://www.pelicanparts.com/More_Info/PEL-PP910049.htm- Add 1.5 quarts if you have an extended oil pan:
http://www.pelicanparts.com/More_Info/OC-DSK-001.htm**Total capacity = the above capacity* plus capacity of the Accusump. Don't worry about the capacity of the line.