This is copied from the service manual. I've never done it but it sounds like quite a job.
Maintenance
NOTE: Some 2008 600 and 700 CFI engines were
manufactured with model year 2007 oil pumps (PNs
2520552 and 2520622). Always reference the oil
pump adjustment chart to determine the oil pump
lever setting based on the oil pump and not the
engine model year.
All service parts will be the 28mm w/Pointer oil
pumps.
3. Remove the air box, throttle body adapter plate, drive belt,
drive clutch and driven clutch from the engine
compartment.
4. Remove the rear engine torque stop plate from the bulkhead
the bulkhead.
5. Remove the 2 left-hand console mounting screws and
electrical center cover piece.
6. Remove the rear 2 lower clutch guard mounting screws and
3 forward mounting nuts and plate.
7. Remove the 3 screws securing the lower clutch guard to the
upper plate leaving the electrical center components in
place.
8. Loosen and remove the throttle body assembly and set
aside.
9. Using a mirror or a bore scope and a light, visually inspect
the current oil pump setting.
NOTE: The oil pump jam nuts can be manipulated
using the special tool set part number: PS-49001 (Oil
Pump Cable Wrenches).
10. If the oil pump lever requires adjustment or the cable is
going to be replaced, insert the two oil pump cable
wrenches between the bulkhead and the rear of the engine.
NOTE: The wrench with the large opening is
designed to fit around the cable sheath, while the
wrench with the small opening is designed to fit
around the inner cable wire.
11. When adjusting the lever, make adjustments in small
increments, then re-check the timing mark alignment.
Reference the OIL PUMP ADJUSTMENT SETTING
TABLE to verify where the oil pump lever is set in relation
to the oil pump boss index mark.
12. After setting the oil pump lever correctly, apply a small
drop of Loctite 242 to the cable barrel threads, then secure
the jam nuts.
13. Re-check the oil pump alignment marks after securing the
jam nuts to verify the marks are set correctly.
14. Re-assemble the removed components in the reverse they
were removed. Reference the appropriate service manual
chapter for component assembly fastener torques.
CAUTION
Failure to properly set the oil pump lever arm may cause
severe engine damage.
CAUTION
The oil pump lever and pump boss marks must be observed
straight-on to yield accurate results.
