Versions of center nut for drive shaft which may occur

Fig 1: Identifying Versions Of Center Nut For Drive Shaft

Courtesy of VOLVO CARS OF NORTH AMERICA.

-1997:

A: Lock nut with separate curved spring washer.

If the lock nut with spring washer has already been replaced, version B2 or B3 (without separate spring washer) may occur.

1998 - 2000:

B1: Black flanged lock nut, (open head).

If version B1 has already been replaced, version B2 or B3 may occur.

B2: Black flanged lock nut (black washer), P/N 920 0250.

B3: Black (service) flanged lock nut (black washer with tab), P/N 3088 4229.

NOTE:

If the lock nut mentioned in B1, B2 or B3 has been installed, and if it is loose or has been replaced during a repair, version (C) must be used.

2001-:

C: Yellow flanged lock nut (black washer), P/N 3089 6406.