S&S Cycle Pinion Shafts for Big Twin - Manual (Page 6)

1. 1954 to early 1981 big twin or S&S ® SE or L
style flywheels and 33-2024 - No thrust
washers are normally used. Typical bearing
arrangement - bearings against flywheel and
snap ring. See Figure 7.
2. 1981 to 1986 big twin flywheels - Two .050"
thrust washers are normally used. Typical
arrangement - .050" washer, bearing cage,
050" washer, and snap ring. See Figure 8.
3. 1987 to1989 big twin or S&S SL or BL flywheels
for 1981 and later, and S&S pinion shaft 33-
2027 - No thrust washers are normally used.
Typical arrangement - Bearing cage against
flywheel, and snap ring directly against
bearing cage. See Figure 9.
11. Install flywheel assembly in driveside crankcase.
Temporarily install camside crankcase. Check to be
sure pinion bearing rollers are fully supported by
bearing race. Adjust bearing spacing as needed.
NOTES:
●
Final placement of flywheel thrust washers is
determined by position of main bearings in main
bearing race. Main bearings should be spaced so
rollers are completely supported by race surface.
● Thin thrust washers placed between flywheel and
bearing cage will sometimes drop between flywheel
collar and bearing surface of pinion shaft. A slightly
thicker thrust washer will usually solve this problem.
Also, thrust washers normally have a larger inside
chamfer on one side of washer than on other side.
Placing smaller chamfer toward bearing cage will help
minimize this problem. Thrust washers of various
thickness can be obtained from local bearing houses.
Custom thickness thrust washers can be made by
surface grinding a thicker thrust washer.
12. Final assemble crankcases.
13. Install oil pump drive gear, spacer, and pinion gear on
pinion shaft. Apply Loctite ® to threads of pinion gear
nut and torque to 45 ft-lb.
6
Bearings
Snap Ring
#33-2027 Pinion Shaft
1987 And Later Style Flywheels
1994 And Later Style Bearings
Flywheel
Collar
Figure 9
Figure 7
.050"
Thrust
Washer .050"
Thrust
Washer
Figure 8