Shimming The Shafts - Ducati Monster 796 Workshop Manual

Crankcase assembly: crankcase halves
- gearbox secondary shaft bearing (15): apply grease to the bearing rollers. Fit the inner race (A) removed previously from
the bearing. Apply grease to the inner ring;
- the primary shaft bearing (14), secured with screws (18) and retaining spacer (17): apply the recommended threadlocker
to the screws (18) and tighten them to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm) (Sect. 3 - 3,
settings).
- the roller bearing (21) with retaining circlip (6) installed in correspondence with the end of the timing belt driveshaft.
Refitting the alternator-side crankcase half
The following parts must be present on the internal side of the crankcase half:
- the double race ball bearing (10) supporting the selector fork shaft.
Apply threadlocker to the screws (8). Fit the retaining plate (9) to the gearbox secondary shaft bearing (10) screwing the
screws (8) fully into the chain-side crankcase half.
Note
The bearing retaining plate must be positioned so that the countersunk side is facing upwards.
Tighten the screws (8) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm) (Sect. 3 - 3,
The gearbox primary shaft end bearing (12) with the inner spacer (13): apply grease to the bearing rollers.
Fit the inner race (B) removed previously from the bearing. Apply grease to the inner race.
The main bearing (4).
The ball bearing (7) with circlip (6), in correspondence with the timing belt driveshaft, oriented so that the closed side of
the plastic roller cage faces the crankcase half.
Note
Bearings do not have a specific mounting position (except main bearings); however it is good practice to install the
bearings so that side bearing the writing is facing upwards.

Shimming the shafts

Before assembling the crankcase halves, calculate the shims required to obtain the correct end float of the crankshaft and
gearbox shafts.
To determine the correct shim thickness proceed as follows.
Shimming the crankshaft
After fitting the new main bearings, proceed as follows to determine the total shim thickness "SA":
measure the distance "LA" between the bearing contact surfaces on the crankshaft;
measure the depths "LA1" and "LA2" corresponding to the distance between contact surface of the crankcase half and the
contact surface of the inner race of the bearings.
add a preload of 0.30 mm to help seat the axial load crankshaft bearings correctly, then insert the inner race in the outer
ring.
Thus, we obtain:
SA=LA1+LA2+0.30-LA.
Engine torque
Engine torque settings).