Ducati Diavel
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Ducati Diavel Service Manual: 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

Shimming the crankshaft


Shimming the crankshaft


Add 0.30 Mm preload for crankshaft axial bearings to bed in correctly into their seats (inner rings seated inside outer ring).

Thus, we obtain: sa=la1+la2+0.30-La.

To calculate the thickness of each shim note that: sa=sa1+sa2 where "sa1" and "sa2" represent the shims for the clutch-side crankcase half 1 and the alternator-side crankcase half 2.

Considering the alignment of the shaft, this gives: sa1=la1+0.15-La/2; and finally, the second shim thickness: sa2=sa-sa1.

Shimming the crankshaft


Shimming the crankshaft


In addition to the above procedure, the following is a practical shimming method, providing a guide on how to calculate the crankshaft shim thickness accurately.

Install a shim of minimum thickness (1.90 Mm) on each side of the crankshaft to prevent contact between the crankshaft web and the crankcase.

Install the crankshaft and assemble the two crankcase halves.

Fit four m8 screws in the seats indicated in figure and tighten them to a torque of 19 nm (min. 17 Nm - max. 21 Nm) (sect. 3 - 3, Engine torque settings).

Shimming the crankshaft


Place a dial gauge (c) with magnetic base on a support plate fixed to crankcase.

Bring the stylus into contact with the end of the crankshaft and set the dial gauge to zero in this position.

Shimming the crankshaft


Place a lever (d) between crankcase and crank web of the crankshaft pushing towards dial gauge.

Note on the dial gauge the total clearance and add a preload of (0.30 Mm) plus the thickness of the shims used (1.90X2=3.8 Mm).

Divide the resulting value by two to obtain the thickness of the shim packs to be installed at either end of the crankshaft.

Note

After assembling the crankcase halves, the crankshaft should turn with some interference in the new bearings.

Shimming the crankshaft


Shimming the gearbox shafts

The following thickness spacers are supplied as spare parts.


Shimming the gearbox selector drum

The following thickness spacers are supplied as spare parts.


Reassembly of the crankcase halves
The crankcase halves must be in good condition and perfectly clean. The mating surfaces must be perfectly flat and free from burrs. Overhauling the alternator-side crankcase half The following pa ...

Reassembly of the crankcase halves
If removed, apply threadlocker on the screw (36), insert it with the washer (37) on the crankcase half and tighten it to The torque of 8 nm (min. 7 Nm - max. 9 Nm) (sect. 3 - 3, Engine torque sett ...

Other materials:

Removal of the throttle twistgrip
Peel back the rubber sleeve (a) protecting the throttle control cables. Undo the screws (b) of the throttle grip (6) and open the command. Disconnect the throttle grip cables (10) by unhooking the cable ends (c) from their seats. Remove the throttle twistgrip (6) from the handlebar. ...

Gearchange mechanism
Gearchange pedal Bush Rubber pad Pin O-ring Gearchange lever tie-rod Screw Gearchange lever Washer Screw Ball joint Nut Nut Nut with left-hand thread Lh ball joint Spare parts catalogue Diavel abs l.H. Footrests Diavel carbon abs l.H. Footrests Important B ...

Refitting the gear selector lever
Position the gearbox drum selector fork in the centre of the gear rollers. Position the gear selector lever (21) together with control shaft, spring and plate into the chain-side crankcase half. Insert the screws (18) and (20) with the spacer (19). Temporarily fit gear change lever (or a ...

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