Ducati Monster 796 - Removal of the APTC Clutch

Clutch assembly: APTC wet clutch
file:///D|/Manuales/Para%20recolocar/MOTOS/DUCATI/DUCATI/M796/wsm/EN/M796_ABS_11_9_6A.72.1.html[11/12/2015 18:40:48]
without compromising the feel of the lever to the rider (servo-assisted).
The APTC system consists essentially of a splined coupling between the two parts of the clutch drum.
This coupling exploits the axial component of driving torque (bike accelerating) or reverse-acting torque (clutch
disengaged) to produce servo-assistance in the former case and prevent rear wheel slip in the latter.
In practice, this means that under acceleration (and thus with driving torque) the clutch pack will tend to be under a
greater load (from springs initially more loaded), while during hard downshifting, the reverse-acting torque will tend to
take load off the springs thus causing the plates to slip.
Before working on the internal clutch parts, check that the clutch operates correctly. Then deal with the problem in a
systematic manner.
The following is a list of possible causes of clutch malfunctions.
A clutch which does not disengage may be caused by:
-excessive play of the control lever;
-distorted clutch plates;
-incorrect spring tension;
-faulty clutch release mechanism;
-excessive wear of the hub or clutch housing.
A clutch which slips may be caused by:
-insufficient play of the control lever;
-worn clutch plates;
-weakened springs;
-faulty clutch release mechanism;
-excessive wear of the hub or clutch drum.
A noisy clutch may be caused by:
-excessive backlash between the primary drive gears;
-damaged primary drive gear teeth;
-excessive play between friction plate tabs and the clutch drum;
-worn gear/clutch drum bearings;
-the presence of metal particles (filings) on the gear teeth.
Removal of the APTC clutch
Operations Section reference
Drain the engine oil 4 - 3, Changing the engine oil and filter
cartridge
Disconnect the oil pressure
sensor
6 - 5,
Checking the indicating devices
Remove the clutch cover 9 - 6.2,
Removal of the clutch cover
Screw the three tools 88713.2591 into the relative bores in the hub.