Ducati Diavel Service Manual: Removal of the cooling system hoses and unions
Loosen the clips (21) that secure the radiator/thermostat sleeve (40) and the radiator/plug sleeve (24) to the water radiators.
Loosen clips (25) and (43) that secure the breather pipe (26) to the radiator/plug sleeve (24) and to the left radiator.
Loosen the clips (34) securing the thermostat assembly (38) - thermostat-cylinder head sleeve (35) - thermostat/cylinder head sleeve (37) to the cylinder heads.
Loosen the clip (28) to release the breather pipe (30) from the vertical head.
Loosen the clips (21) and (34) to disassemble the thermostat unit (38) - thermostat/head sleeve (35) - thermostat/head sleeve (37) - radiator/thermostat sleeve (40).
Loosen the clip (28) to release the breather pipe (27) from the half-casing.
Loosen the screws (32) and remove the fitting (33).
Recover the o-ring gasket (31) located between the retainer and the vertical head.
Loosen the clips (21) that secure the pump/radiator sleeve (22) and the radiator/radiator sleeve (23).
Important
Periodically check the connection hoses for leaks.
Hoses that are cracked, swollen, or hardened should be renewed.
Refitting the expansion tank
If the support (15) has been removed, place the hose clamps (14) on the
bracket (15) orienting them as indicated.
Fully press the pins (a) to block the clamps (14) until pins surfaces (b) are at ...
Refitting the cooling system hoses and unions
Position the pump/radiator sleeve (22) and the radiator/radiator sleeve (23).
Fit sleeve (23) and sleeve (22) to their corresponding fittings (n) and (o), and
bring them fully home on collars (p) ...
Other materials:
Spark plugs replacement
Check the colour of the ceramic insulation around the central electrode:
an even, light brown colour indicates the engine is in good condition and
running at the right temperature.
Inspect the centre electrode for wear and check spark plug gap, which should be:
0.8+/-0.1 Mm.
Important
...
Refitting the radiator
The reassembly procedure is the same for both radiators.
Check for the nuts with clips (8).
Refit the rh radiator (13) on the frame and tighten the screws (4) and (5)
with the spacers (6) to a torque of 10 nm
+/-10% (sect. 3 - 3, Frame torque settings).
Connect the connections of ...
Removal of the starter motor idler gear
Slide the gear pin (21) complete with the gear (19) and washer (20).
Warning
Pay attention to the washer (20) since it may fall inside the
crankcase half.
At this point, it is possible to remove the starter motor as described in
sect. 6 - 3, Starter motor. ...