Overhauling The Crankcase Halves - Ducati MONSTER 821 Workshop Manual

Overhauling the crankcase halves

Remove the engine from the frame
Remove the external belt covers
Remove the timing belts
Remove the timing pulleys
Remove the timing gears
Remove the complete cylinder head assembly
Remove the complete cylinder/piston assembly
Remove the water pump
Remove the generator side cover
flywheel/generator assembly).
Remove the starter motor idler gear
Remove the starter motor
Remove the clutch cover
Remove the clutch unit (Removing the
Remove the oil pump (Removing the oil
Remove the primary drive gear
Remove the oil filter (Changing the engine oil and filter
Remove the gearchange mechanism
Separate the crankcase halves
Visually inspect the crankcase halves (12) and (13).
Important
If crankcase halves have to be replaced, they are supplied as a new spare part set.
Check that the surfaces of the crankcase halves are perfectly flat using a reference surface.
Warning
When overhauling an engine it is good practice to replace all the crankcase bearings.
Replace secondary shaft end bearings (16) and (17)
Replace timing layshaft bearings (18) and (19) after having removed the O-rings (14) and (15).
Replace primary shaft bearings (20) and (21).
When refitting bearing (16), make sure that the side with the writings is facing upwards (visible).
When refitting bearing (18), aim cage closed side towards the crankcase.
(Removing the
(Removing the timing belt external
(Removing the mobile tensioner/timing
(Disassembling the timing shaft
(Removing the timing
gears).
(Removing the cylinder
(Removing the cylinder/piston
(Removing the water
pump).
(Removing the generator
(Removing the starter motor idler
(Removing the starter
motor).
(Removing the clutch
cover).
clutch).
pump).
(Removing the primary drive
(Removing the starter motor idler
(Separating the crankcase
engine).
covers).
belt).
pulleys).
heads).
cover) and the complete generator
gear).
gear).
cartridge).
gear).
halves).
1137
assembly).
(Removing the
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