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7
60
61
62
64
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Engine assembly
63
65
25 LD 330-2_425-2 Workshop Manual_cod. ED0053031690_1° ed_ rev. 00
Crankshaft
Fit the crankshaft into the crankcase using tool p.n. 00365R0910
as shown in figure 60; make sure that the bearing oil passages
are matched to the crankcase oil passages.
Torque the bearing screws (fig. 61) to :
kgm 2,2 (Nm 21,6)
Main bearings - flywheel side
Fit the bush to the bearing carriern using a special tool of
appropriate diameter as shown in figure 62. Insert the bush
arranging the groove so that it is facing the internal side of the
bearing and positioned vertically.
Fit the oil seal ring to the bearing using a suitable diameter
tubular punch.
Fit the bearing into the crankcase after having first interposed an
O-ring between the contact surfaces (fig. 63). Torque the screws
to:
kgm 2,2 ÷ 2,4 (Nm 21,6 ÷ 23,5)
Crankshaft end float
Install an 0.15 mm feeler gauge betwen the crankshaft shoulder
and the crankcase (flywheel side).
Use a screwdriver to force the crankshaft against its shoulder as
shown in figure 64. Pre-heat the timing gear to a temperature of
180 ÷ 200 °C and fit it onto the crankshaft pressing it down until
it comes into contact with the crankcase. Wait until the timing
gear has cooled down and then withdraw the feeler gauge and
the screwdriver and check end float (fig. 65), which must be
within the range:
0,10 ÷ 0,20 mm
0,20 ÷ 0,30 mm
(cast iron crankcase)
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