Arrange the bearing shells (1) on the main bearing housings
in the crankcase base (2).
Check the assembly clearance between the main journals of
the crankshaft and their bearings, proceeding as illustrated on
the following pages.
Using the tackle and hook 99360500 (1), mount the
crankshaft (2).
When fitting the gear (1) on the crankshaft (2), heat it for no
longer than 2 hours in an oven at a temperature of 180
°C.
After heating the gear (1), fit it on the shaft by applying a load
of 6000 N to it, positioning it at the distance shown in
Figure 32.
After cooling, the gear must have no axial movement under
a load of 29100 N.
If changing the pin (3), after fitting it on, check it protrudes
from the crankshaft as shown in the figure.
73534
47579
47578
49021
Mount the oil nozzles (2), making the grub screw match the
hole (3) on the crankcase.
Arrange the bearing shells (1) on the main bearing housings.
Replacing the timing gear
and oil pump
Check that the toothing of the gear is neither damaged nor
worn; if it is, take it out with an appropriate extractor and
replace it.
Checking main journal assembly
clearance
Figure 32
Figure 33
Figure 34
Figure 35
26
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS