Iveco Motors N67 MNT M28, Техническое и ремонтное руководство

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N67 MNT M28 OVERVIEW
1.13
OCTOBER 2005
The crankshaft is made in steel hardened by induction and
rests on seven mountings; inside the hollow shaft are the
ducts for the lubrication oil circulation.
On the front tang, the oil pump driving gear, the phonic
wheel, the flywheel connecting hub and the driving pulley of
the ancillary components are keyed on.
On the rear tang the camshaft driving gear and the coupling
flange to the engine flywheel are keyed on.
The bench half bearings are in cast babbitt lining steel and
the 6
th
is fitted with a shoulder ring to contain the end play
of the driving shaft.
Details 1 and 2 in the figure, assembled by negative
allowance on the rear tang, are not replaceable. The front
and rear retaining rings are of the slide type with radial
seal and require special fixtures to be assembled and
disassembled.
Connecting Rods
They are made in steel, manufactured by pressing, with small
end oblique edged and cap separation obtained by fracture
splitting technique.
The connecting rod half bearings are cast babbitt lining
steel.
Every connecting rod is marked on the body and on the cap
by a number that identifies their coupling and the cylinder
into which it is to be assembled; moreover, a letter is impres-
sed on the body stating its weight class.
In case a replacement were necessary, only one type of
connecting rod is available as spare part of an intermediate
class weight that can be used to replace any other. Therefo-
re, connecting rods that are still efficient, do not need to be
replaced even if they are of a different class weight.
Crankshaft
1. Timing system driving gear - 2. Flywheel connecting hub - 3. Oil pump driving gear.
04_013_N
Figure 7
Figure 6
04_012_N
3
1
2