C:06:04
GUDGEON PINS-TOOLING
The gudgeon pins are a press fit in the small ends
and free turning in the pistons.
Use tooling J 28854 which is supplied in a box
containing
piston supporting block
an extraction mandrel
piston thrust collar
inserting mandrels and guides.
We approved the use of an electric hot plate to
make gudgeon pin insertion easy. The required
temperature of 250°C is restricted to small end
zone
only
(Fig. 55)
EXTRACTING GUDGEON PINS
Rest the piston in the vee on the support base,
with
the gudgeon pin over the extraction hole.
Press out the piston with the extracting mandrel
IB).
(Fig. 56)
Engine
INSERTING GUDGEON PINS
Preparing the connecting rods. Check the rods for
truth (twist
—out
of square).
Selecting the bottom end components by cylinder
bank.
The connecting rod big-ends are offset and have
an extended flange
(E)
on one side (counter
balanced side) in order that a pair of connecting
rods can share a common crank pin. (Fig. 57)
ALIGNING THE PISTONS
All six pistons will be laid
in
turn on support base
(A) with the arrow pointing upwards and
with
spot facing on the piston resting on tnrust pad
(C).
Connecting rod
—piston
assemblies LH
cylinder bank.
Spread the small ends on connecting rods 1-2-3
evenly round the hot plate, with extended flange
(E) face downwards.
(mi
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