pag. 50
Release 00 - 02/2008
Engine WBE 0701-WBE 0704
Service manual
14. ENGINE BLOCK - Overhauling internal parts
16 - Remove the engine shaft (5), checking the
diameter of the connecting rod pin with a digital
gauge. The value must not be less than 25,92 mm
or the engine shaft will have to be replaced.
NOTE - In the case of seizing, the manifolds
can be polished with fine emery cloth, only
removing foreign matter and checking that
the final size remains within the aforementio-
ned limit.
17 - To check the alignment between the manifol-
ds and the protruding part of the shaft, place the
engine shaft on two prismatic guides (6) and, with
the help of a comparator (7) placed at the end,
check the displacement by rotating the shaft. The
shaft must be replaced if the displacement exceeds
0.10 mm.
IMPORTANT: A bent shaft must never be re-
paired!
WARNING - DANGER: A bent shaft causes ab-
normal vibrations and could be dangerous
when the machine is used!
18 - To refit the rings to the piston, first fit the three
oil scraper rings (8), then the ring with a round
edge (9
) and finally the ring with a sharp edge
(40), being careful over the markings (which must
face the piston head) and in arranging the gaps to
ensure that they are not aligned with each other.
19 - Fit the connecting rod (25), gudgeon pin (4)
and clamping rings () to the piston (27), taking
care over the connecting rod marking, which must
face the intake side, with the piston marking facing
the exhaust side.
40
9
8
4
27
25
10
20
30
40
50
60
70
80
90
5
7
6
6
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