Half Shafts Coupling With Half Crankcase And Brass - PIAGGIO 500 cc Service Manual

Driving shaft crankcase
- Check the brasses diameter in the 3 directions shown
in the figure.
- Repeat the measuring on the other half of the brass.
See figure.
N.B.: Do not measure the mating of the 2 half bearings
as the ends are splined to allow deformation while
being fitted
- The brasses standard diameter after the driving
changes according to the coupling selected.
- The brasses housing in the crankcases are subdi-
vided in 2 classes, as for the driving shaft Class 1 and
Class 2.
- The brasses are subdvided in 3 classes depending
on the thickness, see table below:
TYPE
A
B
C

Half shafts coupling with half crankcase and brass

Half shaft
Class
1
2
N.B.: When assembling the spare parts, use the shaft with two shoulders class 1 with crankcase FC1 (or class 2 with
crankcase FC2).
A spare crankcase cannot be used with a mixed class driving shaft. The shaft for the spare parts is provided with
half shafts of the same class.
N.B.: To replace the half crankcases, remove the coun-
tershaft bearings as described above. Remove from the
half crankcase, transmission side, the antiflapping roller
and the driven pulley assembly, as described in Chapter
3-Automatic transmission, and the hub cover with rel-
evant gears and bearings, as described in Chapter 4-
Final Reduction.
8 - 14
IDENTIFICATION
Half shaft
Class
1
2
1
2
Red
Blue
Yellow
Brass
class
B
C
A
B
Coupling
surface
THICKNESS
1.982 - 1.987
1.987 - 1.992
1.992 - 1.997
Spare crankcase
preparation
FC1
Drg. CM1033015001
FC2
Drg. CM1033015002
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