Piaggio Fly 4T servicemanual - Scootergrisen
Piaggio Fly 4T servicemanual - Scootergrisen
Piaggio Fly 4T servicemanual - Scootergrisen
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Engine MSS <strong>Fly</strong> 50 <strong>4T</strong><br />
- Support the crankcase on a surface and place it<br />
with the driving shaft axle in a vertical position.<br />
- Warm the crankcase at ~ 120° C with a thermal<br />
gun (and support).<br />
- Fit the punch with guide and adaptor, place the<br />
bearing on the punch using grease (to keep it from<br />
falling).<br />
-Insert the bearing in the crankcase; if needed, use<br />
a mallet but do so with extreme care so as not to<br />
damage the engine crankcase limit stop.<br />
Specific tooling<br />
020359Y 42x47-mm Adaptor<br />
020364Y 25-mm guide<br />
020376Y Adaptor handle<br />
020360Y 52x55-mm Adaptor<br />
Inspecting the crankshaft alignment<br />
- Install the crankshaft on the support and measure<br />
the displacement at the 4 points shown in the fig-<br />
ure.<br />
N.B.<br />
IF VALUES OTHER THAN THOSE ALLOWED ARE DETEC-<br />
TED, TRY STRAIGHTENING THE CRANKSHAFT BY IN-<br />
SERTING A WOODEN WEDGE BETWEEN THE HALF<br />
SHAFTS OR BY CLOSING THEM WITH A VICE AS NEE-<br />
DED. IF EVEN AFTER THIS OPERATION THE VALUES ARE<br />
NOT THOSE ADMITTED, REPLACE THE CRANKSHAFT.<br />
Characteristic<br />
Off-line maximum admitted - A<br />
0.15 mm<br />
Off-line maximum admitted - B<br />
0.02 mm<br />
Off-line maximum admitted - C<br />
0.02 mm<br />
Off-line maximum admitted - D<br />
0.10 mm<br />
- Check that the driving shaft cone, the tab seat, the oil seal capacity, the toothed gear and the threaded<br />
tangs are in good working order.<br />
- In case of failures, replace the crankshaft.<br />
Specific tooling<br />
ENG - 106
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