PIAGGIO MP3 500 i.e. SPORT, Service Station Manual

Page: 226 / 432

-Check the surfaces that limit the axial free-play
are not scored and measure the width of the crank-
shaft between these surfaces, as shown in the
diagram.
N.B.
BE CAREFUL NOT TO LET THE MEASUREMENT BE AF-
FECTED BY THE UNIONS WITH THE CRANKSHAFT ENDS.
Characteristic
Standard dimensions:
63.6 - 63.45 mm
CAUTION
THE CRANKSHAFT CAN BE REUSED WHEN THE WIDTH FALLS WITHIN THE STANDARD VAL-
UES AND THE SURFACES ARE FREE FROM SCRATCHES.
Shimming
- Check the overall height of the crankshaft - shoulders - gear assembly.
Characteristic
Standard thickness:
71.804 - 72.000 mm
- Check that shim adjustment is free from scratches.
N.B.
IN CASE OF NEW UTILISATION, MAINTAIN THE FIRST FITTING POSITION.
Specific tooling
020074Y Support base for checking crankshaft alignment
- If the crankshaft - crankcase axial clearance is higher than the standard value and the crankshaft
exhibits no irregularity, the problem is caused by wear or by a wrong machining on the engine crankcase.
- Check the diameters of both bearings of the
crankshaft in accordance with the axes and surfa-
ces shown in the figure. Half shafts are classified
into two categories, Cat 1 and Cat. 2. Refer to the
chart below.
STANDARD DIAMETER
Specification Desc./Quantity
Cat. 1 40.010 ÷ 40.016
Cat. 2 40.016 ÷ 40.022
Inspecting the crankshaft alignment
- Install the crankshaft on the support and measure the displacement at the 4 points shown in the figure.
Engine
MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA (2015)
ENG - 226