Fitting Clearance; Check The Radial Clearance On The Connecting Rod - PIAGGIO 633929(IT) Service Station Manual

Engine

Fitting clearance

Connecting rod axial clearance 0.20 - 0.50

Check the radial clearance on the connecting rod.

Standard clearance: 0.036 ÷ 0.054 mm
-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.
Standard dimensions:
55.75 ÷ 55.90 mm
N.B.
WHEN MEASURING THE WIDTH OF THE
CRANKSHAFT, MAKE SURE THAT THE MEAS-
UREMENTS ARE NOT MODIFIED BY THE RAD-
IUSES OF FITTINGS WITH THE CRANKSHAFT
BEARINGS.
The crankshaft can be reused when the width is
within the standard values and the surfaces show
no signs of scoring.
N.B.
IN CASE OF NEW UTILISATION, MAINTAIN
THE FIRST FITTING POSITION.
If the axial clearance between crankshaft and crankcase exceeds the standard and the crankshaft does
not have any defect, the problem must be due to either excessive wear or wrong machining on the
engine crankcase.
ENG - 50
MP3 125