Gilera 633721 Workshop Manual page 171

Nexus 500 euro 3
CAUTION
THE CRANKSHAFT CAN BE REUSED WHEN THE WIDTH
FALLS WITHIN THE STANDARD VALUES AND THE SUR-
FACES 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 the 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.
Specification
Inspecting the crankshaft alignment
- Install the crankshaft on the support and measure the displacement at the 4 points shown in the figure.
Specific tooling
020074Y Support base for checking crankshaft alignment
STANDARD DIAMETER
Cat. 1
Cat. 2
Desc./Quantity
40.010 ÷ 40.016
40.016 ÷ 40.022
ENG - 171
Engine