Inspecting The Crankshaft Alignment; Max Admissible Displacement: - Gilera Nexus 500 Workshop Manual

Engine
- 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
Specification
- Check that the driving shaft cone, the tab seat, the oil seal capacity, the toothed gear and the threaded
tangs are in good working order.
ENG - 166
STANDARD DIAMETER
Cat. 1
Cat. 2

MAX ADMISSIBLE DISPLACEMENT:

A
B
C
D
Nexus 500
Desc./Quantity
40.010 ÷ 40.016
40.016 ÷ 40.022
Desc./Quantity
= 0.15 mm
= 0.01 mm
= 0.01 mm
= 0.10 mm