Front wheel
Check the wheel shaft for straightness.
Turn the pin on a reference surface and measure maximum distortion using a feeler gauge (see Sect. 3 - 1.1,
Front
wheel).
Maximum permissible distortion: 0.05 mm.
The surfaces of the shaft must be free of any cracks, dents, scoring or any signs of damage, however light.
Localised polished areas are permitted.
Overhaul of the front and rear rim
After you have checked the bearings, check the rim as follows.
Visually inspect the wheel for cracks, scoring and deformation; change the wheel if damaged.
Insert the shaft in the wheel and mount it on two fixed reference blocks.
Using a dial gauge, measure rim runout and out-of-round relative to the shaft axis (see Sect. 3 - 1.1,
Front
wheel).
If the values measured are not within the tolerance limits, renew the wheel.
Maximum permissible rim runout 1 mm (0.04 in.).
Maximum permissible rim runout 0.5 mm (0.02 in.).
Refitting the front wheel
When all the necessary inspections have been completed, refit the wheel as follows.
Lubricate the shank and thread of the wheel shaft (8).