Clutch Spring - Husqvarna TE 250 2008-I.E. Merkmale, Gebrauch, Wartung

Cap10_GB 9-07-2007 16:35

CLUTCH SPRING

Measure the free length "L" of each spring using a gauge.
"L" new spring = 41 mm/ 1.61 in.
Service limit: 39 mm/ 1.53 in.
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Pagina 76
VALVE GUIDE
Accurately check the valve guide. A dial comparator set in a
way to determine the play in both "X" and "Y" directions,
which are perpendicular to one another, is used to detect the
wear on the coupling between the guide and the valve.
New intake valve standard play: 0,008-0,035 mm/ 0.00031-
0.00138 in.
Service limit: 0,05 mm/ 0.002 in.
New exhaust valve standard play: 0,018-0,045 mm/ 0.0007-
0.00177 in.
Service limit: 0,08 mm/ 0.003 in.
VALVE
Check that the valve shank and the contact surface with the
valve seat are in perfect conditions. Pittings, cracks, or any oth-
er deformation or wear must not appear on these elements.
Carry out the following checks:
- deformation of the valve shank by setting the shank on a
" V" striker, and measuring the extent of the deformation by
a comparator.
Working limit: 0.05 mm (0.00197 in.).
- check the concetricity of the valve head by resting an angle
comparator against the head and then rotate the valve in a
Vee block. Wear limit:0.0012 in.