Husqvarna TE 250 2008-I.E. Merkmale, Gebrauch, Wartung Seite 179

Cap10_GB 9-07-2007 16:35
VALVE SPRING
The weakening of the springs causes a decrease of the engine
power and it aften is responsible of the noise and the vibra-
tions coming from the valves.
In this case, check the free length "L". When the working lim-
it indicated has been overcomed, replace the springs.
"L" new spring = 35 mm/ 1.38 in. (250); 43,4 mm/ 1.71 in.
(450-510)
Service limit: 33 mm/ 1.3 in. (250); 41 mm/ 1.6 in. (450-
510)
NOTE:
Replace all the spring valves when even one of these has over-
comed the the working limit.
Check the spring valve squareness. Error limit not above 1.5
mm (0.059 in.) on each side.
Pagina 77
CAMSHAFT
Check that cam surfaces are scored, stepped, grooved etc.
Insert the camshaft between two references and then check de-
viation using two comparators.
Wear limit: 0.0039 in.
Check that the cams are in good conditions, without wear or
deformation.
Cam height "H"
INTAKE (new) = 36,57 mm/ 1.44 in.
EXHAUST (new) = 35,94 mm/ 1.41 in.
77