Clutch Spring; Valve Guide; Valve - Husqvarna TE 250-450-510/2008-I.E. Owner's Manual

Table of Contents

Available languages

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.

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-

Service limit: 0,05 mm/ 0.002 in.

New exhaust valve standard play: 0,018-0,045 mm/ 0.0007-

Service limit: 0,08 mm/ 0.003 in.

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.