Husqvarna TE 250 - 310 2011 I.E. Workshop Manual page 197

Diagram "A"
Diagram "B"
Ed. 07-2010
ENGINE REASSEMBLY
Refit the camshaft covers (6) and tighten the screws (7) in a cross sequence
and shown in diagram "B". Make sure to fit the screws in the correct position
according to their length (see diagrams "A" and "B").
7a= M6x35 Allen screw
7b= M6x30 Allen screw
7c= M6x25 Allen screw
7d= M5x30 Allen screw
Turn the crankshaft manually a few turns to check for free, smooth rotation without
any tight points, then bring it back to Top Dead Centre position.
Use a feeler gauge (8) to check clearance between valve buckets and cam
lobes.
Correct values are as follows:
- intake: .................................................................................. 15 hundredths
- exhaust: .............................................................................. 20 hundredths.
If the value is outside the limit, remove the covers and replace the shims under
the valve buckets with shims of the appropriate size so as to achieve correct
clearance.
Replacement shims are available in a 1.60 mm to 2.60 mm thickness range, in
0.05 mm increments.
Thickness (S) of the new shim is determined as follows:
S= (G1-G)+S1
S= Thickness of new shim
G1= Measured valve clearance
G= Specified valve clearance
S1= Thickness of old shim
On assembly, check the timing of the camshaft gears and measure valve clear-
ance again.
H.47