Checking The Rocker Arm Shafts; Installing The Valves - Husqvarna FS 450 2016 Repair Manual

17 ENGINE
17.4.31
17.4.32
'.i;,-6)
206
302808-10

Checking the rocker arm shafts

306609-10

Installing the valves

..
310048-10
-
Using a straightedge and the special tool, check the sealing
area of the cylinder for distortion.
I Feeler gauge (59029041100)
Cylinder/cylinder head -
sealing area distortion
If the measured value does not meet specifications:
-
Change the cylinder head.
-
G
Check sealing seat of the valves.
Valve
Intake sealing seat width
Valve
Exhaust sealing seat
width
If the measured value does not meet specifications:
-
Rework the valve seat.
-
Blow compressed air through all oil channels and check that
they are clear.
-
Check the rocker arm shafts for damage and wear.
If there is damage or wear:
-
Change the rocker arm shafts.
-
Position valve spring seats
seals@ .
Mount the valves according to their normal built-in position.
-
Mount the springs and spring retainers fi).
(l!!ll p. 295)
::; 0.10 mm (::; 0.0039 in)
2.00 mm (0.0787 in)
2.00 mm (0.0787 in)
1
O.
Mount the new valve stem