Valves, Checking - Husqvarna FC 250 2016 Repair Manual

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17 .4.21

valves, checking

Remove the valve spring retainer and valve springs.
Mark the valve springs according to their normal built-in posi­
tion.
Pull the valve down out of the valve guide.
Remove valve stem seal
I
Valve stem seals plier (77229010000)
Remove valve spring seat
Mark the valves corresponding to their installation position.
Info
Place the valves in a carton corresponding to their
installation position and label them.
300117-10
Check the valve plate for run-out.
Valve - run-out
At the valve plate
If the measured value does not meet specifications:
- Change the valve.
310437-10
Check sealing seat
If the sealing surface is damaged or worn:
Machine the valve seat.
302809-10
8
with the special tool.
(� p. 291)
0.
:5 0.05 mm (:5 0.002 in)
6)
on valve for damage and wear.
17 ENGINE
197