Husqvarna SMS4, Workshop Manual

Page: 112 / 136

F2.4 Part. N. 8000 H4704 (07-2010)
01
02
03
MAINTENANCE
VALVE CLEARANCE ADJUSTMENT
Valve clearance shall be adjusted with cold engine, at ambient •
temperature.
When measuring or adjusting valve clearance, the piston •
shall be set at Top Dead Centre (TDC) during the compres-
sion stroke.
The following procedure applies to all valves. •
Remove: 1.
Cylinder head cover •
Cylinder head cover gasket. •
Refer to "CYLINDER HEAD".
Remove the cylinder head cover by sliding it off the chassis •
tubes.
Remove: 2.
Timing mark access screw " • 1 ".
Crankshaft end access screw " • 2 ". (see fig.01)
Measure: 3.
Valve clearance •
Valve clearance (with cold engine)
Intake • ......... 0.10-0.14 mm (0.0039-0.0055 in)
Exhaust • ......... 0.20-0.24 mm (0.0079-0.0094 in)
Not conforming to specs Adjust.
Turn crankshaft counter clockwise.
a.
Align TDC reference "
b.
a " on generator rotor to fixed reference
mark " b " onto generator cover. (see fig.02)
Ensure camshaft lobes are positioned as shown. (see fig.03)
c.