Cylinder - Pressure Testing - Husqvarna 340 Workshop Manual

7
1
3
Fit the cylinder bolts, tightening them in diagonal
pairs to a torque of 8–10 Nm.
8
Pressure test the cylinder.
9
Fit the spark plug and tighten to a torque of 15 Nm.
10
Fit the carburettor (see page 33).
11
Fit the silencer, tightening the bolts to a torque of
8–10 Nm.
12
Fit the cylinder cover, tightening the bolts to a
torque of 2–3 Nm where applicable.
NOTE!
If a new piston or cylinder has been fitted
the saw must be run for the first 3–4
hours with carburettor adjusted to the
factory settings.
Cylinder – pressure testing
4
2
• Loosen the carburettor bolts so that the carbu-
rettor can be moved back about 4 mm. Insert
cover plate 502 54 11-02 between the carburet-
tor and the carburettor flange. Tighten the
carburettor bolts to a torque of 1–1.5 Nm.
• Loosen the silencer bolts so that the silencer
can be moved back about 4 mm. Insert cover
plate 502 54 11-02 between the silencer and the
exhaust flange on the cylinder flange. Tighten
the silencer bolts to a torque of 8–10 Nm.
• Unscrew and remove the spark plug. Screw in
pressure test nipple 503 84 40-02. Connect tool
502 50 38-01 to the nipple. The decompression
valve must be closed. For instructions on testing
the decompression valve see page 41.
• Pump up the pressure to 80 kPa (0.8 bar).
• Wait 30 seconds.
• The pressure should not be less than 60 kPa
(0.6 bar).
• Remove the cover plates from the silencer and
carburettor, tighten the bolts to the specified
torque. Remove the pressure test nipple 503 84
40-02 and refit the spark plug.
!
Repair instructions
WARNING!
After pressure testing the cylin-
der, check that the inlet manifold
is seated correctly, otherwise the
saw may be damaged.
43
English –