50 – English
PISTON and CYLINDER
Pressure testing
The following parts must be removed to pressure test the
crankcase and cylinder:
• Air lter and carburettor. See page 32.
Carry out pressure testing as follows:
1. Fit both cover plate 502 52 48-01 with bolt on the
intake manifold. See g. 16.
Fit rubber plate 502 54 22-02 between cylinder and
mufer. Cover the exhaust port. See g. 17.
2. Connect preasure test tool 531 03 06-23 to tool
502 84 40-02 tted instead of spark plug. See
g. 18. The decompression valve should be closed.
3. Pump up the pressure to 80 kPa (0.8 bar).
4. Wait 30 seconds.
5. The pressure must not fall below 60 kPa (0.6 bar).
6. Leakage can occur in the decompression valve and
crankshaft seals.
7. Pressure test the decompression valve as follows.
Se also g. 19.
A. Connect preasure test tool 531 03 06-23 to the
decompression valve.
B. Pump up the pressure to 80 kPa (0.8 bar).
C. Wait 30 seconds.
D. The pressure must not fall below 60 kPa (0.6 bar).
8. Assemble the following parts:
• Carburettor.
• Cylinder cover. See the Operator's Manual.
• Chain and bar. See the Operator's Manual.
Fig. 16
Fig. 17
Fig. 18
Ax2
Bx2
Fig. 19
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