Piston And Cylinder - Husqvarna 371XP Workshop Manual

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Pressure testing
In order to carry out pressure testing on the crankcase and
cylinder, the following components should be removed:
• Carburettor. See page 28.
• Silencer. See page 14.
Carry out pressure testing as follows:
1. Fit cover plates 502 54 05-01 and 502 71 39-01 to the
inlet manifold and exhaust port. See figs. 12 and 13.
2. Connect tool 502 50 38-01 to the cover plate on the inlet
manifold. See fig. 14. The decompression valve should
be closed.
3. Close off the pipe to the impulse channel.
4. Pump up the pressure to 80 kPa (0.8 bar).
5. Wait 30 seconds.
6. The pressure should not be less than 60 kPa (0.6 bar).
7. Leakage can occur from the decompression valve and
from the crankshaft seals.
8. Refit the following components:
• Carburettor. See page 31.
• Silencer. See page 14.
40 – English

PISTON AND CYLINDER

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Fig. 12
Fig. 13
Fig. 14