Husqvarna 572XPG - Pressure Testing the Crankcase and Cylinder

54 - English
Troubleshooting
19.4 Pressure testing the crankcase
and cylinder
The following parts must be removed before carrying out a
pressure test of the crankcase and cylinder:
• Air lter.
• Carburettor.
Carry out a pressure test as follows:
1. Fit the cover plates on the intake manifold. See gure 4.
2. Cover the exhaust port with tool 2a. See gure 5.
3. Connect the pressure vacuum tester tool to tool Pressure
test adapter that is tted instead of spark plug. See gure 6.
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
(see gure 7):
A. Connect pressure vacuum tester tool 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.
• Chain and bar.
Fig. 4
Fig. 5
Fig. 6
Fig. 7
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