Pressure Testing The Crankcase And Cylinder - Husqvarna 565 Workshop Manual

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 filter.
• Carburettor.
Carry out a pressure test as follows:
1. Fit the cover plates on the intake manifold. See figure 4.
2. Cover the exhaust port with tool 2a. See figure 5.
3. Connect the pressure vacuum tester tool to tool
test adapter that is fitted instead of spark plug. See figure 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 figure 7):
A. Connect pressure vacuum tester tool
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.
54 - English
Fig. 4
Pressure
Fig. 5
to the
Fig. 6
Fig. 7
Troubleshooting