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Pressure testing
The following parts must be removed to
pressure test the crankcase and cylinder:
• Carburettor.
• Muffler.
PISTON AND CYLINDER
Carry out the test as follows:
1. Fit the cover plates (service tool) on the
intake manifold and exhaust port.
2. Connect tool 502 50 38-01 to the cover
plate on the intake manifold.
The decompression valve should be
closed.
3. Plug the opening to the impulse
channel.
4. Pump up the pressure to 80 kPa
(0.8 bar).
5. Wait 30 seconds.
6. The pressure should not drop below
60 kPa (0.6 bar).
7. Leakage can occur from the
decompression valve and the
crankshaft seals.
Fit the following:
Decompression valve
Crankcase and cylinder
Test the decompression valve as follows.
1. Connect the tool 502 50 38-01 to the
decompression valve
2. Pump up the pressure to 80 kPa (0.8 bar).
3. Wait 30 seconds.
4. The pressure should not drop below 60 kPa
(0.6 bar).
• Carburettor.
• Muffler
Eng, p 83-124 96-09-13, 12.59113