Husqvarna 1018855-26, 965030298 manual Piston And Cylinder, Pressure testing, Decompression valve

PISTON AND CYLINDER

Pressure testing

Decompression valve

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).

Crankcase and cylinder

The following parts must be removed to pressure test the crankcase and cylinder:

•Carburettor.

•Muffler.

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:	•	Carburettor.
	•	Muffler

English – 113