CARBURETTOR

Pressure testing

Pressure testing should be carried out with the carburettor fully assembled. Testing should always be carried out after the carburettor has been repaired, but a test can also be made for trouble shooting before dismantling.

!WARNING!

The fuel used in the chain saw poses the following hazards:

1.The liquid and its vapours are poisonous.

2.Can cause skin irritation.

3.Is highly inflammable.

Make the test as follows:

1.Set the high and low speed jet screws one turn open from the bottom.

2.Connect pressure tester 502 50 38-01 to the carburettor’s fuel intake.

3.Lower the carburettor into a beaker of water.

4.Pump up the pressure to 50 kPa (0.5 bar) and clamp the pump tube with the spring clip.

5.There should be no leakage. If a leakage occurs refer to the table below.

Leakage on

Fault with

 

 

Diffuser jets

Needle valve

Leakage on the

Pump diaphragm

pulse tube

 

Ventilation hole

Control diaphragm

above the metering unit

 

 

 

Refitting onto chain saw

Fit the carburettor to the chain saw and refit any other parts removed.

For tightening torques, see the ”Service data” for the saw in question.

Carburettor adjustment. See the operating instructions for the saw in question.

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Husqvarna 965030296, 965030298, 1018855-26 manual Pressure testing, Refitting onto chain saw

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