Husqvarna 343R, 345RX, 343F, 345FX, 345FXT manual Decompression valve, Cylinder and piston

Cylinder and piston 6

Dismantle the piston.

502 52 42-01

Decompression valve

Dismantle the decompression valve.

Check that the non-return valve (A) is tight under a vacuum of – 50 kPa.

Otherwise replace the valve.

NOTE!

Turn the valve the right way when fitting.

531 03 06-23

Clean the decompression valve and check that the valve head is not dam- aged (burnt) and that the valve oper- ates easily.

If necessary, grind the valve with fine- grained valve grinding compound.

Push the gudgeon pin from the piston using punch 502 52 42-01.

If the pin is too tight, carefully warm the piston.

Decompression valve

Remove the bolt (A) and the hose (B) that connect the decompression valve to the nipple on the cylinder.

Unscrew the valve from the cylinder.

Inside the rubber sleeve on the nipple in the cylinder is a non-return valve (A).

Check with pressure gauge 531 03 06-23.

Pump up a vacuum of – 50 kPa. The valve must be fully tight. Otherwise replace the valve.

NOTE!

When the valve is fitted the small hole must face outwards.

Clean the decompression valve with white spirit or thinner and blow dry with compressed air.

Check that the valve moves easily in the guide and that the valve head is not damaged (burnt).

If necessary, grind the valve into the seat using fine-grained valve grinding compound.

Tip!

Use washer no. 502 54 11-01 as a friction lining against the valve head when grinding.

Fit the decompression valve in the cylinder.

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