Machines From 2002 - Stihl MS 290 Manual

11.5.2 Machines from 2002

– Drain the fuel tank.
– Clean loose dirt from the air filter
and the area around it.
– Remove the air filter, b 11.1
: Pull tank vent valve (1) out of the
retainer (2) and off the hose (3).
: Connect vacuum pump
0000 850 3501 (1) with hose to
tank vent (2).
MS 290, MS 310, MS 390
– Use vacuum pump to subject
tank vent valve to vacuum.
Equalization of pressure in the fuel
2
tank takes place via the tank vent
valve. There must be no build-up of
3
vacuum during the test. In the event
of a malfunction, install a new tank
1
vent.
: Pry the hose off the engine
housing nipple.
1
: Pry the grommet (1) out of the
handle housing.
: Take the hose (2) out of the
retainer (arrow).
– Remove the hose.
Clean the hose with compressed air
and a little standard solvent-based
degreasant containing no
chlorinated or halogenated
hydrocarbons, b 13.
Inspect components for damage
and cracks and replace if
necessary.
Install in the reverse sequence.
: Position the hose (1) behind the
grommet (2).
Fit the tank vent in the grommet so
that its stub points upwards.
Make sure the hoses are not kinked.
Install all other parts in the reverse
sequence.
2
1
2
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