Valve - Stihl MS 290 Manual

– If necessary, flush out the oil
tank.
Dispose of cleaning solution
properly in accordance with local
environmental requirements.
Install in the reverse sequence.
– Coat flange on suction hose
with a little STIHL Press Fluid
OH 723, b 13.
: Carefully push the suction hose
flange into the engine housing.
Install all other parts in the reverse
sequence.
MS 290, MS 310, MS 390
10.2

Valve

A valve is installed in the tank wall to
keep internal tank pressure equal to
atmospheric pressure.
Cleaning the valve
– Drain the oil tank.
– Remove the cutting attachment.
Collect chain oil in a clean
container. If necessary, dispose of it
properly at an approved disposal
site.
– Observe safety precautions,
b 2.
– Blow the valve (1) clear with
compressed air (from outside to
inside of tank).
– Flush out the oil tank.
Replacing the valve
– Collect chain oil in a clean
container. If necessary, dispose
of it properly at an approved
disposal site.
: Use a 7 mm drift the carefully
drive the valve out of its seat and
into the engine housing.
– Remove the faulty valve from
inside the tank.
: Use a 7 mm drift to carefully
press home the new valve until it
is about 1 mm below the housing
face ('a' in illustration).
Reassemble all other parts in the
reverse sequence.
a
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