Tank Vent; Testing - Stihl MS 192 T Manual

1
: Connect the impulse hose (1) to
the stub (arrow).
– Reassemble remaining parts in
reverse order.
Ensure that the impulse hose is
routed correctly and without kinking.
88
14.6

Tank Vent

14.6.1 Testing

A pressure equilibrium must always
prevail between the inside of the
fuel tank and the surrounding
atmosphere to permit troublefree
operation of the carburetor. This is
ensured by the tank vent.
If problems develop in the
carburetor or fuel supply, the tank
vent must always also be tested and
replaced if necessary. Correct
functioning is determined by testing
the fuel tank with negative pressure
or gauge pressure via the fuel hose.
– Remove the fan housing, b 10.2
– Drain the fuel tank.
Ensure that the fuel is disposed of
correctly and without harming the
environment.
1
: Remove the cover (1).
1
: Disconnect the fuel return line (1)
and push the double nipple (2)
0000 855 9200 into the flange
(arrow) of the suction hose.
1
Testing with negative pressure
: Close the valve (1) and connect
the vacuum pump (2)
0000 850 3501 to the double
nipple, then create a vacuum in
the fuel tank.
Pressure is equalized via the tank
vent. A negative pressure must not
build up inside the tank. The tank
vent must be replaced if this is not
the case.
– Clean the area around the tank
vent.
– Replace the tank vent or tank if
necessary, b 14.6.2 or
b 14.8.3
2
2
MS 192 T