Removing And Installing - Stihl MS 240 Instruction Manual

1
: Pull the fuel hose (1) off the stub
(arrow).
: Push the nipple (1)
0000 855 9200 into the fuel hose
(arrow).
Vacuum test
1
: Push the ring (1) to the left and
connect the pump (2)
0000 850 1300 to the nipple
(arrow) – subject the fuel tank to
a vacuum.
MS 240, MS 260, MS 260 C
Equalization of pressure takes
place via the tank vent. There must
be no buildup of vacuum in the tank.
– Clean the area around the tank
vent.
– If necessary, install a new tank
vent or tank, b 14.7 or b 14.8.3
Pressure test
1
: Push the ring (1) to the right and
connect the pump (2)
0000 850 1300 to the nipple
(arrow)
– pressurize the fuel tank.
– Operate the pump (2) until the
pressure gauge indicates a
pressure of 0.5 bar. If this
pressure remains constant for at
least 20 seconds, the tank,
2
including the tank vent, is airtight.
If the pressure drops, the leak
must be located and the faulty
part replaced.
– Reassemble in the reverse
sequence.

14.7.2 Removing and Installing

2
1 – Remove the carburetor box
cover, b 9.2.1
: Pry out the tank vent (1) at the
recess (arrow).
Always install a new tank vent.
– Coat sealing ring of new tank
vent (1) with STIHL press fluid,
b 17
– Press the new tank vent (1) into
the bore as far as stop.
– Reassemble all other parts in the
reverse sequence.
1
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