89MS 461, MS 461-R
Pressure test
: 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 until the
pressure gauge indicates a
pressure of 0.5 bar. If this
pressure remains constant for at
least 20 seconds, the tank,
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.
2
1
3443RA442 TG
12.8.2 Removing and Installing
– Remove the air filter cover,
b 12.1
An optional fine dust filter is
recommended in work areas with a
high level of fine dust.
: Pull off the fine dust filter (1) (if
fitted).
: Pry the tank vent (1) out of its
seat using the rib (arrow) for
leverage – always install a new
tank vent.
Installing
– Coat sealing ring of new tank
vent with STIHL press fluid,
b 15
– Push home the tank vent by hand
until it snaps into position.
– Reassemble all other parts in the
reverse sequence.
3443RA443 TG
1
1
3443RA444 TG
12.9 Fuel Intake
12.9.1 Pickup Body
Impurities gradually clog the fine
pores of the filter. This restricts the
passage of fuel and results in fuel
starvation.
In the event of problems with the
fuel supply system, always check
the fuel tank and the pickup body
first.
– Troubleshooting, b 3.6 or
b 3.7
Clean the fuel tank if necessary.
– Open the tank cap and drain the
tank.
– Pour a small amount of clean
gasoline into the tank. Close the
tank and shake the saw
vigorously.
– Open the tank again and drain it.
– Dispose of fuel properly in
accordance with environmental
requirements, b 1
– Open the tank cap.
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General
Weight and Dimensions
