Stihl MS 171 Manual page 71

1
– Push the oil pump part way into
the bore.
: Push smooth pin of installer (1)
1130 into the oil pump.
: Place the installing tool (1)
1123 890 2202 in position and
push the pin into the bore (arrow).
70
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1
– Place the lever (1) of the
installing tool in the installer and
secure it with the pin (arrow).
: Use the lever (1) to press the oil
pump into the bore as far as stop.
– Remove the installing tool and
installer.
1
1
– Coat profile on oil suction hose
connector with oil, b 16
: Push home the oil suction hose
(1) until the tab is completely
flush with the guide (arrow) in the
engine housing, b 13.2
– If necessary, inspect the worm
and replace it if necessary,
b 8.3
– Install the handle frame, b 11.4
– Reassemble all other parts in the
reverse sequence.
– Tightening torques, b 3.5
13.4 Valve
A valve is installed in the tank wall to
keep internal tank pressure equal to
atmospheric pressure. The valve
must be replaced if it is very dirt or
damaged.
– Remove the chain sprocket
cover, bar and chain, b 5
– Open the oil tank cap and drain
the oil tank. Collect chain oil and
dispose of it properly, b 1
: Use a 6 mm drift to carefully drive
the valve out of its seat in the
housing and into the oil tank.
1
: Remove the old valve (1) from
the oil tank.
MS 171, MS 181, MS 211