Stihl SR 450 - Oil Seals; Shroud

19SR 430, SR 450
To find the leak, coat the suspect
area with oil and pressurize the
engine. Bubbles will appear if a leak
exists.
– After finishing the test, push the
ring to the left to vent the pump –
disconnect the hose.
– Remove the test flange.
– Install the carburetor, b 9.5
– Loosen the screws on the muffler
and pull out the sealing plate.
– Tighten down the muffler screws
firmly.
– Reassemble all other parts in the
reverse sequence.
4.3 Oil Seals
The engine must be disassembled
to replace the oil seals.
– Remove the engine, b 4.5
– Remove the engine pan, b 4.6
– Pull the crankshaft upwards a
little but not out of the cylinder.
: Pull off the oil seals (1).
– Clean the sealing faces and
install new oil seals, b 4.6
– Install the engine pan, b 4.6
– Degrease the crankshaft taper,
b 13
– Install the engine, b 4.5
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4.4 Shroud
– Remove the starter cover, b 6.2
: Take out the screws (arrows).
: Take out the screw (1).
: Lift the shroud (1) slightly and pull
it away.
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