Oil Seals - Stihl MS 240 Instruction Manual

8.3

Oil Seals

It is not necessary to disassemble
the engine to replace the oil seals.
Ignition side
– Remove the fan housing,
b 10.2
– Remove the flywheel, b 9.5
– Remove the generator, b 15.7
Versions with handle hearing
1
: Remove the Woodruff key (1).
1
– Free off the oil seal in its seat by
tapping it with a suitable tube or a
punch.
: Apply puller (1) 5910 890 4400
with No. 3.1 jaws 0000 893 3706.
MS 240, MS 260, MS 260 C
– Clamp the puller arms.
– Pull out the oil seal.
Take care not to damage the
crankshaft stub.
– Clean the sealing face with a little
standard solvent-based
degreasant containing no
chlorinated or halogenated
hydrocarbons.
– Lubricate sealing lips of new oil
seal with grease, b 17
1
– Apply a thin coating of sealant to
the outside diameter of the oil
seal (1), b 17
– Slip the oil seal (1), open side
facing the crankcase, over the
crankshaft stub.
: Use press sleeve (2)
1121 893 2400 to install the oil
seal (1).
The seating face must be flat and
free from burrs.
– Wait about one minute, then
rotate the crankshaft several
times.
Clean the crankshaft with a little
standard commercial solvent-based
degreasant containing no
chlorinated or halogenated
hydrocarbons.
1
: Install the Woodruff key (1) – its
straight side (arrow) must be in
line with the taper.
– Reassemble all other parts in the
reverse sequence.
Clutch side
– Remove the sprocket cover and
cutting attachment, b 5
2
– Remove the clutch, b 6
– Remove the oil pump,
adjustable, b 13.5,
non-adjustable, b 13.4
2
1
: Remove the washer (1) and
ring (2).
35