6.3 Oil Seals; Ignition Side - Stihl MS 231 Manual

6.3 Oil Seals
2
1
Use soft oil seal (1) 9638 003 1581
with snap ring for replacement on
closed engine.
Use hard oil seal (2) 9639 003 951
without snap ring for replacement
on opened engine.
Install the soft oil seal with the snap
ring facing outwards and the hard oil
seal with its open side facing the
ball bearing.
It is not necessary to disassemble
the engine to replace the oil seals.
Use the correct jaws when
removing the oil seals with puller
5910 890 4400.
Soft oil seal with snap ring –
jaws (No. 3.1) 0000 893 3706.
Hard oil seal without snap ring –
jaws (No. 6) 0000 893 3711.
MS 231, MS 231 C, MS 251, MS 251 C
All manuals and user guides at all-guides.com
6.3.1

Ignition side

– Remove the fan housing, b 8.2
– Remove the flywheel, b 7.6
1
Take care not to damage the
crankshaft stub.
– Free off the oil seal in its seat by
tapping it with a suitable tube or a
punch.
: Apply puller (1) 5910 890 4400.
– Clamp the puller arms.
– Pull out the oil seal.
Installing
– Clean the sealing face, b 14
– Lubricate sealing lips of new oil
seal with grease, b 14
2
1
: Fit the installing sleeve (1)
1141 893 4600.
: Slip the oil seal (2), snap ring
facing outwards, over the
installing sleeve.
– Remove the installing sleeve (1).
1
2
: Fit press sleeve (2)
1122 893 2405 with the
collar (arrow) facing the engine.
: Use press sleeve (2)
1122 893 2405 to install the oil
seal (1).
The seating face must be flat and
free from burrs.
– Degrease the crankshaft taper,
b 14
– Reassemble all other parts in the
reverse sequence.
35