Stihl MS 251 Instruction Manual - Page 42

Bearings / Crankshaft,

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2710RA114 TG : Place the engine pan (1) on the cylinder's sealing face. - Press the engine pan carefully 1 into position so that the sealant is evenly distributed. a 938RA098 TG : Apply a bead of sealant to the engine pan so that it is about 2 - 3 mm high (a). Take care not to damage the crankshaft stubs. - Install the engine, b 6.5 6.7 Bearings / Crankshaft : Pull the ball bearing (1) off the tapered crankshaft stub (ignition side). Make sure the sealant does not project into the crankcase. - Remove the engine, b 6.5 - Remove the crankshaft and pull off the oil seals, b 6.6 - Remove the piston, b 6.8 1 2710RA115 TG : Apply sealant to the groove in the sealing face, b 14 Do not coat oil seals with sealant. 2 1 2310RA111 TG 1 : Pull the ball bearing (1) off the straight crankshaft stub (clutch side). 2710RA113 TG : Pull out the needle cage (1), check it and replace if necessary. The crankshaft, connecting rod and needle bearing form an inseparable unit. When fitting a replacement crankshaft, always install new ball bearings and oil seals. 2310RA112 TG 3 : Position the engine pan (1) so that the tab (2) lines up with the shoulder (3) on the cylinder. MS 231, MS 231 C, MS 251, MS 251 C 41

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41
MS 231, MS 231 C, MS 251, MS 251 C
:
Apply a bead of sealant to the
engine pan so that it is about 2 –
3 mm high (a).
Make sure the sealant does not
project into the crankcase.
:
Apply sealant to the groove in the
sealing face,
b
14
Do not coat oil seals with sealant.
:
Position the engine pan (1) so
that the tab (2) lines up with the
shoulder (3) on the cylinder.
a
938RA098 TG
2310RA111 TG
2310RA112 TG
1
3
2
:
Place the engine pan (1) on the
cylinder's sealing face.
–
Press the engine pan carefully
into position so that the sealant is
evenly distributed.
Take care not to damage the
crankshaft stubs.
–
Install the engine,
b
6.5
6.7
Bearings / Crankshaft
–
Remove the engine,
b
6.5
–
Remove the crankshaft and pull
off the oil seals,
b
6.6
–
Remove the piston,
b
6.8
:
Pull out the needle cage (1),
check it and replace if necessary.
2710RA113 TG
1
:
Pull the ball bearing (1) off the
tapered crankshaft stub (ignition
side).
:
Pull the ball bearing (1) off the
straight crankshaft stub (clutch
side).
The crankshaft, connecting rod and
needle bearing form an inseparable
unit.
When fitting a replacement
crankshaft, always install new ball
bearings and oil seals.
2710RA114 TG
1
2710RA115 TG
1