Bearings / Crankcase - Stihl MS 240 Instruction Manual

: Use a 4 mm dia. drift to drive
home the dowel pin at the chain
tensioner side until the pin is flush
with the hole at the other side.4 m
: Insert the screws (arrows) and
tighten them down firmly in an
alternate pattern.
– Tightening torques, b 3.5
MS 240, MS 260, MS 260 C
2
1
: Fit the washer (1) and ring (2).
– Check and install the piston,
b 8.7.2
– Check and install the cylinder,
b 8.5
– Reassemble all other parts in the
reverse sequence.
8.6.2

Bearings / Crankcase

Each half of the crankcase can be
replaced separately if it is damaged.
New crankcase halves are supplied
with the main parts preassembled
– see the parts list.
Parts not supplied with the new
crankcase must be transferred from
the original crankcase – check the
parts and replace if necessary.
If a new crankcase is installed, the
machine's serial number must be
stamped on it with 2.5 mm figure
stamps.
If the original crankcase is used
again, replace the oil seals and ball
bearings, remove any gasket
residue and clean the sealing
surfaces thoroughly. The sealing
faces must be clean to guarantee a
perfect seal.
Inspect both halves of the
crankcase for cracks and all sealing
faces for signs of damage.
– See also Troubleshooting,
b 4.7
– Remove the crankshaft, b 8.6.1
– Wear protective gloves to reduce
the risk of burn injury.
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