Installing - Stihl MS 341 Shop Manual

6.7.2

Installing

New crankcases are supplied with
preassembled ball bearings and oil
seals. It is necessary to stamp the
machine's serial number on the
crankcase with 2.5 mm figure
stamps.
If only the ball bearings have to be
replaced, make sure all AV
elements, the suction hose and oil
tank cap are removed before the
crankcase is heated.
If the original crankcase is used
again, remove all gasket residue
and clean the mating surfaces
thoroughly to guarantee a perfect
seal.
If the flywheel side of the crankcase
is new, all the components still fitted
to the original crankcase must be
transferred and checked for
damage at the same time. This
involves the following operations:
1
: Fit the hose (1).
– Install the stop buffer –
b 9.1.4
MS 341, MS 361, MS 361 C
: Coat the grommets with STIHL
Press Fluid OH 723 – b 16.
: Fit the grommets (arrows).
: Install the annular buffer (1) –
b 9.1.2
If the clutch side of the crankcase is
new, all the components still fitted to
the original crankcase must be
transferred and checked for
damage at the same time. This
involves the following operations:
– Install the chain tensioner –
b 5.6
– Fit the bar mounting studs –
b 5.7
– Install the chain brake –
b 5.5.1 or 5.5.2
– Install the stop buffer –
b 9.1.4
– Heat the area of the ball bearing
seat on the flywheel side of the
crankcase to about 150 °C
(302 °F).
1
: Place the ball bearing, open side
facing up, on the inside of the
crankcase and push it home by
hand as far as stop.
This operation must be carried out
very quickly because the bearing
absorbs heat immediately and
begins to expand.
1
: If it is not possible to heat the
flywheel side of the crankcase,
use press arbor (1)
1118 893 7200 to press home the
ball bearing as far as stop.
45