Stihl 088 - Crankshaft Installation

STIHL 088 28
• Check that dowel pin is in position. If
necessary, drive dowel pin into new
crankcase.
• If it is not possible to heat the
crankcase, use the press arbor
(1) 1124 893 7200 to press in the
ball bearing as far as stop.
• Check that snap ring is fitted in the
clutch side of the crankcase.
• If necessary, use stud puller (1)
5910 893 0506 to unscrew the
collar studs.
- Heat area of bearing seat on
clutch side of crankcase to
approx. 150 C (300 F).
• Place ball bearing in position,
with stepped edge (1) down, and
push it home by hand as far as
stop.
Note: This operation must be
carried out very quickly because the
bearing absorbs heat immediately
and begins to expand.
• Remove the complete chain
tensioner - see 3.4.
4.7.2 Installing the Crankshaft
New crankcases come with
preassembled ball bearings.
Stamp the machine number on the
crankcase with 2.5 mm (0.1 ") figure
stamps.
If the original crankcase is used again,
remove the gasket residue and clean
the mating surfaces they must be
cleaned very thoroughly to ensure a
perfect joint.