Flywheel 38 Removing - Stihl 034 Series User Manual

6.4 Flywheel
6.4.1 Removing
Take out mounting screws and
remove the fan housing.
– Rotate the flywheel so that the
magnet poles are opposite the
ignition module.
– Use locking strip 0000 893 5903
to block the piston - see
Unscrew the flywheel mounting
nut from the crankshaft.
Screw puller 1110 890 4500 into
flywheel hub as far as stop.
Hold puller steady with a 24 mm
wrench and use a 17 mm wrench
to screw home the thrust bolt until
the flywheel comes away from its
seat on the crankshaft.
38
– Take off the flywheel.
– Inspect the flywheel. If you find
any damage (e.g. cracks, ,
broken fan blades), fit a new
flywheel.
Important:
If a new flywheel 1125 400 1208 is
installed in a machine with heated
handles X 31 813 247, the
original front handle must always be
replaced by front handle
1125 790 1702 to take account of
the higher power output.
In addition, the new heating element
1128 434 5000 must be fitted in the
rear handle since the heating
elements may otherwise burn out.
The old front handle 1125 790 1707
and the old heating elements
1125 434 5000 may only be
installed in machines with flywheel
1125 400 1207.
Front handles and heating elements
can be identified with the aid of the
following resistances:
4.3.
Rear handle heating element:
Old version (1) 0.225...0.275 Ω
New version (2) 0.922...1.1
Front handle heating element:
Old version
New version
6.4.2
Check correct position of
Important:
– Clean the stub of the crankshaft
– Fit the flywheel in position.
Fit and tighten down the flywheel
Reassemble all other parts in the
reverse sequence.
1 2
Observe tightening torques when
refitting the fan housing (see
"Tightening Torques").
Ω
Ω
1.44 ...1.76
Ω
6.3 ...7.7
Installing
Woodruff key.
and the flywheel hub bore with a
standard commercial, solvent-
based degreasant containing no
chlorinated or halogenated
hydrocarbons - see 13.2.
nut (see "Tightening Torques").
034, 036, 036 QS