Inner Fan Housing; Fanwheel - Stihl BR 500 Service Manual

11.2

Inner Fan Housing

– Remove the fanwheel, b 11.3
– Remove the elbow, b 11.1
– Remove the air guide shroud,
b 7.2
– Remove the carburetor, b 6.2.2
– Remove the antistatic wire,
b 11.4
: Take out the screws (arrows)
– Remove the engine.
Install in the reverse sequence.
Do not lubricate the thread of the

fanwheel.

56
BR 500 only
: If the fan housing is replaced, the
soundproofing liner (1) must be
fitted at the engine side.
: When installing, check that the
groove in the manifold is properly
seated in the fan housing (arrow).
– Check that the throttle cable and
fuel hoses are correctly
positioned.
Install all other parts in the reverse
sequence.
11.3 Fanwheel
1
1
– Remove outer fan housing,
b 11.1
– Use combination wrench
4180 890 3400 to unscrew the
spark plug.
: Screw the locking screw
4282 890 2700 (1) fully home.
Always use the specified locking
screw to avoid any risk of damaging
the piston.
: Unscrew the fanwheel (1)
counterclockwise.
Right-hand thread. Very high
release torques may be necessary
after long periods of operation.
BR 500, BR 550, BR 600
1