Replacing The Bar Nose - Stihl OILOMATIC Manual

Removing
Drill away the heads of the rivets
(use a twist drill with a diameter
about 0.5 mm Iarger than the rivet
head).
Knock out the rivets with a punch.
Pull out the nose sprocket with
bearing from between the two side
plates.
The complete sprocket assembly
must be replaced to ensure
troublefree operation.
Installing
Clamp the guide bar vertically in a
vise.
Select the nose sprocket that
matches the guide bar.
The roller bearing is covered with
two Plexiglas discs which held in
position by a clip. These Plexiglas
discs simplify installation of the
nose sprocket and prevent the
bearing rollers dropping out.
Chain and Bar Manual
1
Remove the clip and carefully push
the nose sprocket into the bar nose
– making sure the two Plexiglas
discs (1) are held together and
cover the bearing. The Plexiglas
discs are no longer required after
the nose sprocket is installed.
Line up the bearing race so that its
holes line up with the holes in the
bar nose.
Fit the countersunk rivets and form
the heads so they completely fill the
hole recesses.
Thoroughly lubricate the repaired
guide bar before is used for cutting.
4.7.4

Replacing the Bar Nose

The complete nose can be replaced
on Rollomatic ES guide bars with a
riveted bar nose. This is necessary
if the rails are chipped or cracked, or
there is no clearance between the
chain and bar nose – see
"Replacing the Nose Sprocket" – or
if the roller bearing is damaged.
Removing
1
Drill away the heads of the rivets
(use a twist drill with a diameter
about 0.5 mm Iarger than the rivet
head).
Knock out the rivets with a punch
and remove the bar nose.
Installing
Select a bar nose that matches the
guide bar and push it on to the guide
bar.
Form the rivets as described above
for the nose sprocket.
Check that the joints in the bar rails
are the same height. If this is not the
case, the projecting rails must be
ground down, e.g. on a belt grinder,
to obtain a level transition.
45