SP 451, SP 481
English
21
Visual Inspection
N
Visually inspect the whole machine
before each use and after every
refueling stop.
Screws and Nuts
N
Check all accessible screws and
nuts (not the carburetor adjusting
screws) about every 25 hours of
operation.
N
Check the screw union of the shaft
and pushrod in the hand guard after
every refueling stop – see
"Assembling the Unit".
Replacing the Rubber Element on the
Hook
Removing the rubber element
N
Use a suitable tool to pry the clips
(1) out of the hook (2).
N
Do not re-use damaged or bent
clips. Always fit new ones.
N
Cut the worn rubber element (3) so
that it can be easily pulled off the
hook.
Installing the rubber element
N
Coat the new rubber element (3)
and
the hook (2) thoroughly with
STIHL press fluid OH 723 – see
"Special Accessories".
N
Push the hook into the rubber
element as shown.
N
Insert the clips (1) in the rubber
element and press them home as
far as stop.
Inspection and
Maintenance by User
4902BA034 KN
4902BA035 KN
4902BA036 KN
4902BA037 KN
4902BA038 KN
4902BA039 KN
