26
English / USA
BT 121
1)
STIHL recommends the STIHL servicing
dealer
Maintenance Chart
Please note that the following maintenance intervals apply for normal operating
conditions. If your daily working time is longer than normal or conditions are
difficult (very dusty work area, etc.), shorten the specified intervals accordingly.
before
starting work
after finishing
work or daily
after each
refueling stop
weekly
monthly
yearly
if problem
if damaged
as required
Complete machine
Visual inspection (condition, leaks)
Xx
Clean
X
Auger brake
Check operation
XX
Have serviced by dealer
1)
X
Control handle Check operation
XX
Air filter
Clean
X
Replace
X
Pickup body in fuel tank
Check
X
Replace
XX
Fuel tank Clean
X
Carburetor
Check idle adjustment –
drilling spindle must not rotate
X
Readjust idle
X
Spark plug
Readjust electrode gap
X
Replace after 100 hours of operation
Spark arresting screen in muffler Have checked by STIHL dealer
X
All accessible screws and nuts (not
adjusting screws)
Retighten
Antivibration elements
Check
XXX
Have replaced by dealer
1)
X
Gearbox Re-lubricate
X
Drilling spindle Clean
X
Auger
Inspect
X
Replace
X
Safety labels Replace
x
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