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BT 121
English
21
Drilling spindle
Clean
X
Auger
Check
X
Replace
X
Safety labels
Replace
X
1)
STIHL recommends a STIHL servicing dealer.
2)
not in all versions, market-specific
The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
be
for
e st
art
in
g w
o
rk
af
ter
fi
ni
sh
ing w
ork or dai
ly
af
ter
eac
h r
efu
el
in
g
stop
we
e
kly
mo
nth
ly
eve
ry 12 mon
ths
if p
ro
b
le
m
if d
am
age
d
if r
eq
u
ire
d