0458-725-8621-B
48
English 
22 Inspection and Maintenance
To lubricate the gearbox:
► Remove the screw plug (2).
► If no grease can be seen on the inside of the screw plug, 
screw the tube (1) of STIHL gear lubricant into the filler 
hole.
► Squeeze no more than 0.2oz (5g) of STIHL gear 
lubricant into the gearbox.
► Remove the tube of STIHL gear lubricant.
► Insert the screw plug and tighten it down firmly.
NOTICE
Do not completely fill the gearbox with grease.
22.4 Replacing the Trimmer Line on an AutoCut 25
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2 
Mowing Head
WARNING
Use of wire or metal-reinforced line is not authorized and 
could be extremely dangerous. Use only the cutting 
attachments recommended in this manual, in combination 
with the recommended deflector.
WARNING
A damaged or loose cutting attachment or mowing head may 
vibrate, crack, break or come off the trimmer / brushcutter, 
which may result in serious or fatal injury or property 
damage. Make sure the mowing head and cutting 
attachment are properly and securely tightened and in good 
condition before starting work.
► Switch off the power tool, @ 15.2.
► Remove the connecting cord, @ 14.2.
► Remove the mowing head, @ 11.5.2.
► Press both tabs (1) and remove the cover (2).
► Press down on the spool (3), turn it clockwise to release 
the spool and pull up to remove it.
► Remove the remaining trimmer line(4) and dispose of it.
► If you use trimmer line with a diameter of 0.095in. 
(2.4mm), cut a 33ft. m (10m) length of nylon line from 
the reel and then cut it in half, making two 16.5ft. (5m) 
lengths.
► Insert the first 16.5ft. (5m) length of line into the 
eyelet(5) nearest the notches (6) until it stops.
0000-GXX-4033-A0
1
1
4
2
3
0000-GXX-4034-A0
6
5