25FC 75, FC 85, FH 75, FS 75, FS 80, FS 85, HL 75, KM 85, KW 85
– Coat rubber element with STIHL 
Press Fluid, b 12. 
: Push the rubber element into the 
fan housing so that the slot (1) is 
on the round side (2) of the 
housing.
VA
936RA241
2
: Install the retaining ring (gap 
facing clamp screw) so that it 
locates in the slots (arrow) in the 
fan housing.
VA
936RA242
Assemble all other parts in the 
reverse sequence.
: Push home the drive tube until 
the holes line up.
– Tighten down the fixing screw 
and clamp screw firmly, b 3.2
VA
936RA243