HSA 66
English
18
Maintenance and Care
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.
Move the retaining latch to 
ƒ before performing any work on the power tool.
before starting work
after finishing work or daily
weekly
monthly
every 12 months
if problem
if damaged
if required
Complete machine
Visual inspection (condition) X
Clean X
Controls (retaining latch, trigger switch 
lockout, trigger switch and switch lever)
Check operation X
Clean XX
Two-hand control
Check function – blades must quickly 
come to a standstill when the trigger 
switch and/or switch lever is released
X
Cooling inlets
Visual inspection X
Clean X
All accessible screws and nuts Retighten X
Battery Visual inspection XXX
Battery compartment
Clean XX
Check operation (eject battery) X
Cutting blade
Visual inspection XXX
Clean 
1)
X
Sharpen XX
Gearbox and connecting rod
Have checked by servicing dealer
2)
 after 
every 50 hours of operation
Have STIHL gear lubricant replenished 
every 50 hours of operation by servicing 
dealer
2)
Safety labels Replace X
1)
Spray with STIHL resin solvent after cleaning
2)
STIHL recommends a STIHL servicing dealer.