Stihl HTA 135 Owner's Instruction Manual page 46

English
kickback tendency of the pole pruner and can increase
kickback forces, making it more difficult to control the pole
pruner. Always review and follow the sharpening angles and
dimensions recommended by STIHL when checking or
sharpening the chain.
WARNING
Never use a dull or damaged chain. This leads to increased
physical strain, increased vibration load, unsatisfactory
cutting results and increased wear. If the chips from cutting
are fine, more like saw dust than wood chips, the chain likely
is dull.
► Switch off the pole pruner and remove the battery.
2
► Check the height of the depth gauge (1) with a STIHL file
gauge (2) matching the pitch of the chain.
► If the depth gauge protrudes higher than the file gauge,
file the depth gauge to the appropriate height.
► Work carefully. Filing the depth gauges too low will
increase reactive forces. If the depth gauges have been
filed too low, have the chain sharpened or replaced by an
authorized STIHL dealer.
44
STIHL chain is manufactured with wear marks to help the
operator identify excessive wear. The wear marks depicted
above (1 - 4) must remain visible.
1
► Replace the chain if any wear marks are no longer visible.
► Check the 30° sharpening angle of the cutters with a
► If the sharpening angle is incorrect, file the cutters to a 30°
► If you are unable to achieve the proper angle, or suspect
An improperly filed chain can be very dangerous. It can
increase the potential for reactive forces, including kickback,
and also increase the magnitude of those reactive forces.
The chain pitch marking (a) is embossed in the area of the
depth gauge of each cutter.
The markings mean the following:
2
4
STIHL file gauge matching the pitch of the chain.
angle.
you have not achieved the proper angle, have the chain
sharpened by an authorized STIHL servicing dealer.
23 Inspection and Maintenance
1
3
a
0458-698-8621-A