Stihl HTA 66 Instruction Manual page 41

10 Checking Pole Pruner and Battery
a
► Use a STIHL gauge to check the wear marks
on the chain sprocket.
► If the wear marks are deeper than a = 0.5 mm:
Do not use your pole pruner and contact your
STIHL dealer for assistance.
The chain sprocket must be replaced.
10.2 Checking the Guide Bar
► Switch off the pole pruner and remove the bat‐
tery.
► Remove the saw chain and guide bar.
► Measure the depth of the guide bar with the
scale on a STIHL filing gauge.
► Install a new guide bar if one of the following
points applies:
– The guide bar is damaged.
– The measured guide bar groove depth is
less than specified minimum depth,
– The guide bar groove is pinched or splayed.
► If you have any doubts, be sure to consult a
STIHL dealer.
10.3 Checking the Saw Chain
► Switch off the pole pruner and remove the bat‐
tery.
2
0458-191-9821-B
19.3.
1
► Measure the height of the depth limiters (1)
with a STIHL filing gauge (2). The STIHL filing
gauge must match the pitch of the saw chain.
► If a depth gauge (1) projects from the filing
gauge (2): Lower the depth gauge (1) with a
file, 16.2.
2
4
► Make sure the service marks (1 to 4) on the
cutters are visible.
► If one of the service marks is not visible on a
cutter: Do not use your saw chain and contact
your STIHL dealer for assistance.
► Use a STIHL filing gauge to check that the fil‐
ing angle is 30° on all cutters. The STIHL filing
gauge must match the pitch of the saw chain.
► If the filing angle of 30° has not been main‐
tained: Resharpen the saw chain.
► If you have any doubts, be sure to consult a
STIHL dealer.
10.4 Checking the controls
Release slide, Ergo lever and trigger
► Remove the battery.
► Try squeezing the trigger switch without acti‐
vating the release slide.
► If the trigger can be pulled: Do not use your
pole pruner and contact your STIHL dealer for
assistance.
The release slide is faulty.
► Push the release slide with your thumb in the
direction of the saw chain and hold it there.
► Press and hold Ergo lever.
► Press the trigger.
The release slide can be released.
► Release the trigger and Ergo lever.
► If the release slide, trigger or the Ergo lever is
stiff or does not spring back to the idle posi‐
tion: Do not use the pole pruner and contact
your STIHL dealer for assistance.
The release slide, trigger or the Ergo lever is
defective.
Switching on the Pole Pruner
► Insert battery.
► Push the release slide towards the saw chain
and hold in place.
English
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