Stihl HT 75 Instruction Manual - Page 29

Taking Care of Guide Bar, Cleaning the Air Filter, Turn the bar over, Measure groove depth

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english Taking Care of Guide Bar Cleaning the Air Filter : Measure groove depth - with scale on filing gauge - see "Special Accessories" - in area 2 used most for cutting on Rollomatic bars. Chain type Picco-Mini Chain pitch Minimum groove depth 3/8" P 5.0 mm (0.20") 1 3 : Turn the bar over - every time you sharpen the chain - and every time you replace the chain - this avoids one-sided wear, especiallly at nose and underside of the bar. Regularly clean 1 = oil inlet hole 2 = oil passage 3 = bar groove If groove depth is less than specified: : Replace the guide bar. The drive link tangs will otherwise scrape along the bottom of the groove - the cutters and tie straps will not ride on the rails. 2 1 Dirty air filters reduce engine power increase fuel consumption and make starting more difficult. If there is a noticeable loss of engine power : Move choke lever to g. : Press in the tab (1). : Ease the filter cover (2) over the tab and take it away. : Clean away loose dirt from around the filter. : Remove the foam and felt filter elements. 390BA050 KN 355BA014 KN 28 HT 70, HT 75

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28
english
HT 70, HT 75
:
Turn the bar over
–
every time you sharpen the chain –
and every time you replace the
chain – this avoids one-sided wear,
especiallly at nose and underside of
the bar.
Regularly clean
1 =
oil inlet hole
2 =
oil passage
3 =
bar groove
:
Measure groove depth –
with scale on filing gauge – see
“Special Accessories“ – in area
used most for cutting on Rollomatic
bars.
If groove depth is less than specified:
:
Replace the guide bar.
The drive link tangs will otherwise
scrape along the bottom of the groove –
the cutters and tie straps will not ride on
the rails.
Dirty air filters reduce engine power
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
:
Move choke lever to
g
.
:
Press in the tab
(1)
.
:
Ease the filter cover
(2)
over the tab
and take it away.
:
Clean away loose dirt from around
the filter.
:
Remove the foam and felt filter
elements.
Taking Care of Guide Bar
3
2
1
390BA050 KN
Chain type
Chain pitch
Minimum
groove depth
Picco-Mini
3/8" P
5.0 mm
(0.20")
Cleaning the Air Filter
355BA014 KN
2
1