Taking Care Of Guide Bar; Cleaning The Air Filter - Stihl HT 70 Instruction Manual

english

Taking Care of Guide Bar

2
1
: 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
28
: Measure groove depth –
with scale on filing gauge – see
"Special Accessories" – in area
used most for cutting on Rollomatic
bars.
Chain type
Picco-Mini
If groove depth is less than specified:
: Replace the guide bar.
3
The drive link tangs will otherwise
scrape along the bottom of the groove –
the cutters and tie straps will not ride on
the rails.
Chain pitch Minimum
groove depth
3/8" P 5.0 mm
(0.20")

Cleaning the Air Filter

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.
HT 70, HT 75
2