STIHL 029, 039
21
3.4
Front Chain
Tensioner
3.5
Side Chain
Tensioner
Top:
1 = Adjusting screw
Top:
2 = Adjusting nut
Cover mounting screw
a = 19.5 mm (0.77")
Bottom:
b = 1.7 mm (0.07")
Bottom:
Removing cover
c =
∅
10 mm (0.4")
Removing the chain tensioner
Note:
The front chain tensioner can
be converted to a side chain
tensioner - see 3.5.
In the case of a coversion from
front to side chain tensioner, it is
necessary to drill a hole in the
sprocket cover to take the peg of the
spur gear - see dimensions in
illustration.
Reverse the above sequence to
install the chain tensioner.
- Remove the chain sprocket cover.
- Take out the cover mounting
screw.
- Pull the chain tensioner assem-
bly out of the engine housing.
- Remove chain sprocket cover.
- Unscrew the adjusting nut by
rotating the adjusting screw.
- Take the adjusting screw out of
the cover and housing.
- Pull the cover out of the engine
housing.
