Stihl 034 Series User Manual page 17

4.5.5 Checking Operation of Chain Brake
Check operation of the chain brake
with the bar and chain mounted.
Note:
When starting the machine observe
local safety regulations and the
safety precautions in the owner's
manual.
– With the engine running, open
the throttle wide.
– Release the rear handle.
The chain must come to a standstill
in less than one second.
If the brake does not operate
properly, service the sliding and
bearing points shown in the
illustrations as follows:
If lightly contaminated:
– Clean all parts with a brush and
white spirit.
If heavily contaminated or
clogged with resin:
– Remove the parts concerned and
clean in white spirit or a resin
solvent.
– Replace worn or damaged parts.
– Before re-installing parts, the
machine recesses and seats.
034, 036, 036 QS
Lubricate bearing points with
Mobilplex grease (see
1
2
Lubricate these points (1) with
Mobilplex grease (see
Coat outside diameter of clutch
drum (2) with chain oil.
Note:
If a biological chain oil is preferred,
STIHL recommends the use of
rapidly biodegradable STIHL
Bioplus.
To guarantee troublefree operation,
use only original STIHL replace-
ment parts as per the latest parts
list.
4.6 Chain Tensioner
2
1
– Remove chain sprocket cover
13.2). and cutting attachment -
Remove mounting screw (1) from
inner side plate (2) and lift side
plate away.
1
2
Use a screwdriver to turn the spur
13.2). gear clockwise until tensioner
slide butts against the thrust pad.
Note:
Older machines are equipped with
a front chain tensioner -
see 4.1.
see 5.5.2.
17