Chain Brake And Chain Tensioner 8 - Stihl 034 Series User Manual

4 Clutch, Chain Drive,
Chain Brake and
Chain Tensioner
Troubleshooting chart - see
"Standard Repairs, Trouble-
shooting" handbook.
3
2
Unscrew nuts (1) from chain
sprocket cover (2). Remove the
sprocket cover, bar and chain (3).
Disengage the chain brake by
pulling the hand guard toward the
front handle.
8
4.1 Clutch Drum and Chain Sprocket
1 2
Remove the E-clip (1) and
washer (2). If a rim sprocket (3)
is fitted, pull it off.
2
1
1
036 QS
Disengage the additional brake
by pressing down the throttle
trigger and interlock lever.
Remove the clutch drum (1) and
needle cage (2).
034, 036
Pull off the chain sprocket (1) or
clutch drum (2).
– Take out the needle cage.
3
!
80%
Inspect the clutch drum (1).
There should be no scores or
signs of excessive wear.
Important:
If there are signs of serious wear on
the inside diameter of the clutch
drum (1), check the remaining wall
thickness. If it is less than about
80% of the original thickness, fit a
new clutch drum.
Note:
Clean stub of crankshaft. Wash
needle cage, examine it for damage
and replace if necessary. Lubricate
needle cage with STIHL multi-
purpose grease - see
Reassemble in the reverse
sequence - start by fitting the needle
cage on the crankshaft stub.
1
2
034, 036, 036 QS
1
100%
13.2.