Stihl 029, 039 - 3.6 Bar Mounting Studs

STIHL 029, 039 22
3.6 Bar Mounting
Studs
Top:
1 = Thrust pad
2 = Tensioner slide
3 = Adjusting screw
4 = Spur gear
5 = Cover
Bottom: Removing tensioner slide Unscrewing collar stud with
Withdrawing the spur gear and adjusting screw stud puller 5910 893 0501
- Pull the tensioner slide off the - Remove the sprocket cover.
cover.
- Push the stud puller over the
- Take the adjusting screw out of front collar stud (next to spiked
the cover. bumper) as far as it will go. Use
a 15 mm wrench to unscrew the
- Inspect the teeth on the spur collar stud counterclockwise.
gear and adjusting screw. If the
teeth are damaged, replace both - Fit the collar stud and torque it
parts. down to 16 Nm (11.8 Ibf.ft).
Note: The collar stud next to the
Reverse the above sequence to chain sprocket is installed with
install the chain tensioner. Loctite.
Note: Coat teeth of adjusting - Remove the muffler - see 4.1.
screw and spur gear with grease,
see 12.2, before refitting. - Use hot air blower (e.g. hair
dryer) to heat engine pan around
the collar stud. Then unscrew the
collar stud with the stud puller.
- Coat thread of collar stud with
Loctite, see 12.2.
- Fit collar stud and torque it down
to 30 Nm (22 Ibf.ft).
- Install the muffler - see 4.1.
- Take the thrust pad off the
adjusting screw.
- Rotate spur gear until the
adjusting screw comes is clear
of the tensioner slide.
- Pull the spur gear out of the
cover.