Stihl MS 291

30 MS 271 C, MS 291 C
5.6 Pins
The anchor and pivot pins secure
the springs. Worn pins must be
replaced.
– The springs may otherwise
become detached and pop out.
The pins must be driven home
squarely.
For greater clarity, all parts have
been removed from the pins in the
following illustrations.
: Remove the pins (1) to (6).
Pin 6 is fitted only on machines with
QuickStop Super.
off
of
f
2710RA055 TG
1
6
4 5
32
Installing
– Before installing the new pin, coat
its knurled shank with
threadlocking adhesive, b 14
: Position the new pin in the
bore (arrow) so that the knurling
on the pin meshes with the
existing knurling in the bore.
Turn pin back and forth as
necessary.
The pins must be driven home
squarely.
: Drive home the pins (1 and 2) as
specified below.
2710RA056 TG
off
2710RA057 TG
2
1
: Pin (1) a = about 2.9 - 3.3 mm
Pin (2) b = about 4.3 - 4.7 mm
: Drive home the pins (3, 4 and 5)
as specified below.
: Pin (3) a = about 11.0 - 11.4 mm
Pin (4) b = about 4.6 - 4.8 mm
Pin (5) c = about 5.1 - 5.3 mm
a
b
0001RA061 TG
1
2
off
2710RA058 TG
3
4 5
a
c
b
3
4
5
0001RA063 TG