Chain Tensioner - Stihl MS 661 Manual

2 3
4
: Remove the pins (1) to (5).
Installing
– Before installing the new pin, coat
its knurled shank with
threadlocking adhesive, b 16
: Position the new pin in the bore
(arrow) so that the knurling on the
pin meshes with the existing
knurling in the bore.
The pins must be driven home
squarely.
22
1
5
2
: Drive home the pins (1 and 2) as
specified below.
: Pin (1) a = about 2.9 - 3.3 mm
Pin (2) b = about 4.3 - 4.7 mm
3
4
: Drive home the pins 3, 4 and 5)
as specified below.
1
: Pin (3) a = about 9.9 - 10.1 mm
– Lubricate the brake lever and
a
1
– Reassemble all other parts in the
2
b
5.6
– Troubleshooting, b 3.2
– Remove the side plate, b 5.2
5
: Rotate the spur gear (1)
: Take out the screw (2) and pull
– Remove the O-ring.
– Check individual parts of the
a
4
c
b
Pin (4) b = about 4.6 - 4.8 mm
Pin (5) c = about 5.1 - 5.3 mm
cam lever with STIHL grease,
b 16
reverse sequence.

Chain Tensioner

1
2 3
clockwise until the screw (2) is
visible.
out the tensioner (3).
chain tensioner, replace if
necessary
MS 661, MS 661 C-M
3
5