Stihl 064 Service Manual page 21

STIHL 064, 066
Driving out brake spring anchor pin
- If it is necessary to replace the
brake spring anchor pin, remove
the cylinder (see 4.2) and use a
suitable punch to drive the an-
chor pin out of the crankcase in
the direction of the arrow
(see illustration).
Note: Do not drive out the pin in
the other direction as this would
damage the annular bead which
was formed in the crankcase bore
when the pin was originally in-
stalled. In such a case neither the
new anchor pin nor the brake
spring would locate properly. Fur-
thermore, the crankcase could be
damaged and impair operation of
the chain brake.
Inspect condition of all parts. Re-
place any damaged or worn parts
3.3.2 Assembly
Correctly installed brake spring
anchor pin
a = 4.3 - 4.7 mm (11/64 in)
- If the brake spring anchor pin
have been removed, coat the
knurled area of the new pin with
Loctite, see 12.2, before installa-
tion.
- Position the new pin in the bore
so that the knurling on the pin
meshes with the existing knurling
in the bore.
- Carefully tap home the pin
squarely to obtain dimension "a"
(see illustration).
- Install the cylinder - see 4.3.2.
Top:
1 = Cam lever
2 = Spring
Bottom:
Hand guard bearing boss
with bell crank
- Fit the cam lever and spring.
- Fit the E-clip.
- Insert bell crank in the side opening of
the hand guard bearing boss.
Note: Pay attention to correct installed
position of bell crank.
21