STIHL 064, 066 21
- If it is necessary to replace the - If the brake spring anchor pin
brake spring anchor pin, remove have been removed, coat the
the cylinder (see 4.2) and use a knurled area of the new pin with
suitable punch to drive the an- Loctite, see 12.2, before installa-
chor pin out of the crankcase in tion.
the direction of the arrow
(see illustration). - Position the new pin in the bore
so that the knurling on the pin
Note: Do not drive out the pin in meshes with the existing knurling
the other direction as this would in the bore.
damage the annular bead which
was formed in the crankcase bore - Carefully tap home the pin
when the pin was originally in- squarely to obtain dimension "a"
stalled. In such a case neither the (see illustration).
new anchor pin nor the brake
spring would locate properly. Fur- - Install the cylinder - see 4.3.2.
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
- 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.
3.3.2
ssembl
Top:
1 = Cam lever
2 = Spring
Correctly installed brake spring Bottom:
anchor pin Hand guard bearing boss
Driving out brake spring anchor pin a = 4.3 - 4.7 mm (11/64 in) with bell crank
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