Stihl 064 Service Manual page 73

STIHL 064, 066
10.2 Suction Hose
Top:
Withdrawing the suction hose
Bottom:
Correct position of suction hose
- Remove the oil pump - see 10.4.
- Use pointed nose pliers to grip
the tab of the oil hose and pull it
out of the crankcase.
- Pull off the pickup body - see
10.1.
- Fit the pickup body - see 10.1.
- Use a blunt tool to push the suc-
tion hose into the crankcase so
that the tab locates it its seat at
the bottom right.
- Install the oil pump - see 10.4.
10.3 Vent Valve
Top:
Vent valve
Bottom:
Installed position of valve
a = approx. 1 mm (3/64")
There is vent valve in the tank wall
which keeps the internal pressure
in the oil tank equal to atmos-
pheric pressure.
- Remove the inner side plate.
- Drain the oil tank.
- Use a 7 mm (9/32") dia. drift to
carefully drive the vent valve into
the crankcase and then remove it
from the oil tank.
- Carefully press in the new valve
until it is about 1 mm (3/64")
below the face of the crankcase.
- Refit the inner side plate.
10.4 Removal and Installation
of Oil Pump
Top:
Removing worm with spring
Bottom:
1 = Worm with original spring
2 = Worm with new spring
- Remove the brake band - see
3.3.1.
- Remove the clutch - see 3.2.
- Rotate the worm and spring
clockwise and pull them off the
crankshaft stub.
Note: The spring and worm have
been modified. Original versions of
these parts cannot be combined
with the new versions.
73