Stihl 064 - 11.11 Carburetor Box

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