Stihl 064 - 4.6.3 Vacuum Test

STIHL 064, 066 30
- Push the manifold onto the intake Note: If a new cylinder with a long - Use the clamping strap to com-
port so that its tab lines up with exhaust port is installed, also re- press the piston rings around the
the rib on the cylinder (see illus- place the old muffler - see 4.1. piston.
tration). - Lubricate the inside of the cylin-
- Slide the hose clamp onto the - Position the piston rings so that der with oil and line it up so that
manifold. The screw head must the radii at the ring gap meet at it is roughly positioned as it will
point to the right. the fixing pin in the piston groove be in the installed conditon.
- Tighten the hose clamp so that when the rings are compressed.
its ends point to the right at an - Now slide the cylinder over the
angle of approx. 45° (looking at piston - the clamping strap is
intake port). Continue tightening pushed downward as the piston
the screw until the gap between rings slip into the cylinder.
the two ends of the hose clamp
is 7 - 7.5 mm (approx. 9/32"). - Remove clamping strap and
wooden assembly block.
Top:
Correct position of manifold Top: Top:
Fixing pins in piston and correct Compressing piston rings with
Bottom: position of piston rings the clamping strap
Correct position of hose clamp
a = 7 - 7.5 mm (approx. 9/32") Bottom: Bottom:
b = a
pp
rox. 45° Clam
p
in
g
stra
p
0000 893 2600 Fittin
g
c
y
linder over the
p
iston