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STIHL 029, 039
31
- Pull the engine pan off the
cylinder.
- Lift the crankshaft and pull the
piston out of the cylinder.
- Inspect the cylinder and replace
it if necessary.
Note:
If a new cylinder has to be
installed, always fit the matching
piston. Replacement cylinders are
only supplied complete with piston
for this reason.
- Thoroughly clean all residue of
sealant from the cylinder and
engine pan mating faces.
- Lubricate piston and piston rings
with oil.
- Position the piston rings so that
the radii at the ring gap meet at
the fixing pin in the piston groove
when the rings are compressed.
Note:
The clamping strap can only
be used with cylinders whose inner
contour is the same as that shown in
the illustration above.
- Use the clamping strap to com-
press the piston rings around the
piston and check that the piston
rings are correctly positioned.
- Close the clamping strap and
compress it so that the lug engages
the square hole.
- Position the clamping strap so that
its channel sections line up with the
center of the piston pin.
Top:
Inner contour of cylinder
Bottom:
Clamping strap 1127 893 2600
Correct position of
piston rings
Top:
Fitting clamping strap on
piston rings
Bottom:
1 = Piston pin
2 = Channel section on
clamping strap