STIHL 019 T
23
4.9
Crankshaft
4.8 Piston
Ring
- Pull the piston out of the cylinder
- Remove ring from piston.
- Fit the hookless snap rings in the
grooves.
Note:
The ring gap must be on the
piston's vertical axis (point either up
or down).
- Install the piston - see 4.6.
• Use a piece of old piston ring to
scrape the groove clean.
• Install the new piston ring in the
groove so that the radii face upward
to piston head.
- Install the piston - see 4.6.
• Remove the retaining ring.
• Fit the piston pin (1) on the
assembly drift (2) and slide it
into the piston (the pin slides
home easily if the piston is
warm).
- Remove the piston - see 4.7.
• The crankshaft (1), connecting
rod
(2) and needle bearing are
inseparable. This means the
crankshaft must always be
replaced as a complete unit.
- When fitting a replacement
crankshaft, always install new
oil seals and ball bearings.
