Stihl TS 400 Manual page 21

STIHL TS 400
• Plug piston pin (1) into the stud of
assembly pin (2) and insert in
piston (the piston pin can be
inserted without difficulty when the
piston is warm).
• Position the assembly tool (1) on the
piston pin eye, steady the piston and
press the tool shaft inwards parallel
to the axis of the piston pin until the
snap ring engages in the groove.
Note: Refer to the manual "Trouble-
shooting, standard repairs" for details
on handling the assembly tool.
- Fit a new cylinder gasket.
• Coat the piston and piston rings
with oil and place the piston (1) on
the wooden assembly block (2).
• Line up the piston rings; the fixing
pin must be engaged in the annular
groove by the bevelled radii of the
ring joint when compressed.
• Encircle the piston and piston
rings with the strap retainer (1).
- Ensure that the piston rings are
positioned correctly.
- Coat the inside of the cylinder
with oil and line it up in
accordance with its subsequent
installation position. The piston
rings may break if this is not
done.
• Slide the cylinder over the piston;
the strap retainer slips downwards
and the piston rings slide into the
cylinder.
- Remove the strap retainer and
wooden assembly block.
- Precisely align the cylinder and
cylinder gasket.
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