Installing - Stihl 4141 Series Manual

1 2
Use the assembly drift (2)
1108 893 4700 to push the piston
pin (1) out of the piston.
Note:
If the piston pin is stuck, tap the end
of the drift lightly with a hammer.
Hold the piston steady during this
process to ensure that no jolts are
transmitted to the connecting rod.
3
Pull the piston (1) off the
connecting rod (3), collect the
cover washers (2).
– Push needle bearing out of
connecting rod.
18
– Inspect piston rings and ring
grooves - see 5.7.
1
2
5.6.2

Installing

2 3
1
– Clean the gasket seating surface
on the crankcase so that it looks
bright.
Fit cylinder gasket (4) (the word
"FAN" faces up, arrow points to
flywheel).
– Set connecting rod to top dead
center.
Lubricate the needle bearing (3)
with oil and fit it in the small end.
Fit cover washers (1) on either
side of small end, flat sides facing
outwards to piston.
Place the wooden assembly
block (2) 1108 893 4800 in
position.
– Heat the piston until it is hand hot.
1
Slip the piston over the
connecting rod, paying attention
to cover washers on needle
bearing.
Note installed position of piston:
Arrow on piston crown points to
exhaust port
Series 4141 Powerhead
4
2