Stihl MS 311 User Manual - Page 37

Piston, Installing

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6.7 Piston - Remove the cylinder, b 6.5 The snap ring at the clutch side cannot be removed. If the piston pin is stuck, release it by tapping the end of the drift lightly 1 with a hammer. Hold the piston steady during this process to ensure that no jolts are transmitted to the connecting rod. - Remove the piston. 533RA125 TG - Inspect the piston rings and replace if necessary, b 6.8 : Push the assembly drift (1) 1108 893 4700, small diameter first, through the piston and small end (needle cage) and line up the piston. 4903RA087 TG : At the ignition side, use a suitable tool at the recess (arrow) to remove the hookless snap ring from the piston boss. 1 4903RA252 TG 1 2 : Pull out the needle cage (1), check it and replace if necessary, 1 b 14 533RA126 TG Installing 1 - Lubricate the piston pin (2) with oil. : Fit the piston pin (2) on the assembly drift (1) and slide it into the piston. 533RA121 TG : Push the assembly drift (1) 1108 893 4700 through the installed snap ring. 4903RA088 TG : Use the assembly drift (1) 1108 893 4700 to push the piston pin out of the piston. - Lubricate the needle cage with oil and push it into the connecting rod. 0001RA481 TG - Position the piston as shown so that the mark (arrow) points to the rear and the long crankshaft stub (1) is on the right. - Place the piston on the connecting rod. 2 1 : Remove the sleeve (1) from the installing tool (2) 5910 890 2212. 36 MS 311, MS 391

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36
MS 311, MS 391
6.7
Piston
–
Remove the cylinder,
b
6.5
The snap ring at the clutch side
cannot be removed.
:
At the ignition side, use a suitable
tool at the recess (arrow) to
remove the hookless snap ring
from the piston boss.
:
Push the assembly drift (1)
1108 893 4700 through the
installed snap ring.
:
Use the assembly drift (1)
1108
893
4700 to push the piston
pin out of the piston.
4903RA087 TG
1
533RA121 TG
If the piston pin is stuck, release it
by tapping 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.
–
Remove the piston.
–
Inspect the piston rings and
replace if necessary,
b
6.8
:
Pull out the needle cage (1),
check it and replace if necessary,
b
14
Installing
–
Lubricate the needle cage with oil
and push it into the connecting
rod.
–
Position the piston as shown so
that the mark (arrow) points to
the rear and the long crankshaft
stub (1) is on the right.
–
Place the piston on the
connecting rod.
1
4903RA252 TG
1
4903RA088 TG
:
Push the assembly drift (1)
1108 893 4700, small diameter
first, through the piston and small
end (needle cage) and line up the
piston.
–
Lubricate the piston pin (2) with
oil.
:
Fit the piston pin (2) on the
assembly drift (1) and slide it into
the piston.
:
Remove the sleeve (1) from the
installing tool (2) 5910 890 2212.
533RA125 TG
1
533RA126 TG
1
2
1
2
0001RA481 TG