9
10
11
Replacing cylinder liners
122
Installing cylinder liners
Fig. 9
Insert dry new O-rings for the lower seal (144x4)
into the crankcase.
Insert new O-rings for the upper seal (138x2) into
the grooves on the cylinder liner.
Do not overstretch the O-rings.
Note:
No grease or sealing agents of any kind
must be used for installing cylinder liners
and O-rings
Fig. 10 and Fig. 11
Apply thin coat of engine oil to cylinder liner in the
area of the upper and lower O-ring.
Apply thin coat of engine oil to lower O-rings in the
crankcase.
Insert cylinder liners into crankcase and push them
down by hand.
Place clean metal plate on liner and exert uniform
downward pressure until the liner is seated in the
crankcase recess
If a perceptible resistance can be felt in this opera-
tion, the O-rings are no longer in their proper
place.
Reposition O-rings and insert cylinder liner again.
Note:
Measure cylinder liner protrusion after
installation of cylinder liners to ensure
that the O-rings are seated correctly.
Proceed sa follows:
Position press-on measuring plate with
turned collar facing the liner using 2 fitting
sleeves to centre plate.
Tighten 4 boltsimprovised: collar bolt
51.90020-0270, length shortened to 90
mm) n the press-on measuring plate in
stages and crosswise to 40 Nm.
Set dial gauge combination above press-
on plate to ”0” under preload relative to
the crankcase.
Measure cylinder liner protrusion at least
at four points.
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