Fav 900
Engine / Short block
Removing and refitting con-rod
G
Repair
Fav 900 chassis number 23/3001 and up
21.2.2001
2210
000009
G
a
2/5
Capitel
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Removing and refitting con-rod
PM-Picturemodule
PM-Picturemodule
PM-Picturemodule
PMTAB_Picture
Determining piston play
Measure cylinder inside diameter with an internal
micrometer at three levels (top to bottom) and
radially at 45
°
to each other. make a note of the
values. Verifiy diameter of the new piston from the
piston crown. Determine diameter of used pistons
with an external micrometer (measured from
lower edge of piston at right angles to pistons
axis; for dimension see Service data). Make a
note, subtract piston diameter from largest
measured cylinder diameter.
The resulting value is the piston clearance. If
clearance ist excessive cylinder liner and piston
must be replaced.
PMTAB_Picture
Refitting piston and con-rod
Note:
If, for whatever reason, pistons need to be
replaced, measure the piston diameter or read
dimension on piston crown to find out if
replacement pistons were fitted previously.
If so, use oversize pistons.
Apply a thin oil film to cylinder walls and pistons.
Note:
Use new con-rod shells.
Measure spread.
Thinly oil con-rod bearing shells and insert them
into con-rod big end.
Offset piston ring gaps by 120
°
,
Slide on piston ring clamp and compress piston
rings.
PMTAB_Picture
Insert piston and con-rod onto the cylinder,
making sure that piston, conrod and cooling oil
nozzle are assemled correctly.