POWER CYLINDERS 235
Assembling Piston and Connecting Rod
Assembly
Figure 337 Installing piston rings (466 pis
ton
shown)
NOTE: Make sure that the top side of both
compression rings (marked with a dot) are
facing
up. The oil control ring may be installed
with either
side facing up, if new.
1. Use a piston ring expander tool (Tab
le 34) to install
the piston rings. Install the oil co
ntrol ring first,
then intermediate compression ri
ng, and finally
the top compression ring.
CAUTION: To prevent engine dam
age, orientation of
a reused piston skirt is very im
portant due to wear
patterns. Install the skirt o
n the crown using the
original skirt orientation
.
NOTE: New piston skirts may be
oriented in either
direction due to piston skir
tsymmetry.
Figure 338 Installing piston skirt on crown (570
engine only)
1. Skirt
2. Crown
2. For 570 engines only: Install the piston skirt on
the crown. Make sure that the oil jet cutouts on
the skirt are facing away from the crown.
3. Lubricate the piston pin bore with clean engine oil.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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