400 DIAMOND LOGIC® EN GINE BRAKE
5. Loosen all high-pressure oil rail bolts (M8 x 90) in
a circular pattern beginning from either end.
High-pressure Oil Rail
WARNING: To prevent personal injury or
possible death, get assistance to remove or
install the high-pressure oil rail.
Figure 640 Removing the high-pressure oil rail
1. Remove all bolts and lift high-pressure oil rail
up just enough to drain as much oil out of
high-pressure oil rail before lifting it away from
cylinder head.
2. Clean outside of high-pressure oil rail using
appropriate solvent.
Figure 641 Oil inlet O-ring
3. Remove oil inlet O-ring from recess in cylinder
head and discard O-ring.
Figure 642 Injector oil inlet adapter inst
alled in
high-pressure oil rail
1. Injector oil inlet adaptor
2. Backup ring
3. Injector oil inlet seal
4. Oil inlet tube
5. Internal O-ring (not serviceable)
NOTE: It is not necessary to remove an inje
ctor oil
inlet adaptor to install a new backup
ring and injector
inlet seal.
4. Removeanddiscardbackupringandin
jector
inlet seal from injector oil inlet a
dapters in the
high-pressure oil rail.
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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