Installation; High-Pressure Oil Rail - Navistar INTERNATIONAL DT 466 Service Manual

Installation

High-pressure Oil Rail

1. Back off all valve lash adjustments. This must
be done to eliminate the possibility of additional
forces on the high-pressure oil rail when mounting
bolts are torqued.
CAUTION: To prevent engine damage, a new backup
ring and injector inlet seal must be installed on all six
injector oil inlet tubes.
CAUTION: To prevent engine damage,
installing new backup rings, a new backup ring must
match the backup ring removed from the injector oil
inlet tubes.
2. Inspect injector oil inlet adaptors for internal
O-ring extrusion and high-pressure oil leak
paths. Verify that each oil inlet tube is moveable.
Replace any adaptor having an extruded internal
O-ring, high-pressure oil leak path or seized oil
inlet tube.
Figure 643 Groove Measurement (M) in injector
oil inlet tube
3. Measure groove in the injector oil inlet tube.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
DIAMOND LOGIC® ENGINE BRAKE
when
EGES-265-2
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
Figure 644 Injector oil inlet adapter installed 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)
Table 53 Groove Measurement (M) in Oil Inlet
Tube and Required Backup Ring
Groove (M) in Oil Inlet
Tube
5.080 mm (0.200 in)
4.877 mm (0.192 in)
4.420 mm (0.174 in)
4. Install a new backup ring onto injector oil inlet
tubes, according to the groove measurements
listed in the table.
5. Install new injector inlet seal onto injector oil inlet
tubes.
6. Coat backup rings and injector oil inlet seals with
clean engine oil.
401
Backup Ring
Backup ring 1.8 mm
(0.07 in)
Backup ring 1.6 mm
(0.06 in)
Backup ring 1.1 mm
(0.04 in)