Navistar International DT 466 Diagnostic/Troubleshooting Manual page 196

192
Figure 237 High-pressure oil hose with test
fittings installed
1. Air chuck
2. Shut-off valve
3. Fitting, 13/16-16 NPT
4. High-pressure hose
5. Oil level gauge
1. Install 13/16-16 NPT fitting, shut-off valve, and air
chuck fitting to high-pressure oil hose connected
to cylinder head.
WARNING: To avoid serious personal
injury, possible death, or damage to the
engine or vehicle, do the following:
• Install an inline shut-off valve.
If system does not leak when air is applied,
the system will maintain pressure.
When hose is removed, oil will be released
with air pressure.
• Use inline shut-off valve to control and
contain bleed-off pressure mixture (air and
oil).
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
2. Remove oil level gauge from oil fill tube.
3. Close shut-off valve.
4. Connect shop air supply line to test hose.
5. Apply 689 kPa (100 psi) of pressure. Slowly open
the shut-off valve.
6. Listen for an air leak in the crankcase through the
oil fill tube.
NOTE: Engines with engine brake option will have
a small amount of air passing through the system.
Air will pass through brake shut-off valve into the
brake oil gallery. The air will leak off through the
actuator pistons and the relief valve at the end of
the rail.
7. Record results on Diagnostic Form.
• If a leak is not heard, check previous test
results.
• If a leak is heard, check components under
the valve cover. Continue with step 8.
8. Close inline shut-off valve to stop air flow.
9. Remove the valve cover following procedures in
the Engine Service Manual.
EGES-270-1