Oil Pump Inspection - Navistar International DT 466 Diagnostic/Troubleshooting Manual

130
Figure 154 Piston cooling tube
2. Remove oil pan following the procedure in the
Engine Service Manual.
3. Inspect for missing, loose, plugged or damaged
oil pickup tube, pickup tube gasket, piston cooling
tubes, bearing inserts, and cam bushings.
• If unable to identify any damaged parts, Go to
"Pressurized Oil System Leak Inspection" in
this section.
Figure 155 Old piston cooling tube
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
4 ENGINE SYMPTOMS DIAGNOSTICS
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Figure 156 New piston cooling tubes
1. New piston cooling tube (unknurled) – DT 466
engines
2. New piston cooling tube (knurled) – DT 570 and HT
570 engines
NOTE: The piston cooling tube was redesigned. The
new piston cooling tube is lighter and structurally
stronger. The piston cooling tubes with knurling are
used on the HT 570 and DT 570 engine. The piston
cooling tubes without knurling are used on the DT
466 engine.

Oil Pump Inspection

Figure 157 Oil pump housing cover
1. Outer gerotor
2. Oil pump housing plate
3. Inner gerotor
4. Oil pump housing