4 ENGIN E SY M PTOMS DIAGNOSTICS 131
1. Remove and inspect the lube oil pump as
describedintheEngine Service Manual.
• Inspect the lube oil pump housing and plate
for gouging, deep scratches, or a discolored
hot-scored appearance.
• Inspect the gerotor gears for excessive wear
or damage.
• If no e xcessive damage is found, go to “Front
Cover Inspection” (page 131) in this section.
Front Cover Inspection
Figure 158 Front cover oil pressure leak
locations
1. Remove the front cover assembly (front half) from
the engine following the proce dure in the Engine
Service Manual. Inspect the front cover and front
cover gasket for damage. Repair or replace and
test.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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