178 FRONT COVER AND RELAT ED COMPONENTS
Checking Camshaft Gear Backlash
Figure 242 Checking camshaft gear backlash
1. Dial indicator
2. Camshaft gear
NOTE: Pressure exerted by the valve train must be
relieved before doing the following procedure.
1. Clamp a dial indicator on the front cover or the
cylinder head if the dial indicator stand is magnetic
2. Place the tip of the dial indicator as tangent as
possible to a gear tooth and zero dial indicator.
3. Place a screwdriver between the upper idler gear
and the lower idler gear to keep the upper idler
gear from rotating.
4. Rotate the camshaft gear back and forth. Record
reading on the dial indicator face. If the backlash
exceeds specifications, replace camshaft gear.
Gerotor Oil Pump Clearance
Up to late Model Year 2006, all International® DT 466,
DT 570 and HT 570 Diesel Engines were equipped
with an 8 lobe gerotor oil pump.
Later in Model Year 2006, International® DT 466 (210
to 245 horsepower) Diesel Engines were equipped
with a 10 lobe gerotor oil pump.
NOTE: Inspection procedures for the gerotor oil
pump assembly show the 8 lobe gerotor oil pump.
Inspection procedures for the 10 lobe gerotor oil
pump are the same as for the 8 lobe gerotor oil pump.
Measuring Oil Pump Side Clearance
Figure 243 Oil pump side clearance
measurement
1. Feeler gauge
2. Oil pump and rotor housing
3. Outer rotor
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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