FRONT COVER AND RELATED COMPONENTS 183
Figure 250 Installing the upper idler gear
mounting bolt
3. Install the upper idler gear and mounting bolt (M16
x 65) with timing marks facing outward. Align the
single marks on the camshaft gear and upper idler
gear and the dual marks on the lower idler gear
with those on the upper gaer. Tighten M16 x 65
bolt to the special torque value (Table 20), using
a 16 mm 12 point impact socket (Table 21).
4. Check gear backlash between upper idler gear
and camshaft gear. See Checking Camshft Gear
Backlash.
5. Check gear backlash between high-pressure
pump and upper idler gear (Table 19).
6. Check high-pressure pump end play.
7. Check camshaft end play.
NOTE: If equipped with an air compressor, check
gear backlash between air compressor drive gear
and lower idler gear.
8. If a Generation 1 front cover (rear half) is reused,
install wear plate onto the front cover (rear half)
and insert three flat head hex socket screws (M5).
Tighten screws to the special torque value (Table
20).
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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