Service Manual

Accessory Drive ISB, ISBe and QSB (Common Rail [...]
Page 9-2 Section 9 - Drive Units - Group 09
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NOTE: Make sure the oil supply hole in the accessory
drive housing is open and free of debris.
Inspect the accessory drive housing for cracks.
Inspect the accessory drive gear and shaft splines for
cracks, broken teeth, and other damage.
NOTE: If there is damage to the accessory drive gear
teeth or there are signs of excessive heat, make sure to
inspect the associated camshaft and fuel pump gears for
damage. Measure camshaft gear backlash upon
installation.
Replace any damaged components. See the Disassemble
step of this procedure.
NOTE: Make sure the oil supply hole in the gear housing
is open and free of debris.
Inspect the inside diameter of the drive gear bore for
excessive wear or damage; replace if necessary.
Disassemble
If damage was found to a component of the accessory
drive during the Clean and Inspect for Reuse step, the
following components of the accessory drive, if damaged,
may be replaced by disassembling the accessory drive.
1 Accessory Drive Shaft
2 Accessory Drive Housing
3 Accessory Drive Bearing
4 Accessory Drive Gear
NOTE: Before disassembling the accessory drive, check
to make sure the parts for the specific accessory drive
being serviced are available. If not, replace the accessory
drive as an assembly.
Use a hydraulic press and proper support to disassemble
the accessory drive in the following order.
1 Press the drive shaft from the drive gear and housing
2 Press the bearing from the housing.