Idler Gear Overhaul

PREPARATION





Special Service Tool Required


DISASSEMBLY





NOTE: Disassemble in the order shown.

Locknut

NOTICE: Use protective plates in the vise to prevent damage to the SST.





1. Secure the idler shaft in a vise with the SST, and remove the locknut.

Bearing Outer Race





1. Remove the bearing outer race from the idler gear with the SST (or equivalent)

INSPECTION
1. Inspect all parts and repair or replace as necessary.

ASSEMBLY

NOTE: Assemble in the reverse order of disassembly, refering to the following:





1. Press the bearing outer races in with the SST (or equivalent).





2. Install the idler gear bearing onto the idler shaft, then install the idler gear, adjustment shims, spacer, and bearing.

NOTICE: Use protective plates in the vise to prevent damage to the SST.





3. Secure the idler shaft in a vise with the SST and tighten the locknut to the lower limit of the tightening torque.

Tightening torque: 95 - 130 ft. lbs. (128 - 176 Nm)

NOTICE: Use protective plates in the vise to prevent damage to the idler gear.

4. Check and adjust the idler gear bearing preload.





A. Turn the idler gear assembly and SST over and secure the gear in the vise.
B. Attach the SST and spring scale or torque wrench and measure the preload while tightening the locknut.

NOTICE: Read the preload when the idler shaft is rotating.

Tightening torque: 95 - 130 ft. lbs. (128 - 176 Nm)
Preload: 0.27 - 7.8 inch lbs. (0.03 - 0.8 Nm)





NOTICE:
- The maximum allowable number of shims is 7.
- Preload is reduced by increasing the thickness of the shims, or increased by reducing the thickness.








5. If the specified preload cannot be obtained within the specified tightening torque, adjust by selecting the proper adjustment shims.