4. Internal Components Cleaning and Inspection

Internal Components Cleaning and Inspection

Gears Cleaning and Inspection:

1. Inspect the idler gear (2) for wear, pitting, or discoloration by heat.





2. Inspect the drive and drivenshafts for worn or damaged gears (1).





3. Inspect the differential carrier and ring gear for the following:
^ Worn gears (1)
^ Damaged threads (2)
^ Scored, pitted, or damaged bearing (3)
^ Worn gear set or loose center pin (4)
^ Worn or loose gears (5)

Differential Carrier Assembly:

4. Inspect the gears (3) for abnormal wear.

Bearings and Shafts Cleaning and Inspection:

1. Inspect the flange sealing surface (1) for wear, damaged bolt threads (2) and worn or damaged splines (3).





2. Inspect the drive and drivenshafts for the following:
^ Worn gear teeth (1)
^ Worn or scored driveshaft sealing surface (2)
^ Worn or damaged splines (3)
^ Damaged threads (4)
^ Pitted, scored, or damaged bearings (5)

Differential Carrier Assembly:

3. Inspect the differential carrier gear needle bearings (4 and 6) for wear. Inspect for a worn or scored pin (9).

Fatique Spalling:

4. Inspect the bearing rollers and races for the following:
^ Pitting
^ Scoring or grooves
^ Excessive wear or other damage

Indentations:

5. Inspect the bearing rollers and races for heat discoloration. Heat discoloration ranges from a faint yellow to a dark blue color. This discoloration may result from an overload or improper lubrication. Excessive heat causes softening of the rollers and races. Bearings or races with a sign of heat discoloration must be replaced.

Bent Cage:

6. Inspect for a bent bearing cage.