Differential Case Cleaning and Inspection

Differential Case Cleaning and Inspection

Differential Case




Caution: Refer to Safety Glasses Caution in Service Precautions.

1. Clean the differential case in solvent.
2. Inspect the differential case for the following conditions:

* Chips or cracks
* Damage to the bolts holes (1)
* Unusual wear, grooves or scoring
* Damaged side bearing flanges (2)
* Heat discoloration
* Worn differential pin bores (3)




Caution: Refer to Safety Glasses Caution in Service Precautions.

3. Clean the pinion gear in solvent.
4. Inspect the pinion gear for the following conditions:

* Unusual gear teeth wear, pitting or heat discoloration (1)
* Pinion splines for wear, pitting or twisted splines (2)
* Pinion shaft thread condition (3)
* Ensure pinion gear end is not bent or burred over on the end (4)




Caution: Refer to Safety Glasses Caution in Service Precautions.

5. Clean the ring gear in solvent.
6. Inspect the ring gear for the following conditions:

* Damage to the threaded holes (1)
* Unusual wear or heat discoloration to the gear teeth (2)




Caution: Refer to Safety Glasses Caution in Service Precautions.

7. Clean the pinion flange in solvent.
8. Inspect the pinion flange for the following conditions:

* Splines for wear, pitting or twisting (1)
* Sealing surface for grooves or pitting (2)

Bearings and Races

Fatique Spalling:

1. Inspect the bearing rollers and races for the following conditions:

* Pitting
* Scoring or grooves
* Excessive wear or other damage

Indentations:

2. 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 sign of heat discoloration must be replaced.

Bent Cage:

3. Inspect for bent bearing cages.

Brinelling:

4. Inspect for damaged bearing cages.