Driveline Support Assembly Cleaning and Inspection

Driveline Support Assembly Cleaning and Inspection

Special Tools

J 7872 Magnetic Base Dial Indicator Set




1. Clean all bolts and bolt holes of threadlocking material.
2. Clean the components in solvent.

Warning

Wear safety glasses in order to avoid eye damage.

3. Dry the components with compressed air.
4. Inspect the hub for the following conditions:

* Damaged bolt hole threads (1)
* Damaged snap ring grooves (2)
* Worn splines (3)
* Worn or scored surface (4)
* Worn or damaged bushing




5. Inspect the couplings for the following conditions:

* Loose or damaged inserts (1)
* Worn, cracking, or deteriorated rubber (2)
MINOR cracking of the rubber is normal and acceptable. If the cracks expose any frayed fabric or internal windings, replace the coupling.




6. Inspect the propeller shaft for the following conditions:

* Damaged bolt hole threads (1)
* Loose or missing balance weights (2)
Balance weights may have been installed and removed during the balancing process. In those cases, a weld mark will remain on the propeller tube.
Inspect the inside of the driveline support tube for a missing balance weight.
* Dented or damaged propeller shaft tube (3)
* Worn, bent, loose, or damaged pins (4)




7. Inspect the propeller shaft pins for proper installation. The pin should extend beyond the flange 30 mm (1.18 in).




8. Measure the propeller shaft runout.

1. Mount the propeller shaft in wooden V-blocks or between centers on a fixture.
2. Inspect the runout of the propeller shaft in multiple locations, including the barrel ends, using the J 7872 .
3. If propeller shaft runout exceeds 0.3 mm (0.118 in), the propeller shaft is bent and should be replaced.




9. Inspect the flex plate spindle for the following conditions:

* Damaged bolt hole threads (1)
* Damaged snap ring grooves (2)
* Worn or damaged splines (3)
* Damaged threads (4)




10. Inspect the input hub for the following conditions:

* Worn or damaged splines (1)
* Damaged bolt hole threads (2)




11. Inspect the bearing housing for the following conditions:

* Damaged O-ring or snap ring grooves (1-2)
* Damaged threads (3)
* Worn or scored bearing bores