Seal Replacement Figure, Seal Installation

Vent Plug

DP3

Figure 11. Gearbox and Driveline

Seal Replacement (Figure 12)

Recommended sealant for gearbox repair is Perma- tex® Aviation 3D Form-A-Gasket or equivalent

Leakage can occur at the input or output gaskets and shaft seals.

Seal Installation

NOTE: Proper seal installation is important. An improp- erly installed seal will leak.

1.Clean area in housing where seal outer diameter (OD) seats. Apply a thin coat of Permatex®.

2.Inspect area of shaft where seal seats. Remove any burrs or nicks with an emery cloth.

3.Lubricate gear shaft and seal lips.

4.Place seal squarely on housing, spring-loaded lip toward housing. Select a piece of pipe or tubing with an OD that will sit on the outside edge of the seal but will clear the housing. Tubing with an OD that is too small will bow seal cage and ruin seal.

Carefully press seal into housing, avoiding distor- tion to the metal seal cage.

Incorrect

Installation

1.Seal

2.Pipe or tube

3.Seal seat

4.Casting

Pipe or tube must press at outer edge of seal

Figure 12. Seal Installation

Output Shaft Repair

Refer to Figure 13.

1.Disconnect and remove the rear driveline from the gearbox.

2.Remove vent plug (21) and siphon gear lube from housing through this opening.

3.Remove cutting wheel (see Remove Hub, page 16).

4.Remove cutting wheel shaft seal (17). Replace with new seal (see Seal Installation, page 17).

This seal should be recessed in housing. Front seal should be pressed flush with outside of hous- ing.

NOTE: Distortion to seal cage or damage to seal lip will cause seal to leak.

5.Fill gearbox with SAE 80W or 90W gear lube until it runs out the level plug.

6.Remove and replace any seal damaged in installation.

MAN0155 (Rev. 2/16/2007)	Dealer Service 17