Filter
Top Products
Dealer Service 17
MAN0155 (Rev. 2/16/2007)
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.
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.
DP3
Vent Plug
1. Seal
2. Pipe or tube
3. Seal seat
4. Casting
Pipe or tube must
press at outer edge
of seal
Incorrect
Installation