Dealer Service 17 - Woods BRUSHBULL BB48XE Manuel D'utilisation

The information in this section is written for dealer service personnel. The
repair described here requires special skills and tools. If your shop is not prop-
erly equipped or your mechanics are not properly trained in this type of repair,
you may be time and money ahead to replace complete assemblies.

Before working underneath, disconnect driveline, raise cutter, lock in
transport position, and block cutter securely. Hydraulic system leak
down and failure of mechanical or hydraulic system can cause equip-
ment to drop.

Keep all persons away from operator control area while performing
adjustments, service, or maintenance.

Always wear relatively tight and belted clothing to avoid getting
caught in moving parts. Wear sturdy, rough-soled work shoes and protec-
tive equipment for eyes, hair, hands, hearing, and head; and respirator or
filter mask where appropriate.
GEARBOX MAINTENANCE
NOTE: Read this entire section before starting any repair. Many steps are
dependent on each other.
1.
Fill gearbox with SAE 80W or 90W gear lube until it runs out the side
level plug.
NOTE:
Repair to this gearbox is limited to replacing bearings, seals,
and gaskets. Replacing gears, shafts, and a housing is not cost effective.
Purchasing a complete gearbox is more economical.
2.
Inspect gearbox for leakage and bad bearings. Leakage is a very serious
problem and must be corrected immediately. Bearing failure is indicated
by excessive noise and side-to-side or end-play in gear shafts.
Seal Replacement
Recommended sealant for gearbox repair is Permatex
Gasket or equivalent.
Leakage can occur at the vertical or horizontal gaskets and shaft seals.
Leakage at the horizontal gasket or seal can be repaired without removing the
gearbox from the cutter.
Seal Installation
NOTE: Proper seal installation is important. An improperly 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.
MAN1254 (3/16/2018)
DEALER SERVICE
5.
Vertical Shaft Repair (Figure 18)
1.
2.
3.
4.
®
Aviation 3D Form-A-
5.
6.
Horizontal Leak Repair (Figure 18)
1.
2.
3.
4.
Carefully press seal into housing, avoiding distortion to the metal seal
cage.
Incorrect
Installation
Figure 17.
Seal Installation
Disconnect and remove the rear driveline from the gearbox.
Remove vent plug (27) and siphon gear lube from housing through this
opening.
Remove crossbar (see Crossbar Removal, page 19).
Remove vertical shaft seal (21). Replace with new seal (see Seal
Installation, page 17).
Vertical seal should be recessed in housing. Horizontal seal should be
pressed flush with outside of housing.
NOTE:
Distortion to seal cage or damage to seal lip will cause seal to
leak.
Fill gearbox with SAE 80W or 90W gear lube until it runs out the level
plug.
Remove and replace any seal damaged in installation.
Disconnect and remove the rear driveline from the gearbox.
Remove vent plug (27) and siphon gear lube from housing through this
opening.
If the leak occurred at either end of horizontal shaft, remove oil cap (23)
and/or oil seal (22). Replace with new one (refer to Seal Installation,
page 17).
Fill gearbox with SAE 80W or 90W gear lube until it runs out the level
plug.

Dealer Service 17