Woods Equipment BW180XHD Dealer Service, Gearbox Maintenance - Style B, Seal Replacement Figure

GEARBOX MAINTENANCE - STYLE B

NOTE: Read this entire section (pages 29- 31) before starting any repair. Many steps are dependent on each other. See parts list on pages 62 thru 65 to determine gearbox style. Style "A" has a crowned top. Style"B" has a flat top.

1.Fill gearbox with SAE 80W or 90W gear lube. Proper oil level is between lowest ring and end of dipstick.

NOTE: Repair to this gearbox is limited to replac- ing bearings, seals, and gaskets. Replacing gears, shafts, and a housing is not cost effective. Pur- chasing 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.

NOTE: Bearing failure is indicated by excessive noise and side-to-side or end-play in gear shafts.

Seal Replacement (Figure 13)

Recommended sealant for gearbox repair is Permatex® Aviation 3D Form-A-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 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.

5.Carefully press seal into housing, avoiding distortion to the metal seal cage.

1.Seal

2.Pipe or tube

3.Seal seat

4.Casting

Pipe or tube must press at outer edge of seal.

Incorrect

Installation

Figure 13. Seal Installation

Vertical Shaft Seal Replacement

Refer to Figure 14, page 31.

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

2.Remove vent plug (24) and siphon gear lube from housing through this opening.

3.Remove crossbar (see page 36).

4.Remove protective seal (8) and vertical shaft seal (18). Replace seal (18) with new seal.

Vertical seal should be recessed in housing. Hori- zontal seal (19) should be pressed flush with out- side of housing.

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.

Horizontal Shaft Seal Replacement

Refer to Figure 14.

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

2.Remove vent plug (24) and siphon gear lube from housing through this opening.

3.If the leak occurred at either end of horizontal shaft, remove oil cap (20) and/or oil seal (19). Replace with new one.

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

MAN0963 (2/16/2012) Dealer Service 29