Dealer Service 25; Gearbox Maintenance - Woods BATWING BW15.61 Operator's Manual

Rotary cutter

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Table Of Contents

Table of Contents

The information in this section is written for dealer ser-

vice personnel. The repair described here requires

special skills and tools. If your shop is not properly

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

instructions, securely block up, and check sta-

bility. Secure blocking prevents equipment from

dropping due to hydraulic leak down, hydrau-

lic system failure, or mechanical component

failure.

■ 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 re-

pair. Many steps are dependent on each other.

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 re-

placing bearings, seals, and gaskets. Replacing

gears, shafts, and a housing is not cost effec-

tive. Purchasing a complete gearbox is more

economical.

2. Inspect gearbox for leakage and bad bearings.

Leakage is a very serious problem and must be cor-

rected immediately.

NOTE: Bearing failure is indicated by excessive

noise and side-to-side or end-play in gear shafts.

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DEALER SERVICE

WARNING

underneath,

read

manual

CAUTION

Seal Replacement (Figure 10)

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 re-

paired 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 distor-

tion 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

CD1092

Figure 10. Seal Installation