Dealer Service 29; Gearbox Maintenance - Woods BW10.52 Operator's Manual

Rotary cutter

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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 performing any service or maintenance,

follow these steps:

•

Disengage power to equipment and wait for

all moving parts to stop.

•

Lower all raised components to the ground

and operate valve levers to release any hy-

draulic pressure.

•

Place all controls in neutral and set parking

brake.

•

Stop tractor engine, remove ignition key and

unfasten seat belt.

■ 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

safety glasses or goggles, sturdy, rough-soled

work shoes, gloves, and hearing protection.

Respiratory protection may be required, de-

pending on the work.

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 with an

API service rating of GL-4 or GL-5. Proper oil level

is between lowest ring and end of dipstick.

NOTE: Repair to this gearbox is limited to replacing

bearings and seals. Replacing gears, shafts, and

a housing is not cost effective. Purchasing a com-

plete 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 shaft seals.

Leakage at the horizontal 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 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 11. Seal Installation