BENDIX 109337 Installation Instructions - Page 2

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IMPORTANT! PLEASE READ AND FOLLOW

THESE INSTRUCTIONS TO AVOID

PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following

general precautions should be observed at all times.

1. Park the vehicle on a level surface, apply the

parking brakes, and always block the wheels.

2. Stop the engine when working around the vehicle.

3. If the vehicle is equipped with air brakes, make

certain to drain the air pressure from all reservoirs

before beginning ANY work on the vehicle.

4. Following the vehicle manufacturer's recom-

mended procedures, deactivate the electrical

system in manner that removes all electrical

power from the vehicle.

5. When working in the engine compartment the

engine should be shut off. Where circumstances

require that the engine be in operation, EXTREME

CAUTION should be used to prevent personal injury

resulting from contact with moving, rotating, leak-

ing, heated, or electrically charged components.

6. Never connect or disconnect a hose or line con-

taining pressure; it may whip. Never remove a

component or plug unless you are certain all

system pressure has been depleted.

7. Never exceed recommended pressures and

always wear safety glasses.

8. Do not attempt to install, remove, disassemble or

assemble a component until you have read and

thoroughly understand the recommended proce-

dures. Use only the proper tools and observe all

precautions pertaining to use of those tools.

9. Use only genuine Bendix replacement parts,

components, and kits. Replacement hardware,

tubing, hose, fittings, etc. should be of equivalent

size, type, and strength as original equipment and

be designed specifically for such applications and

systems.

10. Components with stripped threads or damaged

parts should be replaced rather than repaired.

Repairs requiring machining or welding should

not be attempted unless specifically approved and

stated by the vehicle or component manufacturer.

11. Prior to returning the vehicle to service, make

certain all components and systems are restored

to their proper operating condition.

VEHICLE PREPARATION & REMOVAL OF THE TW-12

NOTE: It may not be necessary in some installations to

remove the TW-12 from the vehicle to service with the Cap

Nut Kit.

1. Apply the parking brake. Identify and disconnect the

supply, exhaust and delivery lines from the TW-12 and

plug the ends of each.

2. Disconnect the transmission lever linkage from the

TW-12 cam.

3. Remove the valve from the vehicle by removing the

mounting screws.

DISASSEMBLY

1. Using a 7/8" wrench remove and discard the Cap Nut(3),

O-ring(4), Inlet Valve Stop (2), Inlet Valve Spring(5) and

Inlet Valve(1).

ASSEMBLY

1. Prior to assembly lubricate bores, o-ring and threads

with lubricant BW-663-M (Lubriplate 930-2). Using the kit

contents install the Inlet Valve(1) into the supply port of

the valve body. Place the Inlet Valve Spring(5) over the

Inlet Valve(1). The Inlet Valve Stop (2) is then placed over

the Inlet Valve Spring.

2. Place O-ring(4) over the Cap Nut(3) as shown. With a

7/8" wrench secure the Cap Nut(3) into the body. Torque

to 50-150 inch pounds.

INSTALLATION

CAUTION: Do not fill reservoir with engine on. Due to the

complexity of the hydraulic park system, extensive bleeding

of the system is required.

1. Reinstall the valve and cover plate to mounting bracket

on the vehicle.

2. Remove plugs from the exhaust, delivery and supply

lines and connect each to its corresponding port.

CAUTION: When connecting the supply line secure the

Cap Nut with a 7/8" wrench to prevent overtorquing of

Cap Nut when tightening the supply line fitting.

3. Fill the brake pump reservoir.

4. With the vehicle wheels blocked, start the engine and

inspect for leaks. Release the parking brake. Turn the

engine off and bleed the chambers until they reach a full

application. Replenish the reservoir. DO NOT APPLY

THE PARKING BRAKE. Start the engine and run for 15

seconds, turn the engine off and bleed the chambers

until they reach a full application. Replenish the

reservoir.

5. With the engine on, cycle the valve every 20 seconds for

10 minutes. Release the brakes, turn the engine off,

bleed the chambers, apply the parking brake and

replenish reservoir to full mark.

TEST

Before placing the vehicle in service, check the system for

correct operation, possible leakage and properly filled

reservoirs.