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GENERAL SAFETY GUIDELINES

WARNING! PLEASE READ AND

FOLLOW THESE INSTRUCTIONS

TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following

guidelines should be observed AT ALL TIMES:

▲Park the vehicle on a level surface, apply the parking

brakes and always block the wheels. Always wear personal

protection equipment.

▲Stop the engine and remove the ignition key when working

under or around the vehicle. When working in the engine

compartment, the engine should be shut off and the ignition

key should be removed. Where circumstances require that

the engine be in operation, EXTREME CAUTION should be

used to prevent personal injury resulting from contact with

moving, rotating, leaking, heated or electrically-charged

components.

▲Do not attempt to install, remove, disassemble or

assemble a component until you have read, and thoroughly

understand, the recommended procedures. Use only the

proper tools and observe all precautions pertaining to use

of those tools.

▲If the work is being performed on the vehicle's air brake

system, or any auxiliary pressurized air systems, make

certain to drain the air pressure from all reservoirs before

beginning ANY work on the vehicle. If the vehicle is

equipped with a Bendix

DRM

dryer reservoir module, or a Bendix

™

dryer, be sure to drain the purge reservoir.

▲ Following the vehicle manufacturer's recommended

procedures, deactivate the electrical system in a manner

that safely removes all electrical power from the vehicle.

▲Never exceed manufacturer's recommended pressures.

▲Never connect or disconnect a hose or line containing

pressure; it may whip and/or cause hazardous airborne

dust and dirt particles. Wear eye protection. Slowly open

connections with care, and verify that no pressure is

present. Never remove a component or plug unless you are

certain all system pressure has been depleted.

▲ Use only genuine Bendix

components and kits. Replacement hardware, tubing, hose,

ﬁ ttings, wiring, etc. must be of equivalent size, type and

strength as original equipment and be designed speciﬁ cally

for such applications and systems.

▲Components with stripped threads or damaged parts should

be replaced rather than repaired. Do not attempt repairs

requiring machining or welding unless speciﬁ cally stated

and approved by the vehicle and component manufacturer.

▲Prior to returning the vehicle to service, make certain all

components and systems are restored to their proper

operating condition.

▲ For vehicles with Automatic Traction Control (ATC), the ATC

function must be disabled (ATC indicator lamp should be

ON) prior to performing any vehicle maintenance where

one or more wheels on a drive axle are lifted off the ground

and moving.

▲The power MUST be temporarily disconnected from the

radar sensor whenever any tests USING A DYNAMOMETER

are conducted on a vehicle equipped with a Bendix

Wingman

system.

▲You should consult the vehicle manufacturer's operating

and service manuals, and any related literature, in

conjunction with the Guidelines above.

AD-IS

air dryer system, a Bendix

AD-9si

brand replacement parts,

OPERATION

The TLV-9000

2 flow positions) electro-pneumatic valve that directionally

controls the raising and lowering of the lift axle via an

electronic signal from the Bendix

(Antilock Braking System / Trailer Roll Stability Program)

Electronic Control Unit (ECU) based on pressure sensing.

The valve allows the lift axle to be raised and lowered via

a 12 VDC command using a standard wiring harness to

either exhaust the suspension bags and fill the lift bags or

exhaust the lift bags and fill the suspension bags.

The valve, while in a non-voltage applied state, delivers

supply pressure to the suspension bags only, providing a

ground position for the lift axle. When the lift axle is in the

down position, an internal piston prevents pressure from

being applied to the lift bags with its circuit open to exhaust.

Refer to Figures 2 and 5.

air

(Solenoid is in Ground State)

Figure 2 – Suspension Delivery Position (Lift Axle Down

and in Normal State)

In the applied voltage state, the valve's solenoid opens and

allows air pressure to compress the internal piston spring

changing the operation of the valve. During this function,

the piston redirects the pressure from the suspension bags

and now delivers pressure to the lift bags. The suspension

bag circuit opens to exhaust and the lift axle is now in the

raised position. Refer to Figures 3 and 6.

Figure 3 – Lift Bag Delivery Position (Lift Axle in Raised

State)

lift axle valve is a 5/2 way (5 ports and

™

trailer ABS/TRSP

Power OFF

Power ON

(Solenoid is Energized)