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WARNING! PLEASE READ AND FOLLOW

THESE

INSTRUCTIONS

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.

Always wear safety glasses.

2. Stop the engine and remove 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.

3. 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.

4. 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 an AD-IS

air dryer system or a dryer reservoir module, be

sure to drain the purge reservoir.

5. Following

the

recommended procedures, deactivate the electrical

system in a manner that safely removes all

electrical power from the vehicle.

6. Never exceed manufacturer's recommended

pressures.

7. Never connect or disconnect a hose or line

containing pressure; it may whip. Never remove a

component or plug unless you are certain all

system pressure has been depleted.

8. Use only genuine Bendix

components and kits. Replacement hardware,

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

size, type and strength as original equipment and

be designed specifically for such applications and

systems.

9. Components with stripped threads or damaged

parts should be replaced rather than repaired. Do

not attempt repairs requiring machining or welding

unless specifically stated and approved by the

vehicle and component manufacturer.

10. Prior to returning the vehicle to service, make

certain all components and systems are restored

to their proper operating condition.

11. For vehicles with Antilock 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.

AVOID

vehicle

manufacturer's

replacement parts,

Note: The Trailer System-Guard

remove moisture and other contaminants normally found in

the air brake system. Using alcohol, anti-freeze, oil or other

de-icing substances in the brake system can damage the

air dryer and will therefore void the Trailer System-Guard

air dryer warranty.

OPERATION & LEAKAGE TESTS

Build the air system to governor cutout. Shut off the engine.

Using a soap solution, check all lines and fittings leading to

and from the Trailer System-Guard

and integrity. Repair any excessive leaks - exceeding a 1"

bubble in 5 seconds-before restoring vehicle to service.

OPERATION: GENERAL

The trailer dryer works as a buffer, removing moisture during

exposure to wet air (trailer hooked to a tractor without an air

dryer, or trailer is parked for extended periods with open

glad hands) and giving up water vapor when reconnected to

a tractor equipped with an air dryer. The Trailer System-

Guard

™

air dryer depends on dry tractor air to remove water

vapor from the desiccant collected during wet times.

TRAILER SYSTEM-GUARD

REMOVAL

This removal process is presented for the replacement of

the Trailer System-Guard

™

1. Identify and disconnect the four air hoses from the Trailer

™

System-Guard

2. Remove the locknuts, washers and grommets that secure

the Trailer System-Guard

the vehicle.

REPLACING OR RETROFITTING THE TRAILER

SYSTEM-GUARD

The following instructions are presented for reference

purposes only, since Bendix aftermarket replacement Trailer

™

System-Guard

air dryers are packaged with the most up-

to-date installation instructions. The instructions packaged

with the Trailer System-Guard

in lieu of those presented here.

MOUNTING THE TRAILER

SYSTEM-GUARD

1. After positioning the Trailer System-Guard

according to the location requirements, mark the position

of the predrilled mounting holes on the selected location.

A template for the mounting pattern is included on page

Note: Only three of the four mounting holes

must be used for securing the air dryer to the frame

rail. Securing the air dryer at all four mounting holes

can lead to damage and eventual failure of the air dryer.

Any three of the four mounting holes can be used for

installation. Selection is at the discretion of the installer.

If mounting the dryer on a trailer cross member center

the template to maximize clearance and facilitate

installation. Note: Check the vehicle manual before

drilling the selected location.

™

air dryer is intended to

™

air dryer for leakage

™

AIR DRYER

™

air dryer.

™

air dryer and remove it from

™

AIR DRYER: GENERAL

™

air dryers should be followed

™

AIR DRYER

™

air dryer