BENDIX SD-08-2418 Manuel d'utilisateur télécharger pdf (Page 3)

DESCRIPTION

The function of both the Bendix

AD-IS

(Integrated Solution

Air Dryer) air dryer and reservoir system and the Bendix

AD-IS

PuraGuard

oil coalescing air dryer and reservoir

system is to collect and remove air system contaminants

in solid, liquid and aerosol form before they enter the brake

system and to provide—as a module—heavy vehicles with

an integrated vehicle air dryer, purge reservoir, governor

and a number of the charging valve components in a

module. These components have been designed as an

integrated air supply system.

Both air dryer and reservoir systems provide clean, dry air

to the components of the brake system which increases

the life of the system and reduces maintenance costs.

The necessity for daily manual draining of the reservoirs

is eliminated.

The Bendix AD-IS PuraGuard oil coalescing air dryer has

an identical appearance to the standard Bendix AD-IS air

dryer, but contains a coalescing media at the inlet of the

desiccant bed. The coalescing media provides a higher

level of oil removal over the standard AD-IS air dryer.

The AD-IS PuraGuard oil coalescing air dryer has all of

the same functions as the standard AD-IS air dryer and is

used in applications where lower oil concentration levels

are required.

IMPORTANT: When servicing, note that standard AD-IS

air dryers or air dryer cartridges may be serviced with

PuraGuard oil coalescing air dryers or cartridges, however,

PuraGuard oil coalescing air dryers or cartridges must only

be serviced with like replacements.

Note: Unless otherwise stated in this manual, AD-IS air

dryer and reservoir systems refers to both the standard and

PuraGuard

oil coalescing air dryer and reservoir systems.

The function of the pressure protection valves is to protect

each reservoir from a pressure loss in the other reservoir or

a pressure loss in an air accessory. Each of the pressure

protection valves in the AD-IS

air dryer and reservoir

systems may have different pressure settings. These are

factory set and must not be changed or adjusted.

The air dryer and reservoir system consists of a “spin on”

desiccant cartridge secured to a base assembly. The

base assembly contains a delivery check valve assembly,

safety valve, heater and thermostat assembly, pressure

protection valves, threaded air connections and the purge

valve assembly.

TABLE 1 - PORT DESIGNATIONS

Air Connection

Port ID

Function/

Connection

QTY

Inlet Port (air in) 1

PRI

Delivery Port Out (to Primary Reservoir) 1

SEC

Delivery Port out (to Secondary Reservoir) 1

AUX 1

Auxiliary Delivery Port (air out) 4

AUX 2

Auxiliary Delivery Port (air out) 1

UNL Unloader Control Air (D-2A

™

Governor) 2

RES Common Reservoir Pressure (D-2A

™

Governor) 2

EXH Governor Exhaust 1

The removable purge valve assembly incorporates the

purge valve mechanism and a turbocharger cut-off feature

that is designed to prevent loss of engine “turbo” boost

pressure during the purge cycle of the Bendix

AD-IS

air

dryer and reservoir system. For ease of maintenance, all

replaceable assemblies can be serviced without removal

of the air dryer and reservoir system from its mounting on

the vehicle. Refer to Preventive Maintenance section.

BENDIX AD-IS AIR DRYER AND RESERVOIR

SYSTEM OPERATION: GENERAL

(Refer to Figure 2.)

The Bendix AD-IS air dryer and reservoir systems are

designed to receive compressed air from the vehicle air

compressor, clean and dry the air, deliver air to the vehicle’s

primary reservoir, secondary reservoir and accessories,

and control the compressor/dryer charge cycle.

The AD-IS air dryer and reservoir system alternates

between two modes or “cycles” during operation: the

Charge Cycle and the Purge Cycle. The following describes

these “cycles” of operation.

1 2 3 4 5 6 7 8 ... 15 16

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BENDIX SD-08-2418 Manuel d'utilisateur Page 3

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