BENDIX AD-9si 서비스 데이터 - 페이지 3

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DESCRIPTION

The function of both the Bendix

Bendix

AD-9si

PuraGuard

collect and remove air system contaminants in solid, liquid,

and aerosol form before they enter the brake system. The

AD-9si includes a spin-on style cartridge for easy servicing,

and most include a fully integrated governor to control air

system charging.

The air dryer provides clean, dry air to the components of

the brake system, which increases the life of the system

and reduces maintenance costs. The need for daily manual

draining of the reservoirs is eliminated.

The Bendix AD-9si PuraGuard oil coalescing air dryer has

an identical appearance to the standard Bendix AD-9si air

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

desiccant bed. This coalescing media provides a higher

level of oil removal over the standard AD-9si air dryer.

The AD-9si PuraGuard oil coalescing air dryer has all of

the same functions as the standard AD-9si air dryer and is

used in applications where lower oil concentration levels

are required.

IMPORTANT! When servicing, note that standard

AD-9si 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 document, AD-9si

air dryer refers to both the standard and PuraGuard oil

coalescing air dryer.

The AD-9si air dryer 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, integrated governor (in

most assemblies), threaded air connections, internal purge

volume, and purge valve assembly.

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 AD-9si air dryer. For

ease of maintenance, all replaceable assemblies should

be serviceable without removal of the air dryer from its

mounting on the vehicle – provided adequate clearance

exists between the air dryer and the vehicle components.

Refer to the Preventive Maintenance section of this

document.

AD-9si

air dryer and the

oil coalescing air dryer is to

BENDIX AD-9si AIR DRYER OPERATION:

GENERAL

(Refer to Figures 2 through 5.)

The Bendix AD-9si air dryer is designed to receive

compressed air from the vehicle air compressor, clean and

dry the air, deliver air to the vehicle's air reservoirs and

control the compressor/dryer charge cycle. The AD-9si

air dryer is available with an internal governor (Figures 2

and 3) or without an internal governor (Figures 4 and 5).

AIR DRYER OPERATION: GENERAL

The Bendix AD-9si air dryer alternates between two modes

or "cycles" during operation: the Charge Cycle and the

Purge Cycle. The following describes these "cycles" of

operation.

Air

Connection

Port ID

IN 1

Inlet Port (air in)

OUT 21

Delivery Port Out

PT 22

Extended Purge

CON 2-4

Governor Unloader

Governor Exhaust

Table 1 – Port Designations

Function/

Quantity

Connection