BENDIX SD-08-2418 Manuel d'utilisateur télécharger pdf (Page 9)

BRAKING SYSTEM PROTECTION

The Bendix

AD-IS

air dryer allows the system to maintain

one brake circuit up to about 100 psi even after a pressure

loss in the other brake circuit. This allows a vehicle to

be moved (in an emergency), but with reduced braking

capacity. Compare this to a conventional system, where a

loss of pressure in one service tank leaves the vehicle with

a limited number of reduced braking capacity applications

before the parking brakes automatically apply and stay on.

See Bendix publication BW5057 "Air Brake Handbook."

ROADSIDE INSPECTION

In the event of a roadside inspection the system behavior

will be as follows: When the system is charged to governor

cut-out and then one reservoir drain valve is opened,

initially both reservoir gauges will fall; however, the Bendix

AD-IS

air dryer primary and secondary pressure protection

valves will close at pressures above 70 psi, protecting the

remaining brake circuit from further loss of pressure.

TEMPORARY AIR DRYER AND RESERVOIR

SYSTEM BYPASS

To temporarily bypass the air dryer, follow these procedures:

Adhere to the General Safety Guidelines outlined

elsewhere in this document.

Make sure that all residual pressure has been released and

the air dryer purge reservoir has been drained to 0 psi,

then remove the air supply line from the compressor to the

inlet port (1/IN). Remove the safety valve from the Bendix

AD-IS air dryer (see Figure 1 for location). Note that a short

puff of trapped air may vent from the safety valve port when

removing the valve. Install a T-tting into the port. Using

any adapters necessary, reinstall the safety valve in one of

the branches of the T-tting. Using any adapters necessary,

install the air supply line into the remaining T-tting port.

After testing the T-tting for any air leakage—by using a

soap solution after charging to system cut-out pressure (a

1” bubble in 10 seconds is acceptable)—the vehicle may

be returned to temporary service.

Note: This is a temporary bypass of the air dryer. Full

repair of the unit must be carried out at the earliest

opportunity.

With the air dryer removed from the system, contaminants

will be entering the air brake system: reservoirs will need to

be manually drained daily until the repairs are completed.

At the end of each working day, park the vehicle and slowly

drain pressure through the drain valves—leave open to

the atmosphere—for several hours, if possible. When

repairs are carried out, be sure to check that all reservoirs

(including the air dryer purge reservoir) are emptied of all

contaminants.

If, after bypassing the air dryer and reservoir system, the

system pressure still does not build, use the following

procedure to remove, clean, and reinstall the delivery

check valve.

Maintenance Kits

Kit Description Piece No.

Delivery Check Valve Replacement Kit 5004052

Desiccant Cartridge Replacement Kit (Standard) 5008414

Desiccant Cartridge Replacement Kit - Bendix

AD-IS

PuraGuard

air dryer (can be used to replace the standard

cartridge)

5008414PG

Drain Valve 5004961N

Governor and Check Valve Replacement Kit 5004049

Governor Gasket 5007834

Heater & Thermostat Replacement (12 volt) 109495

Heater & Thermostat Replacement (24 volt) 109496

Bendix

PuraGuard

Oil Coalescing Desiccant Cartridge

Service New Kit

K020366

Mounting Bolt Kit 5009233

Protective Boots (for pressure protection valves) 5005163

Safety Valve 800350

Splash Shield Kit (includes bracket and cover) K052469

Splash Shield Cover 5005266N

Silencer Kit K021189

Wiring Harness & Splice Kit 109871N

Purge Valve Assembly Type Configuration

Service Kit

Pc. No.

Purge Valve Assembly for

climate conditions above

-40°C (-40°F)

Bendix

AD-IS

Air Dryer K022105

AD-IS

EverFlow

Module

K031560

AD-IS

Discharge Line

Unloader

K031562

Arctic Purge Valve Assembly

for climate conditions of

-40°C to -50°C

(-40°F to -58°F)

AD-IS

Air Dryer K031559

AD-IS

EverFlow

Module

K031561

AD-IS

Discharge Line

Unloader

K031563

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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BENDIX SD-08-2418 Manuel d'utilisateur Page 9

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