BENDIX M-40HF Servicegegevens - Pagina 2

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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,

The modulator consists of a die cast metal and plastic body

that houses one normally-open solenoid, one normally-

closed solenoid, and an inlet and exhaust diaphragm

valve. A three-pin weather-resistant electrical connector

is an integral part of the modulator solenoid assembly

and delivers the vehicle controller's commands to the

modulator. Two mounting holes are provided for frame or

crossmember mounting of the valve.

The Bendix

M-40QR

for the Bendix

Bendix M-40QR modulator has a bias valve to provide an

internal quick-release function.

The supply, delivery, and exhaust ports on the Bendix M-40

modulators have embossed identification codes.

Air Hose

Port ID

Connection

1, SUP

Supply

2, DEL

Delivery

3, EXH

Exhaust

Figure 3 - Port Designation and Function

air

APPLICATIONS

Bendix M-40

™

on a vehicle, including ABS and stability interventions. In

applications using these PMVs, an external quick release

valve may also be required, depending on the system

design. Where the modulator is used for individual wheel

control applications, it is typically the last control valve

through which air passes on its way to the service brake

actuator. See Figure 4 for a typical system schematic.

PRESSURE MODULATOR VALVE (PMV) AND

TRACTION CONTROL VALVE (TCV) CHUFF TEST

A wiring harness connects the vehicle modulators to the

controller. The ABS controller is able to simultaneously,

and independently, control the individual modulators.

Bendix

Electronic Control Units (ECUs) perform a Bendix-

patented PMV and TCV Chuff Test. The Chuff Test is

an electrical and pneumatic PMV test that can assist

maintenance personnel in verifying proper PMV wiring and

installation. This test is performed only when the vehicle

is stationary (if the vehicle moves, the Chuff Test will not

be performed).

NOTE: If there are any active Diagnostic Trouble Codes

(DTCs), the stop lamp cross-check portion of the Chuff Test

will not be carried out until all DTCs are fully diagnosed and

corresponding repairs are successfully conducted. The

ESP/ATC dash indicator lamp ATC/ESP Lamp – a lamp that

indicates when stability functions, including traction control,

modulator is the direct replacement

™

M-32QR

modulator (See Figure 2). The

™

Function

Air enters from a valve (typically

foot, relay, or quick release).

Air is delivered to the service

actuators.

Air is vented to the atmosphere.

modulators may be used for various purposes