BENDIX DUAL RELAY VALVE 매뉴얼 - 페이지 3

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2. Inspect all air lines connected to the Dual Relay Valve

for signs of wear or physical damage. Replace as

necessary.

3. Test air line ﬁ ttings for excessive leakage and tighten

or replace as necessary.

4. Perform the Leakage Test described in this manual.

Every year, 100,000 miles, or 3,600 operating hours:

1. Perform the Operation and Leakage Tests described

in this manual.

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 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

a dryer reservoir module, be sure to drain the purge

reservoir.

5. Following the vehicle manufacturer's 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.

air dryer system or

8. Use only genuine Bendix

components and kits. Replacement hardware, tubing,

hose, ﬁ ttings, etc. must be of equivalent size, type

and strength as original equipment and be designed

speciﬁ cally 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

speciﬁ cally 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.

OPERATION & LEAKAGE TESTS

LEAKAGE TESTS

1. Fully charge the air system making certain that the rear

service reservoir is fully charged.

2. With the system fully charged, check for leakage at the

rubber exhaust ﬂ ap of the valve. Coat the exhaust ﬂ ap

with a soap solution. A 1 inch bubble in not less then 3

seconds is permitted (175 sccm max.).

3. Make a full brake application and hold it while checking

for leakage at the rubber exhaust port check of the

valve. Coat the exhaust port with soap solution. A 1

inch bubble in not less then 3 seconds is permitted

(175 sccm max.).

OPERATION TESTS

General

To complete the operational tests two accurate test gauges

and the appropriate ﬁ ttings to "tee" the gauges into the

various lines are required. Testing requires that one gauge

be installed and remain in the line connected to the delivery

port 22 throughout the operational testing. The second

gauge will be alternately installed in the primary control line

leading to port 41 and the secondary control line leading

to port 42.

1. Install the gauge in the delivery line leading to port

22.

2. Install the gauge in the primary control line leading to

port 41.

3. Remove and PLUG the line leading to the secondary

control port 42.

replacement parts,