BENDIX QRN-2 QUICK RELEASE VALVE 매뉴얼 - 페이지 3

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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

air dryer system or a dryer reservoir module, be

sure to drain the purge reservoir.

5. Following

the

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.

8. Use only genuine Bendix

components and kits. Replacement hardware,

tubing, hose, fittings, etc. must be of equivalent

size, type and strength as original equipment and

be designed specifically 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 specifically 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.

PREVENTIVE MAINTENANCE

Important: Review the Bendix Warranty Policy before

performing any intrusive maintenance procedures. A warranty

may be voided if intrusive maintenance is performed during

the warranty period.

No two vehicles operate under identical conditions, as a

result, maintenance intervals may vary. Experience is a

valuable guide in determining the best maintenance interval

for air brake system components. At a minimum, the QRN-2

valve should be inspected every 12 months or 3600 operating

hours, whichever comes first, for proper operation. Should

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the QRN-2

valve not meet the elements of the operational

tests noted in this document, further investigation and service

of the valve may be required.

vehicle

manufacturer's

replacement parts,

SERVICE CHECKS

1. Remove any accumulated contaminants. Visually

inspect the valve's exterior for cracks, gouges, or other

physical damage. Replace the valve if physical damage

is excessive.

2. Inspect all air lines connected to the valve for signs of

wear or physical damage. Repair/replace as necessary.

3. Test air line fittings for excessive leakage and tighten or

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replace as necessary.

OPERATIONAL AND LEAKAGE TESTS

1. Block the vehicle's wheels and fully charge the air

system.

2. Apply and release the service brakes several times and

check for prompt response of the brakes at the

appropriate wheels.

3. With the air system fully charged, apply a soap solution

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to the QRN-2

bubble in 5 seconds is permissible.

4. Make and hold a full brake application and again apply a

soap solution to the QRN-2

a 1" bubble in 3 seconds is permissible.

5. With the brakes still applied, apply a soap solution around

the valve where the exhaust cover meets the body. No

leakage at this point is permitted.

If the valve does not function as described, or if leakage is

excessive, replace it at any authorized parts outlet.

REMOVAL

1. Identify and mark or label all air lines and their

connections to the QRN-2

air lines.

2. Remove the QRN-2

mounting hardware.

INSTALLATION

1. Install the QRN-2

mounting hardware saved during removal.

2. Reconnect all air lines to the valve using the identification

made during removal.

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3. Test all air fittings for excessive leakage and tighten as

needed. NOTE: MAXIMUM TORQUE FOR FITTINGS

IS 10 FT. LBS. Perform OPERATIONAL AND LEAKAGE

TESTS before placing the vehicle back into service.

NOTE: THERE ARE NO DISASSEMBLY/ASSEMBLY

PROCEDURES FOR THE QRN-2

REPLACE ITEM. IF A VALVE DOES NOT MEET THE

OPERATIONAL AND LEAKAGE TESTS, IT SHOULD BE

REPLACED AT ANY AUTHORIZED PARTS OUTLET.

valve exhaust port. Leakage of a 1"

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valve exhaust. Leakage of

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valve. Then disconnect the

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valve from the vehicle. Retain the

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valve on the vehicle using the

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VALVE. IT IS A