Bendix Commercial Vehicle Systems QR-L INLINE QUICK RELEASE VALV 3/04 User Manual
Page 3
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 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.
8.
Use only genuine Bendix
®
replacement parts,
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
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.
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
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
to the QRN-2
™
valve exhaust port. Leakage of a 1"
bubble in 5 seconds is permissible.
4. Make and hold a full brake application and again apply a
soap solution to the QRN-2
™
valve exhaust. Leakage of
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
™
valve. Then disconnect the
air lines.
2. Remove the QRN-2
™
valve from the vehicle. Retain the
mounting hardware.
INSTALLATION
1. Install the QRN-2
™
valve on the vehicle using the
mounting hardware saved during removal.
2. Reconnect all air lines to the valve using the identification
made during removal.
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
™
VALVE. IT IS A
REPLACE ITEM. IF A VALVE DOES NOT MEET THE
OPERATIONAL AND LEAKAGE TESTS, IT SHOULD BE
REPLACED AT ANY AUTHORIZED PARTS OUTLET.