Bendix® Cyclone DuraDrain™ Trailer Water Separator
SD-08-2402
DELIVERY PORT
“OUT”
PURGE NUT
WITH DRAIN
FIGURE 1 - CYCLONE DURADRAIN™ TRAILER WATER SEPARATOR
DESCRIPTION
The Cyclone DuraDrain™ trailer water separator can be
installed in the trailer control or in the supply line near the
.28 DIA.
MOUNTING
HOLES
SCREENS
SUPPLY PORT
“IN”
PURGE NUT WITH
CHECK VALVE
If water from a glad-hand enters the supply port and no
air pressure is applied, gravity will allow the water and
contaminants to drain through the purge nut drain port.
glad-hand. It removes water and contaminants that can
cause brakes to drag and improves the life of the trailer
system components.
OPERATION (See Figure 1)
GENERAL SAFETY GUIDELINES
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO A VOID PERSONAL
Compressed air enters the supply port of the Cyclone
DuraDrain™ trailer water separator. The air pressure
pushes down on the check valve contained in the purge
nut and closes the purge nut drain port. When air enters
the supply port of the Cyclone DuraDrain™ trailer water
separator a cyclonic action is created.
The cyclonic motion separates the oil, water and
particulates. The oil, water and particulates gravitate to the
™
bottom of the Cyclone DuraDrain
trailer water separator
where they collect. When the air pressure above the purge
nut check valve returns to atmospheric pressure, the check
valve moves up and off its seat. The contaminants then
drain through the purge nut drain port.
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
2. Stop the engine and remove ignition key when
DELIVERY PORT
“OUT”
SUPPLY PORT
“IN”
O-RING
DRAIN
parking brakes, and always block the wheels.
Always wear safety glasses.
working under or around the vehicle. When
working in the e ngine compar tment, t he engine
should be shut off and the ignition key should be
removed. Where ci rcumstances req uire that the
1
engine be in operation, EXTREME CAUTION should
be used to prevent personal injury resulting from
contact wi t h moving , rot ating, leaking , he at e d 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 wor k is being perfor med on the vehicle’s
air brake system, or any auxiliary pressurized air
systems, make cer tain to dra in the air pressure
from all reservoirs before beginning ANY work
on the vehicle. If t he 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 fro m t h e vehic l e.
6. Never exceed manufacturer’s recommended
pressures.
7. Never connect or disconnect a hose or line
containin g pressure; it may w hip. Never remove
a componen t or plug unless you are cer tain all
system pressure has been depleted.
8. Use only genuine Bendix® replacement parts,
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 speci fi cally st ated and a pproved
by the vehicle and component manufacturer.
10. Prior to returning the vehicle to ser vice, make
certain all components and systems are restored
to their proper operating condition.
11. 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 dr ive axle are lif ted off the groun d
and moving.
NUT
MOUNTING SPACER
FIGURE 2 - INSTALLATION
WASHER
(KIT 5014792) MOUNTING BOLTS
CYCLONE DURADRAIN
TRAILER WATER
SEPARATOR
™
REMOVAL
Disconnect both upstream glad-hands from the trailer or
dolly before beginning work on the Cyclone DuraDrain
trailer water separator.
1. Disconnect the supply and delivery line fi ttings.
2. Remove the mounting hardware, and spacer if
applicable, that secures the Cyclone DuraDrain™ trailer
water separator to the trailer frame rail.
™
INSTALLATION
A Cyclone DuraDrain™ trailer water separator can be
installed in the control and/or the supply line of the trailer
between the glad-hand and the fi rst valve in the trailer
system. See Figure 3 Trailer Schematic.
1. Identify the control and/or the supply line that the
Cyclone DuraDrain™ trailer water separator is to be
installed in. The trailer water separator should be
installed at the lowest point on the air line, but should
not be too low causing a dip in the air line. The Cyclone
DuraDrain™ trailer water separator must be installed
vertically with the purge nut pointing down to the ground
to allow for adequate draining.
2. Locate a mounting position on the trailer frame rail or
cross-member. Using the Cyclone DuraDrain™ trailer
water separator as a template, mark the location of the
mounting holes. Drill two mounting holes. Consult with
the trailer manufacturer prior to drilling any holes in the
frame rail or cross-member. If a mounting spacer is
used, install as shown in Figure 2. Secure using grade
2 or 5 mounting hardware.
3. Cut the air line and install a 3/8” NPT male fi tting at each
end. Connect the air lines to the supply and delivery
ports of the Cyclone DuraDrain™ trailer water separator.
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CYCLONE DURADRAIN™
TRAILER WATER
SEPARATOR
SPRING BRAKE
CONTROL
SUPPLY
PLACEMENT OF OPTIONAL
SUPPLY LINE CYCLONE
DURADRAIN™ TRAILER WA TER
SEPARATOR
FIGURE 3 - TRAILER SCHEMATIC
SR-5™ SPRING
BRAKE VALVE
SERVICE INTERVALS
Service intervals are dependent on specifi c environmental
and operational factors that control the amount of
contamination removed by the Cyclone DuraDrain™ unit.
Experience should be used to determine how frequently
the unit must be serviced. As a recommended minimum,
every 12 months, 100,000 miles or 3,600 operating hours,
perform the Operational and Leakage Tests. Inspect
the Cyclone DuraDrain™ unit for unrestricted airfl ow and
blockage from debris collection. Remove the purge nut
and service according to the “Disassembly and Cleaning”
instructions. If the purge nut is damaged or improperly
functioning, replace with the purge nut service kit.
OPERATIONAL AND LEAKAGE TESTS
Connect the tractor air lines to the trailer being tested.
Block all wheels or hold the vehicle by means other than
air brakes.
Supply Line (Emergency)
1. Build tractor and trailer to full system pressure by
placing the park control valve and the trailer air supply
valve in the charge position.
2. When full system pressure is reached, and the spring
brakes are fully released, apply a soap solution to the
supply and delivery ports of the Cyclone DuraDrain
trailer water separator. A 1” bubble in 5 seconds is
permissible.
Control Line (Service)
1. Build tractor and trailer to full system pressure by
placing the park control valve and the trailer air supply
valve in the charge position.
™
ABS UNIT OR
RELAY VALVE
2. When full system pressure is reached, and the spring
brakes are fully released, apply a soap solution to the
supply and delivery ports of the Cyclone DuraDrain™
trailer water separator. Apply the brakes and check for
leaks. A 1” bubble in 5 seconds is permissible.
DISASSEMBL Y AND CLEANING
Periodically inspect and clean the Cyclone DuraDrain™
trailer water separator. Do not disconnect or remove the
Cyclone DuraDrain™ body.
1. Disconnect both upstream glad-hands from the trailer or
dolly before beginning work on the Cyclone DuraDrain
trailer water separator. All servicing can be done
without disconnecting the air lines from the body.
2. Remove the 1-3/8” hex purge nut assembly with o-ring
from the bottom of the leaking Cyclone DuraDrain™
trailer water separator. Remove the o-ring from the
purge nut.
AIR CLEANING
A rubber pressure-activated valve is located under the
screen in the purge nut. The screen is permanently
installed and cannot be removed. Attempts to remove
the screen and access the pressure-activated valve will
damage the purge nut necessitating its replacement.
WARNING NOTE: an air gun blowing backward through
the drain hole in the bottom of the nut can dislodge the
pressure-activated valve necessitating replacement of
the purge nut.
The most common cause of air leakage is sandy debris on
the valve seat inside the purge nut. Dislodging and ejecting
the debris can restore leak-free operation.
™
3
3. Gently tap the purge nut upside down and sideways
to dislodge possible debris taking care not to damage
the screen.
7. Wash the hex purge nut in mineral spirits parts washer.
Flow solvent downward through the screen and out the
drain hole.
4. Blow air in the normal downward direction through the
screen to remove debris out the drain hole. Review
the warning note.
5. Inspect the o-ring for damage and replace if necessary.
Apply a small amount of barium grease to o-ring
and place it into the o-ring groove of the purge nut
assembly. Reinstall the purge nut into the Cyclone
™
DuraDrain
body . Important: Torque the purge nut to
150 ±10 in-lbs.
6. Reapply air pressure and determine if the leak has
been eliminated.
SOLVENT CLEANING
If air leakage was not eliminated by air cleaning, the purge
nut may be cleaned in a mineral spirits parts washer.
Repeat the removal procedure steps 1 and 2 before
proceeding.
8. For stubborn debris, the purge nut may be soaked
in the parts washer overnight to dissolve persistent
deposits.
9. Apply a small amount of barium grease to o-ring
and place it into the o-ring groove of the purge nut
assembly. Reinstall the purge nut into the Cyclone
™
DuraDrain
body . Important: Torque the purge nut to
150 ±10 in-lbs.
10. Reapply air pressure and determine if the leak has
been eliminated.
1 1. If the air leak persists, replace the entire purge nut with
Bendix service kit piece number 5013824.
Maintenance Kits ....... Piece No.
Purge Nut Service Kit ............5013824
Mounting Spacer Kit ..............5014792
4
BW2440 © 2010 Bendix Commercial Vehicle Systems LLC. All rights reserved. 5/2010 Printed in U.S.A.
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