BENDIX PURAGUARD QC SYSTEM FILTER User manual

1
®
SD-08-187B
Bendix®PuraGuard QC™Oil Coalescing Filter
DESCRIPTION
The PuraGuard QC™oil coalescing filter provides purified
compressed air on any air braked vehicle. It consists of a
spin-onhousing,orcartridge,mountedtoanaluminumbody.
Thespin-oncartridgecontainsadrainvalveformaintenance.
For ease of serviceability, the spin-on cartridge can be
removedwithoutdisconnectingthesupplyand deliverylines
ofthePuraGuard QC™oilcoalescing filterfrom its mounting
onthe vehicle.
Vehicles operate best with clean,dry compressed air. The
PuraGuardQC™oilcoalescingfilter removesapproximately
90% of oil aerosols and particulates down to 1 micron in
size, but it must be used in a system with and follow an air
dryer.
OPERATION
GENERAL(See Figure 2)
Compressed air passes through the supply port of the
PuraGuardQC™oil coalescing filter andtravels downward
through the center of the filter element. As the air passes
throughthe filter material, oil in liquidand aerosol form are
removed and collected in the sump. The PuraGuard QC™
filter also collects solid particles 1 micron and larger. The
cleaned air travels back up from the sump, through the
delivery port and into the air system.
FIGURE2 -CUT-AWAYSHOWINGAIRFLOW
SEAL
SUPPLY
PORT
FIGURE1 - PURAGUARD QC™OIL COALESCING FILTER
DELIVERY
PORT
SUPPLY
PORT
TOP
VIEW
ONE SUPPLY & ONE DELIVERY PORT
(SEE ARROW SYMBOL ON THE BODY
FOR AIR FLOW)
DRAIN VALVE
MOUNTING
BRACKET PURAGUARD
BODY
SPIN-ON
CARTRIDGE
EXTERIOR
VIEW
SPRING
FILTER
DELIVERY
PORT
SPRING
LOCATOR DRAIN PORT
1 SUP
2 DEL

2
4. Perform the Operation & Leakage Tests listed in this
publication.
Every 3,600 operating hours, 100,000 miles or one (1)
year:
1. With the air system pressure at 0 p.s.i., drain collected
contaminantsfor disposal.
2. Visually check for physical damage to the PuraGuard
QC™filter such as chaffed or broken air hoses and
broken or missing parts.
3. Replace the cartridge (see Maintenance Kits, Figure
5). Donot use the drain valve to remove the cartridge.
4. Check mounting boltsfor tightness. Re-torque to 160-
200in-lbs.
5. Perform the Operation & Leakage Tests listed in this
publication.
The PuraGuard QC™oil coalescing filter has two female
pipe thread air connections: one supply, one delivery —
identifiedby their relationshipto the arrowsymbol showing
air flow on the PuraGuard QC™filter top (see Figure 1).
Note: The PuraGuard QC™filter is not recommended to be
usedinconjunctionwithanalcoholevaporatororinjector. The
PuraGuard QC™oilcoalescing filterwill remove theliquid or
aerosol alcohol introduced, defeating the purpose of the
evaporator/injectorandrequiringthesumptobedrainedmore
oftenthan normal.
FILTER BYPASS (refer to Figure 4)
Ifa situation occurswhere the ability ofthe filter toallow air
to pass is impaired and causes a pressure difference of
approximately 20 p.s.i. between the air entering the filter
element and exiting, the filter will move downward against
thespring. The air entering will then be ableto bypass the
filterelement.
PREVENTIVE MAINTENANCE
Important: Review the warranty policy before performing
anyintrusivemaintenanceprocedures.Anextendedwarranty
maybe voided ifintrusive maintenanceis performedduring
this period.
Becausenotwovehiclesoperate underidenticalconditions,
maintenance intervals will vary. Experience is a valuable
guide in determining the best maintenance interval for a
vehicle.
Every 300 operating hours, 8,000 miles or one (1)
month:
1. With the air system pressure at 0 p.s.i., use the drain
valveto collectcontaminants for disposal. Donot open
thevalve beyond shoulder stop. This could loosen the
handle.
2. Visually check the PuraGuard QC™filter for broken or
missing parts.
3. Checkmountingboltsfortightness. Re-torquetovehicle
manufacturersguidelines.
FIGURE 4 - BYPASS
FILTER MOVES
DOWNWARDS
AGAINST
SPRING
FORCE
FIGURE3- PURAGUARD QC™OILCOALESCING FILTERINSTALLATION SYSTEM WITHAIR DRYER
PuraGuard QC™ oil coalescing filter
Air Dryer
Governor
Air
Compressor Supply
Reservoir
Primary
Reservoir
Secondary
Reservoir
SPRING
SHOULDER
STOP

3
OPERATION & LEAKAGE TESTS
Buildtheair systemtogovernor cutout. Shutoff theengine.
Using a soap solution, check all lines and fittings leading
to and from the PuraGuard QC™filter for leakage and
integrity. Repair any excessive leaks — exceeding a 1
inch bubble in 5 seconds — before restoring vehicle to
service.
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID
PERSONAL INJURYOR 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
enginebe in operation, EXTREME CAUTIONshould
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. Useonly 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,makecertaintodraintheairpressurefrom
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
recommendedprocedures,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.
PURAGUARD QC™OIL COALESCING FILTER
REMOVAL
ThisPuraGuard QC™filterremoval processis presented in
the event it becomes necessary to replace the entire
coalescingfilter.
Normalservice and parts replacement does not require
removal of the PuraGuard QC™filter from the vehicle.
1. Parkthevehicleonalevelsurfaceandpreventmovement
by means other than the brakes.
2. Drain all reservoirs to 0 p.s.i.
3. Identify and disconnect the two air hoses from the
PuraGuardQC™filter.
4. Remove the two bolts that secure the bracket to the
vehicle,and remove thePuraGuard QC™filter from the
vehicle.
REPLACING OR RETROFITTING THE
PURAGUARD QC™OIL COALESCING FILTER
General
Thefollowingretrofitinstructionsarepresentedforreference
purposes only since Bendix aftermarket retrofit and
replacementPuraGuard QC™filter systems are packaged
with the most up-to-date installation instructions. The
instructions packaged with the filter should be followed in
lieuof those presented here.
ASSEMBLY
1. Thetopofthesystem filter hasanarrowsymbolshowing
theairflowdirection(see figure1). Securethemounting
bracket to the body and spin-on cartridge.
RETROFIT: LOCATING THE PURAGUARD
QC™FILTER ON THE VEHICLE
1. The PuraGuard QC™filter must be mounted vertically
(±5°) and must not be exposed to direct wheel splash
(located behind axle mud flap is acceptable).
2. Locate it as close to the first (supply) reservoir as
possibleandupstreamofthesupplyreservoir(seefigure
3).
3. Tominimize vibration, mount the PuraGuard QC™filter
on a frame rail. If the vehicle requires the filter to be
directly mounted to the reservoir, be sure to only use a
high strength nipple fitting. (See further notes under
Connecting the Air Hoses.)

4
4. Do not locate the PuraGuard QC™filter near heat
producingcomponentssuch asthevehicle exhaustand
provideadequate clearance from moving components
e.g. drive shaft, suspension, pitman arm, etc.
5. Locatethe PuraGuard QC™filter onthe vehicle so that
a minimum of 12 inches of clearance is available
horizontally(90° minimum arc) to allowservicing. This
will permit a strap wrench to be used when replacing
thefilter.
6. Be sure that there is sufficient room to attach hoses to
thePuraGuard QC™filter.
7. Topermit draining of collected contaminants,at least a
6 inch clearance below the filter is recommended.
Nominalclearance aboveis required.
8. The PuraGuard QC™oil coalescing filter must be
installed after a properly functioning air dryer. Failure
to locate the filter after an air dryer can cause the filter
tomalfunction. Anairdryereliminates certainconditions
inthe discharge line that couldcompromise the design
ofthe filter.
9. Do not mount the unit in the engine compartment.
MOUNTING THE PURAGUARD QC™OIL
COALESCING FILTER
1. Afterpositioningthe PuraGuardQC™oilcoalescingfilter
according to the installation requirements, mark the
position of the mounting holes on the frame rail. Note:
Check the vehicle manual before drilling a frame
member.
2. Use vehicle manufacturer guidelines for mounting
hardware (use at least grade 5 hardware). Torque to
160-200in-lbs.
CONNECTING THE AIR HOSES
1. ThePuraGuardQC™ filtersupplyand deliveryports are
1/2-14 NPT. Install minimum 1/2 inch inside diameter
air hoses. Install fittings prior to mounting the filter.
2. Hoses must be installed without tight turns that might
cause air flow restrictions. Note: Check that the hose
attachment agrees with the air flow arrow symbol (see
Figure1).
OPERATIONAL TEST
Buildtheair systemtogovernor cutout. Shutoff theengine.
Using a soap solution, check all hoses and fittings leading
to and from the filter for leakage and integrity. Repair any
excessive leaks - exceeding a 1 inch bubble in 5 seconds
-before restoringvehicle to service.
MAINTENANCE KIT INSTALLATION
KIT DESCRIPTION
Akit is available for cartridge replacement.
VEHICLE PREPARATION
1. Parkthevehicleonalevelsurfaceandpreventmovement
by means other than the brakes.
2. Drain all reservoirs to 0 p.s.i.
3. Drainthe contentsof the sumpinto a suitable container
fordisposal and then close the drain valve.
DISASSEMBLY AND CLEANING
1. Using a strap wrench, unscrew the cartridge.
2. Removeand discard thecartridge.
INSPECTION
1. Inspect the PuraGuard QC™oil coalescing filter for
broken or missing parts. Replace as necessary.
2. Inspectthedrain valvefor any build-upthat couldimpair
its function. Clean as necessary.
3. Inspect the housing during filter replacement. Replace
the PuraGuard QC™ oil coalescing filter if the body is
becomingclogged with carbon or dirt,clean the supply
anddelivery ports if necessary.
ASSEMBLY
1. Tightenthereplacementcartridgebyturningthecartridge
180°afterthecartridge seal touchesthealuminumbody.
Tighten with a strap wrench, do not tighten by turning
thedrainvalve.
OPERATIONAL TEST
Buildtheair systemtogovernor cutout. Shutoff theengine.
Using a soap solution, check all hoses and fittings leading
to and from the PuraGuard QC™filter for leakage and
integrity. Repair any excessive leaks - exceeding a 1 inch
bubblein 5 seconds - before restoring vehicle to service.

5
FIGURE5 -MAINTENANCE KITS
Mounting Bracket Kit Piece No. 5013671
Thiskitcontains themounting hardwareneeded
for installing the PuraGuard QC™oilcoalescing
filter.
INCLUDED
IN KIT
Cartridge Kit Piece No. 5013672
This kit contains the PuraGuard QC™oil
coalescingfilter spin-on cartridge only.
SPIN-ON
CARTRIDGE

6BW2396 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 1/2004 Printed in U.S.A.
PURAGUARD QC™OIL COALESCING FILTER TROUBLESHOOTING CHART
SYMPTOMS
1. More oftenthan normal
(monthly)sump draining
required.
CAUSE REMEDY
A. PuraGuardQC™ oil
coalescingfilter installed
in incorrect position in
system.
B. Alcohol injector in
system.
C. Air dryer malfunction.
D. Compressormalfunction.
2. Bypassfeature not
working. A. Supplyand deliveryair
connectionsreversed. A. Reverse hoseconnections.
A. Seefigure 3.
B. ThePuraGuard QC™ filteris not recommended
to be used in conjunction with an alcohol
evaporatoror injector. [The PuraGuard QC™
filterwill remove the liquid or aerosol alcohol
introduced,defeat thepurpose of theevaporator/
injectorand require the sump to be drained more
oftenthan usual.]
C. Check the air dryer.
D. Check the compressor.
3. Oil in the system. A. Supplyand deliveryair
connectionsreversed.
B. Sumpnot drained
regularly.
C. Cartridge maintenance
intervalexceeded.
D. Air dryer malfunction.
E. Compressormalfunction.
A. Reversehose connections.
B. Drainthe sump every 300 operating hours, 8,000
miles or one (1) month. (Draining can be done
morefrequently if desired.)
C. Use a maintenance kit to replace the cartridge
every3600 operating hours,100,000 miles or
one(1) year whichever is less.
D. Check the air dryer.
E. CheckCompressor.