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.)
