Bendix Commercial Vehicle Systems AD-RP PuraGuard Oil Coalescing Remote Purge Air Dryers - Manual (Page 12)

12
VEHICLE PREPARATION
1. Park the vehicle on a level surface and prevent
movement by means other than the brakes.
2. Drain all reservoirs to 0 psi (0kPa).
LOCATING THE BENDIX ® AD-RP ™ AIR DRYER
ON VEHICLE
1. The Bendix ® AD-RP ™ air dryer must be mounted
vertically (purge exhaust port toward road surface)
outside the engine compartment in an area of air fl ow
while the vehicle is in motion. The AD-RP air dryer must
not be exposed to direct wheel splash (note: locating
behind an axle mud fl ap is acceptable).
2. Locate the AD-RP air dryer as close to the fi rst (supply)
reservoir as possible.
3. Do not locate the AD-RP air dryer near heat producing
components such as the vehicle exhaust, and make
certain adequate clearance from moving components
(e.g. drive shaft, suspension, pitman arm, etc.) is
provided.
4. Locate the Bendix AD-RP air dryer on the vehicle
so that a minimum of one (1) inch clearance above
the cartridge is available to allow cartridge servicing.
Additionally, provide access to the bracket bolts so the
unit may be removed when necessary.
5. When choosing the mounting location for the AD-RP
dryer, note the discharge line length requirements
stated under the heading Connecting the Air Lines,
elsewhere in this manual.
Note: Under normal operating conditions, the maximum
inlet air temperature for the AD-RP dryer is 160° F.
MOUNTING THE BENDIX AD-RP AIR DRYER
1. Install the AD-RP air dryer by referring to Figure 7
and drilling the triangular mounting hole pattern in a
mounting plate and then mounting the plate on the
vehicle, or by drilling the mounting hole pattern in the
area of the vehicle chosen for mounting. Note: Check
the vehicle manual before drilling a frame member.
2. Important: The length of the three mounting bolts used
to attach the AD-RP air dryer to the mounting plate is
very important. Refer to Figure 8. The threaded end of
the 1/2"-13 UNC bolt must be between 1/8" below, to
1/4" above, the surface of the AD-RP dryer mounting
bracket surface when fully installed and tightened to
50 lb-ft. Damage to the dryer body will result if the
bolt warning is ignored. Measure the thickness of
all materials that the three mounting bolts must pass
through. Small adjustments can be made using fl at
washers under the bolt heads. Do not use more than
three (3) fl at washers.
3. Mount the AD-RP air dryer on the vehicle using three
1/2" bolts (grade 5 min.) of the proper length and
washers. Torque to 50 lb-ft.
CONNECTING THE AIR LINES
Important General Instructions
These instructions apply to all installations of the AD-RP
dryer regardless of whether the unit is replacing an existing
air dryer, or is being installed on a vehicle that never had
one installed. If the vehicle is currently equipped with an
air dryer some additional considerations apply.
A. If the AD-RP air dryer is replacing an integral purge
air dryer — such as the Bendix ® AD-9 ® air dryer — on
a vehicle equipped with any compressor except the
Cummins-Holset type E & QE, all that is necessary
is that the air dryer be removed and the existing air
lines be correctly connected to the AD-RP dryer. An
additional purge volume (minimum 200 cubic inches)
must also be installed and connected to the AD-RP
Remote Purge Port. The extended Purge Volume Kit
5008972 can be used.
B. If the AD-RP air dryer is replacing an integral purge
air dryer — such as the Bendix ® AD-4 ™ or AD-9 air
dryer — on a vehicle equipped with a Cummins-Holset
type E or QE compressor, in addition to removing the
existing air dryer and correctly connecting the existing
air lines to the AD-RP dryer, it will be necessary to
remove and discard the Holset ECON and special
orifi ce check valve.
FIGURE 7 - BENDIX ® AD-RP ™ SYSTEM PURGE AIR DRYER
MOUNTING BRACKET DIMENSIONS
2.835 INCHES
CENTER TO
CENTER
4.134 INCHES
CENTER TO CENTER 1/2” - 13 UNC
THREAD
(3 PLACES)