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AIR DRYER APPLICATION GUIDELINE
The following Application Guideline is a point system that is calculated based on Vehicle Configuration
and Vocation Options. Fill in points accordingly — on each line — and refer to Page 2 for dryer selections.
If a particular entry is not valid for an application, then enter ZERO (0) on that line. Refer to Page 3 for
example applications.
Vehicle configuration Points
1. Vehicle is equipped with bulk offloading or central tire inflation. See Note 1
2. For every axle (tractor and trailer – including lifts): Add 1.0 point
3. For each non-steerable lift axle (additional points): Add 1.0 point
4. For each steerable lift axle (additional points): Add 0.5 point
5. Tractor and/or trailer is equipped with air suspension. Add 0.5 point
Vocation oPtions (choose the one that best fits)
6. Vehicle is used as a city transit bus. See Note 2
7. Vehicle is used for pickup & delivery.
a) Non-fuel hauler: Add 0.5 point
{
b) Fuel hauler: Add 1.0 point
8. Vehicle is used for residential refuse. Add 4.5 points
9. Vehicle is used for rural or commercial refuse. Add 1.0 point
10. Vehicle is used as a dump truck or concrete mixer. Add 1.0 point
11. Vehicle is used for logging or construction. Add 1.0 point
12. Vehicle is used for line haul.
a) Single trailer No Points:
b) Pulling three (3) to five (5) axles
on any trailer/dolly combination:
Subtract 1.5 points:
c) Pulling six (6) or more axles on
any tailer/dolly combination:
Subtract 2.5 points:
Add lines 1-12
and use this value
on Page 2
1
Vehicles equipped with either bulk offloading or central tire inflation are required to use two air dryers with a Bendix® EverFlow® controller
assembly. No points need to be calculated. Refer to Page 2 for proper dryer selection.
2
Requires an Extended Purge version of the dryer (AD-9® EP, AD-9si™ EP, AD-IP® EP, AD-IS® EP). No points need to be
calculated. Refer to Page 2 for proper dryer selection.
CONTROLLED ELECTRONIC MEDIA DOCUMENT: Verification of revision level or adequacy is required prior to use.
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Page 2
AIR DRYER APPLICATION GUIDELINE
Application
Highway Travel Coach / RV N/R
City Transit Bus N/R
Air/Hydraulic N/R
School Bus City / Rural Route N/R
Fire Truck
Pick-up & Delivery
Fuel Hauler (Non-Bulk
Ofoading)
Line Haul
Rural and Commercial Refuse /
Yard and Terminal Jockey
Residential Refuse (with and
without Work Brake)
Dump Truck / Concrete Mixer
Off-Highway / Construction /
Loggers
Increasing Performance
AD-IP®,
AD-9®,
AD-9si
Point
Total AD-SP
3
ü
3
ü
2-6
6.5-9
2-6
3
ü
6.5-9
9.5-13
2-6
3
ü
6.5-9
2-4
6.5-9
2-6
6.5-9
2-6
6.5-9
9.5-13
®
®
AD-IS
AD-RP
ü
ü
ü
ü
ü
ü
ü ü
ü
ü
AD-9® E P,
AD-9si™ E P,
™
AD-IP® E P,
AD-IS® EP
™
AD-RP™ EP
ü
ü
ü
ü
ü
ü
ü
Bendix® Air Dryers
Tandem
Installed
7
4
Dryers
ü ü
ü ü
Bulk Ofoading N/R
Central Tire Ination N/R
Reservoir Drainage Frequency Check Monthly Monthly / 4000 Miles
®
Bendix
EverFlow®
Assembly
ü
ü
5
Bendix® AD-9®/ AD-9si™/
AD-IP® / AD-IS® / AD-RP
Air Dryers
6
™
Point Totals
Standard Purge
Extended Purge
Tandem Installed Dryers
Bendix® EverFlow® Assembly
Points 2 3 4 5 6 6.5 7 8 9 9.5 10 11 12 13 14 15 16 or above
The application chart is for reference only. If your vehicle does not fall into these guidelines, contact Bendix Engineering or TechTeam at
1-800-AIR-BRAKE.
N/R – No Points Required – Application is not dependent on point totals.
3
When selecting a Bendix® AD-SP® air dryer, note this dryer is intended for servicing low-demand air systems. For example, Line Haul applications
are limited to single tandem axle trailers.
4
Tandem dryers must be matched models (i.e. two Bendix® AD-IS® or two Bendix® AD-9® air dryers, etc.). Both dryers must be extended purge
versions.
5
There is no required compressor charge time or purge time. The operation is controlled through the Bendix® EverFlow® air dryer module.
6
The Bendix® AD-9si™ air dryer is not available in tandem or EverFlow configurations.
7
Consult Bendix Tech Team at 1-800-AIR-BRAKE (1-800-247-2725).
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AIR DRYER APPLICATION GUIDELINE
USAGE EXAMPLES
Example #1: Typical Line Haul Application
Vehicle Configuration
1. Not Applicable
2. Total number of all axles = 3 points
3. Total number of non-steerable lift axles = 0 points
4. Total number of steerable lift axles = 0 points
5. Tractor is equipped with air suspension = 0.5 points
Vocation Options
6, 7, 8, 9, 10, 11 Not Applicable = 0 points
12. Standard line-haul hauling single trailer = 0 points
Total [ 3 + 0.5 = 3.5 points ]
Selection choices include: Bendix® AD-SP®, AD-9®, AD-9si™, AD-IP®, AD-IS® or AD-RP™ air dryers.
Example #2: Line Haul Pulling Single Axle Double
Vehicle Configuration
1. Not Applicable
2. Total number of all axles = 5 points
3. Total number of non-steerable lift axles = 0 points
4. Total number of steerable lift axles = 0 points
5. Tractor equipped with air suspension = 0.5 points
Vocation Options
6, 7, 8, 9, 10, 11 Not Applicable = 0 points
12. Vehicle is used for line haul (3-5 axles) = –1.5 points
Total [ 5 + 0.5 – 1.5 = 4 points ]
Selection choices include Bendix AD-9, AD-9si, AD-IP, AD-IS or AD-RP air dryers.
NOTE: A Bendix AD-SP air dryer is not acceptable in this application.
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Page 4
Recommended Service Intervals for Bendix® Air Dryers
8
8
Reservoir Drain Interval
Air
Usage
Standard
Medium
High
8
Drain reservoirs and change the desiccant cartridge more frequently if more than just traces of moisture are found in any of the reservoirs.
Typical Vehicle
Vocation Axles
Line haul,
city delivery
Double trailer
trains, light transit,
light off-highway
Multiple trailer
trains, city transit,
heavy duty off-road
5 or less 900 25,000 3 months Every 3 years Every 3 years
8 or less 450 12,000 2 months Every 2 years Every 2 years
11 or less 300 6,000 1 month Every year Every year
(whichever comes rst)
Hours Mileage Time AD-9
The Bendix® PuraGuard® oil coalescing air dryer cartridge
has an identical appearance to the standard air dryer
cartridge, but contains oil coalescing media at the inlet of
the desiccant bed. This coalescing media provides a much
higher level of oil removal compared to the standard air
dryer cartridge. The PuraGuard oil coalescing cartridge
has all of the same functions as the standard cartridge and
is used in applications where lower oil concentration levels
are required.
IMPORTANT! When servicing, note that standard air dryer
cartridges may be serviced with PuraGuard oil coalescing
cartridges, however, PuraGuard oil coalescing air dryers or
cartridges MUST only be serviced with like replacements.
Standard
Desiccant
Cartridge
Replacement
For Bendix PuraGuard oil coalescing air dryer only:
Preventive Maintenance is as easy as 1-2-3
Adhering to a preventive maintenance schedule is crucial to
keeping a vehicle’s air system clean and ensuring superior
performance of all components that utilize system air— such
as brakes, emissions equipment and automated manual
transmissions. Depending on vocation, Bendix recommends
a 1-, 2- or 3-year air dryer cartridge replacement on vehicles
equipped with a Bendix® compressor.
For severe service application — such as residential refuse
trucks or school buses — the air dryer cartridge should
be replaced every year or 100,000 miles; for pick-up
and delivery operations, or for double- and triple-trailer
PuraGuard® Oil Coalescing
Desiccant Cartridge Replacement for
Bendix® Air Dryers
®
AD-9si™AD-IP®AD-IS®AD-RP
line haul trucks, every two years or 200,000 miles is the
recommendation. Line-haul operations using a single trailer
should swap the lter out every three (3) years or 300,000
miles. The recommended intervals for trucks equipped with
non-Bendix® compressors are 6 months (50,000 miles),
one year (100,000 miles) and two years (200,000 miles),
respectively.
™
More frequent intervals may be required depending
on a vehicle’s age, its compressor condition, use of a
non-Bendix compressor, the operating environment, the
vehicle’s vocation, and its usage. In conjunction with these
guidelines, eets can determine the functionality of their
lters by checking for moisture in the air brake system
monthly. If moisture is present, the air dryer cartridge may
require replacement. Reference the Bendix Service Data
Sheet of the specic air dryer for additional information.
(Recommended intervals for trucks equipped with nonBendix compressors are 6 months (50,000 miles), one
year (100,000 miles) and two years (200,000 miles),
respectively.)
Bendix Commercial Vehicle Systems LLC • 901 Cleveland Street • Elyria, Ohio 44035 • 1-800-AIR-BRAKE (1-800-247-2725) • www.bendix.com
BW2600 ©2014 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 03/14 • All Rights Reserved
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