Bendix Commercial Vehicle Systems AD-IP INTEGRAL PURGE AIR DRYER 5/07 - Manual (Page 12)

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10. Install the desiccant cartridge (11) on the end cover (6)
making certain the cartridge is properly seated and flush
on the end cover.
Note: It may be necessary to rotate the cartridge slightly
until the anti-rotation lugs are properly aligned and allow
the cartridge to rest flush against the end cover.
11. Using an adjustable wrench or a socket, tighten the
desiccant cartridge bolt (10), to secure the desiccant
cartridge (11) to the end cover (6). Torque the desiccant
cartridge bolt to 65-75 ft. lbs. (40ft. lbs. minimum).
Caution: Do not over torque.
AD-IP ™ AIR DRYER INSTALLATION
1. Using the relationship marks made during step 7 of the
“AD-IP ™ AIR DRYER REMOVAL”, install the lower
mounting bracket (9) on the end cover (6) and secure it
using the two 3/8” cap screws and washers (7 & 8).
Torque the cap screws to 300-360 in.lbs.
2. Using the relationship marks made during step 6 of the
AD-IP ™ Air Dryer Removal Procedure, install the saddle
bracket (5) and mounting strap (4) on the end cover (6),
and using the 5/16" cap screw (1) and sleeve nut (3)
secure the strap to the saddle bracket. Tighten the
5/16" nut on the upper mounting bracket. Torque to 60-
100 in. lbs.
3. Install the AD-IP ™ air dryer on the vehicle using the four
bolts that secure both the upper and lower mounting
brackets.
4. Reconnect the three airlines to the proper ports on the
end cover (identified during step 3 of the AD-IP ™ Air Dryer
Removal).
5. Reconnect the vehicle wiring harness to the AD-IP ™ air
dryer heater and thermostat assembly connector by
plugging it into the air dryer connector until its lock tab
snaps in place.
6. Before placing vehicle back into service, perform the
Operation and Leakage Tests stated elsewhere in this
manual.
RETROFITTING THE AD-IP ™ AIR DRYER
GENERAL
The following retrofit instructions are presented for reference
purposes only since Bendix aftermarket retrofit and
replacement air dryers are packaged with the most up-to-
date installation instructions. The instructions packaged with
the AD-IP
™ air dryer should be followed in lieu of those
presented here.
The preceding portion of this manual deals with “in-service”
repair and/or replacement of the AD-IP
™ air dryer. The portion
of the manual that follows is concerned with installing an
AD-IP
™ air dryer on a vehicle not previously equipped with
one.
VEHICLE APPLICATION REQUIREMENTS
The basic application requirements presented here apply to
a standard air dryer installation. The majority of highway
vehicles in use today will meet these basic requirements
however, some may not. Examples of vehicles that may not
meet the requirements include, refuse trucks, city coaches,
bulk trailer unloading operations and other high air
consumption systems. While the AD-IP
™ air dryer can be
used on these vehicles the standard installation procedure
presented in this manual may require modification to assure
proper operation and service life. Consult your local
authorized Bendix parts outlet or sales representative for
additional information.
Charge Cycle Time — The AD-IP ™ air dryer is designed to
provide clean, dry air for the brake system. When a vehicle’s
air system is used to operate non-brake air accessories it
is necessary to determine that, during normal daily operation
the compressor should recover from governor “cut-in” to
governor “cut-out” (usually 100 psi to 120 psi) in 90 seconds
or less at engine RPMs normal to the vehicle vocation. If the
recovery time consistently exceeds this limit, it may be
necessary to “bypass” the air accessory responsible for the
high air usage. Consult your local authorized Bendix parts
outlet or sales representative for additional information.
Purge Cycle Time — During normal vehicle operation, the
air compressor must remain unloaded for a minimum of 30
seconds. This minimum purge time is required to ensure
complete regeneration of the desiccant material. If the purge
time is occasionally shorter than the times specified, no
permanent ill effect should be expected, however, if the purge
time is consistently less than the minimum, an accessory
bypass system must be installed. Contact the nearest
authorized Bendix parts outlet or Bendix representative for
additional information. Note: Reservoir Volume - Total vehicle
reservoir volume can impact the Charge and Purge Cycle
time. The chart below can be used as a guide in determining
if additional help is required.
Total Vehicle Reservoir
Volume
Requirement
Less than 9,000 cu. in. .................. Standard AD-IP ™ Air Dryer
9,000 - 12,500 cu. in. ........................... Extended Purge AD-IP ™ Air
Dryer
Greater than 12,500 cu. in. ............ Contact Bendix Rep. or
Bendix Engineering
Air Compressor Size — Although the AD-IP ™ air dryer can
be used in conjunction with larger compressors, it was
designed primarily for units rated for up to 30 CFM. It is
recommended that when using the AD-IP
™ air dryer with a
compressor which has a rated displacement exceeding 30