BENDIX AD-9si Service Data - Page 10
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If – after completing the routine operation and leakage
tests – it has been determined that one or more components
of the air dryer requires replacement or maintenance, refer
to the Maintenance Kit listing shown in this manual or the
Bendix
Quick Reference Catalog for the appropriate kit(s).
®
The Quick Reference Catalog (BW1114) can be ordered
and viewed on line at bendix.com.
Note: Kits are not available for servicing components inside
the air dryer purge volume.
DO NOT ATTEMPT TO REMOVE THE CLAMP BAND
THAT RETAINS THE TWO HOUSINGS TOGETHER.
SERIOUS INJURY OR DEATH MAY OCCUR IF THESE
INSTRUCTIONS ARE NOT FOLLOWED COMPLETELY.
BENDIX
AD-9si
AIR DRYER REMOVAL
®
®
This air dryer removal process is presented in the event it
becomes necessary to replace the entire air dryer. Normal
service and parts replacement does not require removal
of the air dryer from the vehicle.
1. Park the vehicle on a level surface and prevent
movement by means other than the brakes.
2. Drain all reservoirs to 0 psi.
3. Identify and disconnect the three air lines from the air
dryer housing.
4. Unplug the vehicle wiring harness from the heater and
thermostat assembly connector.
5. Remove the three mounting bolts that secure the air
dryer to the vehicle.
BENDIX AD-9si AIR DRYER INSTALLATION
1. Install the Bendix
AD-9si
®
the three existing 1/2"-13 UNC bolts. Torque the bolts
to 720-912 in-lbs. If replacement bolts are necessary,
use grade 5 or above and ensure they are the same
length as those originally used to install the dryer. If
the original air dryer is being reinstalled make sure the
threads in the air dryer housing are in good condition.
2. Reconnect the three air lines to the proper ports on the
air dryer – identified during step 3 of the Bendix AD-9si
removal.
3. Reconnect the vehicle wiring harness to the AD-9si
air dryer heater and thermostat assembly connector
by plugging it into the air dryer connector until its lock
tab snaps in place.
4. Before placing the vehicle back into service, test the
air dryer operation as indicated in Testing The Bendix
AD-9si Air Dryer section that follows.
10
air dryer on the vehicle using
®
Bendix
AD-9si
Maintenance Kits
®
®
Kit Description
Delivery Check Valve Replacement Kit
Desiccant Cartridge Replacement Kit (Standard)
Desiccant Cartridge Replacement Kit - Bendix
PuraGuard
air dryer (can be used to replace the standard
®
cartridge)
Governor Kit
Heater & Thermostat Replacement (12 volt)
Heater & Thermostat Replacement (24 volt)
Safety Valve Replacement
Silencer Kit (not shown)
Wiring Harness & Splice Kit (not shown)
Extended Purge Kits (not shown)
93 in
Reservoir w/ 3/8"-16 U-bolts
3
93 in
Reservoir w/ 1/2"-13 U-bolts
3
288 in
Reservoir w/ 3/8"-16 U-bolts
3
Purge Valve Assembly
Type
Purge Valve Assembly for
climate conditions above
-40°C (-40°F)
Arctic Purge Valve Assembly
for climate conditions of
-40°C to -50°C
(-40°F to -58°F)
TESTING THE BENDIX AD-9si AIR DRYER
Before placing the vehicle into service, perform the
following tests:
1. Close all reservoir drain valves.
2. Build up system pressure to governor cut-out and note
that the Bendix AD-9si air dryer purges (with an audible
burst of air), followed immediately by approximately 40
seconds of air flowing out of the purge valve.
3. Apply and release the service brakes several times to
reduce system air pressure to governor cut-in. Note
that the system once again builds to full pressure and
is followed by a purge at the air dryer exhaust.
4. It is recommended that the total air system be tested
for leakage to ensure that the AD-9si air dryer will not
cycle excessively.
It is important to read and adhere to the following
instructions, to ensure the brake system operates
safely after bypassing the air dryer.
Piece No.
K092011
5008414
AD-9si
®
®
5008414PG
K092010
K021189
109871N
5012561N
5005309N
5008972
Service Kit
Configuration
Pc. No.
AD-9si Air Dryer
K022105
AD-9si Air Dryer
K031560
(Soft Seat Version)
AD-9si Air Dryer
K031562
(Discharge Line Unloader)
AD-9si Air Dryer
K031559
AD-9si Air Dryer
K031561
(Soft Seat Version)
AD-9si Air Dryer
K031563
(Discharge Line Unloader)
109578
109579
800155