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®
Bendix
®
AD-IS
®
Air Dryer and Reservoir System
RES
GOVERNOR
RESERVOIR (2)
21
PRI
DELIVERY TO
MOUNTING
DESICCANT
PRIMARY
HOLES - 4
CARTRIDGE
RESERVOIR
PURGE VALVE
PRESSURE
PROTECTION
22
VALVES (4)
SEC
DELIVERY TO
SAFETY VALVE
SECONDARY
RESERVOIR
PURGE
MOUNTING
RESERVOIR
23
BOLTS (3)
AUX2
UNL
AUXILIARY
GOVERNOR
DELIVERY PORTS
UNLOADER (2)
(2)
HEATER /
GOVERNOR
24
THERMOSTAT
AUX1
1
EXH
AUXILIARY
IN
GOVERNOR
®
AD-IS
AIR DRYER
PRESSURE PROTECTION
DELIVERY PORTS
SUPPLY FROM
EXHAUST
(4)
PART NUMBER
VALVES (4)
COMPRESSOR
STAMPED HERE
®
FIGURE 1 - AD-IS
AIR DRYER AND RESERVOIR SYSTEM
Air
Connection
Function/Connection
QTY
DESCRIPTION
Port ID
The function of the Integrated Solution Air Dryer (AD-IS
®
)
1
and Reservoir System is to provide heavy vehicles with an
Inlet Port (air in).
1
IN
integrated vehicle air dryer, purge reservoir, governor and a
21
number of the charging valve components in a module.
Delivery Port out (to Primary reservoir)
1
PRI
These have been designed as an integrated air supply
22
system.
SEC
Delivery Port out (to Secondary reservoir)
1
The AD-IS
®
air dryer and reservoir system collects and
24
removes air system contaminants in solid, liquid and vapor
Auxiliary Delivery Port (air out).
4
AUX 1
form before they enter the brake system. It provides clean,
23
dry air to the components of the brake system which
Auxiliary Delivery Port (air out).
1
AUX 2
increases the life of the system and reduces maintenance
UNL
Unloader Control Air (D-2A
Governor)
2
costs. The necessity for daily manual draining of the
RES
Common Reservoir Pressure
reservoirs is eliminated.
(D-2A
Governor)
2
EXH
Governor Exhaust
1
TABLE 1 - PORT DESIGNATIONS
1

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   Summary of Contents for BENDIX AD-IS AIR DRYER

  • Page 1

    ® Bendix ® AD-IS ® Air Dryer and Reservoir System GOVERNOR RESERVOIR (2) DELIVERY TO MOUNTING DESICCANT PRIMARY HOLES - 4 CARTRIDGE RESERVOIR PURGE VALVE PRESSURE PROTECTION VALVES (4) DELIVERY TO SAFETY VALVE SECONDARY RESERVOIR PURGE MOUNTING RESERVOIR BOLTS (3)

  • Page 2

    Note 1: ® The AD-IS air dryer and reservoir system DESICCANT purge piston has a purge control channel drain. This allows any condensation in this area to flow past a diaphragm in the top of the purge piston and out through a channel in the middle of the central bolt of the purge SEPARATOR assembly to be drained.

  • Page 3

    DESICCANT SEPARATOR DELIVERY CHECK PURGE VALVE ORIFICE (CLOSED) GOVERNOR PURGE RESERVOIR UNLOADER PORT PRESSURE PROTECTION VALVES PURGE INLET CONTROL PORT CHANNEL (IN) TURBO CUT- OFF VALVE EXHAUST (CLOSED) PURGE VALVE SAFETY (OPEN) VALVE PRIMARY AUXILIARY PORTS PORT (TO ACCESSORIES) (PRI) PURGE RESERVOIR DRAIN VALVE...

  • Page 4

    Purge valve maintenance is permissible purge valve to open to the atmosphere and the turbo cut-off during the warranty period only when using a genuine Bendix valve to close off the supply of air from the compressor (this purge valve kit.

  • Page 5

    HEATER AND THERMOSTAT CONNECTOR C. Location of the air dryer and reservoir system is too OPERATION & LEAKAGE TESTS (ALSO SEE close to the air compressor. Refer to Bendix VIDEO BW2327) Specification BW-100-A, Appendix B for discharge 1. Check all lines and fittings leading to and from the air line lengths.

  • Page 6

    A. Electric Power to the Dryer ® REBUILDING THE AD-IS AIR DRYER AND With the ignition or engine kill switch in the RUN RESERVOIR SYSTEM position, check for voltage to the heater and GENERAL SAFETY GUIDELINES thermostat assembly using a voltmeter or testlight. Unplug the electrical connector at the air dryer and WARNING! PLEASE READ AND FOLLOW reservoir system and place the test leads on each of...

  • Page 7

    GENERAL 6. Never exceed manufacturer’s recommended When rebuilding or replacing components of the air dryer pressures. and reservoir system use only genuine Bendix parts. For 7. Never connect or disconnect a hose or line ease in servicing, the AD-IS ®...

  • Page 8

    5004052: This kit contains the parts necessary to replace system will not cycle excessively. the delivery check valve. See Bendix publication BW5057 "Air Brake Handbook." • Purge Valve Maintenance Kit - Part Number 5018313: This kit contains the parts necessary to BRAKING SYSTEM PROTECTION replace and relubricate the purge valve sealing rings.

  • Page 9

    GOVERNOR GASKET (SPECIAL GASKET, SEE NOTE 6) GOVERNOR (NON-ADJUSTABLE, 130 PSI CUT-OUT) SMALL O-RING BOLTS CHECK VALVE BODY SPRING LARGE O-RING ADAPTER FIGURE 7 - AD-IS ® AIR DRYER AND RESERVOIR SYSTEM DELIVERY CHECK VALVE cut-out pressure (a 1” bubble in 10 seconds is acceptable), See Figure 7 throughout this procedure.

  • Page 10

    5. Grease the adapter and the remaining larger o-ring and install it onto the fitting. 6. Position the Bendix supplied gasket, then insert the governor mounting bolts through the governor and tighten (to 125 in-lbs). (Note: Do not replace with a standard compressor/governor gasket.)

  • Page 11

    ® AD-IS AIR DRYER AND RESERVOIR SYSTEM TROUBLESHOOTING CHART REMEDY SYMPTOM CAUSE 1. Dryer is constantly A. Excessive system A. Test for excessive system leakage. “cycling” or purging. leakage. Allowable leakage observed at dash gauge: Single vehicle - 1 psi/minute. Tractor trailer - 3 psi/minute.

  • Page 12

    (outside air not passing through air dryer). C. Excessive air usage - C. Refer to Bendix Advanced Troubleshooting Guide Air dryer not compatible for Air Brake Compressors (BW1971) for proper with vehicle air system application of the AD-IS ®...

  • Page 13

    TROUBLESHOOTING CHART (Continued) REMEDY SYMPTOM CAUSE ® 3. Safety valve on air dryer A. Defective AD-IS air dryer A. Test to determine if air is passing through check “popping off” or and reservoir system valve. Repair or replace. Refer to Symptom 1, delivery check valve.

  • Page 14

    C. Compressor passing C. Check for proper compressor installation; if symptoms persist, replace compressor. Refer to excessive oil. Bendix Advanced Troubleshooting Guide for Air Brake Compressor (BW1971). A. A slight “pinging” sound may be heard during A. Single cylinder 9. “Pinging” noise...

  • Page 15

    TROUBLESHOOTING CHART (Continued) REMEDY SYMPTOM CAUSE A. Compressor fails to A. Check air hose from governor to compressor for a 10. The air dryer purge “unload”. missing, kinked or restricted line. Install or repair piston cycles rapidly in air hose. the compressor unloaded (non- Repair or replace compressor unloader.

  • Page 16

    BW2234 © 2007 Bendix Commercial Vehicle Systems LLC All rights reserved. 5/2007 Printed in U.S.A.

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