BENDIX AD-4 AIR DRYER Manual de servicio

1®SD-08-2407Bendix® AD-4™ Air DryerEXTENDED PURGE AD-4™ AIR DRYER STANDARD AD-4™ AIR DRYERLOWERBRACKETDESCRIPTIONThe function of the AD-4™ air dryer i

103/8" bolts require replacement, insure that thereplacement bolts are grade 5 minimum and the samelength as the original bolts. Use of inf

11Bendix parts outlet or sales representative for additionalinformation.1. Charge Cycle Time - The AD-4™ air dryer is designed toprovide clean, dry a

12VEHICLE PREPARATION1. Park the vehicle on a level surface and prevent movementby means other than the brakes.2. Drain all reservoirs to 0 p.s.i. (0

133. For AD-4™ air dryer end covers with a dual terminal (SeeFigure 6) heater connections, the power and insulatedreturn wires may be connected to eit

14SYMPTOMS1. Dryer is constantly“cycling” or purging.Dryer purges frequently(every 4 minutes or lesswhile vehicle is idling).A. If leakage IS SHOWN on

151. Test fittings, hoses, lines and connections.Apply soap solution to detect excessiveleakage. Tighten or replace as needed thenrepeat the air dryer

16AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMSCAUSEREMEDY6. With gauge installed at RES port of governor,pressure should not drop below ”

17AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS 2. Water and/or Oil inSupply or ServiceReservoir (continued).CAUSEREMEDYE. Excessive air u

18AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS 2. Water and/or Oil inSupply or ServiceReservoir (continued).Discharge Line Freeze-Up The

19I. Desiccant requiresreplacement.AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMSCAUSEREMEDYH. If vehicle uses Holset compressor, inspectfe

2PURGE VOLUMEDESICCANTBEDCH ECKV ALVEOIL SEPAR ATORDESICCANTCARTRIDGEDELIVERYPORTHEATERCH ECKV ALVEPURGEV ALVEORIFICEEXHAUSTPORTSUPPLY RESERVOIRCON

20AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)D. Excessive bends indischarge line (watercollects and freezes).E. Refer to Symptom 4,causes E &

21AD-4™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDY8. Desiccant material beingexpelled from air dryerpurge valve exhaust(may look

22Bendix® BA-922™, or DuraFlo™ 596 aircompressorCompressor with up to 25% duty cycleFootnotes:1 With increased air demand the air dryer cartridge

23HOLSET TYPE"E & QE"COMPRESSORW/O ECONVALVEDASHGAUG ELOW PRESSUREINDICATORAdditional Troubleshooting InformationThe troubleshooting p

24BW1450 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 10/2004 Printed in U.S.A.www.Beamalarm.com

3FIGURE 3 - AD-4™ AIR DRYER PURGE CYCLECONTROLGOVERNORSUPPLY RESERVOIRPURGE VOLUMEDESICCANTBEDOIL SEPAR ATORDESICCANTCARTRIDGEDELIVERYPORTHEATERCH

4FIGURE 4 - AD-4™ AIR DRYER SECTIONAL VIEWDESICCANTBEDOIL SEPAR ATORDESICCANTCARTRIDGECH ECKV ALVEPURGEORIFICEEXHAUSTCOVERNUTCHECK VALVEA SSEMBLYEND

52. Check mounting bolts for tightness. Retorque to 270-385 inch pounds.3. Perform the Operation & Leakage Tests listed in thispublication.Every 1

6resistance should be 2.0 to 4.0 ohms for the 12 volt,60 watt end cover and 4.0 - 7.0 ohms for the 24 volt,120 watt end cover. These resistance values

7FIGURE 6 - AD-4™ AIR DRYER ASSEMBLYAIR DRYERHOUSINGTHERMOSTATA SSEMBLYSAFETYV ALVECHECK VALVEA SSEMBLYSCREWEXHAUST COVER1/2” CAP SCREWPURGE VAL VE(

83. Do not attempt to install, remove, disassemble orassemble a component until you have read andthoroughly understand the recommendedprocedur

9the end cover. Remove and discard the three sealingrings. One sealing ring is located in the groove on thesealing plate and the other two are in groo