Bendix-commercial-vehicle-systems AD-SP SYSTEM PURGE AIR DRYER 10/04 Uživatelský manuál

1®SD-08-2415Bendix® AD-SP™ System Purge Air Dryer & SC-PR™Single Check Protection Valve“SPIN OFF”DESICCANTCARTRIDGEEXHAUST PORTMOUNTINGHOLES (3)AD

10Caution: While performing service on the AD-SP™ air dryer, itis not recommended that a clamping device (vise,C-clamp, etc.) be used to hold any die

113. Install the o-ring on the purge piston, then install thepiston in the body taking care not to cut the pistono-ring.4. Install the non-metallic ex

12with governors which have a 120 to 130 psi nominal cut-out pressure. If a governor is used that is not within thislimitation contact your Bendix par

13FIGURE 9 - AD-SP™ SYSTEM PURGE AIR DRYERMOUNTING BRACKET DIMENSIONS3. Do not locate the AD-SP™ air dryer near heat producingcomponents such as the v

14FIGURE 13 - SC-PR™ SINGLE CHECK PROTECTION VALVE INSTALLED IN MULTI-COMPARTMENT RESERVOIRFRONT AXLE COMPARTMENTREAR AXLE RESERVOIRSC-PR™VALVESUPPLY

15B. If the AD-SP™ air dryer is replacing an integral purge airdryer such as the Bendix® AD-4™ or AD-9™ air dryer, ona vehicle equipped with a Cummins

16AD-SP™ AIR DRYER TROUBLESHOOTING CHARTSYMPTOMS1. Dryer is constantly“cycling” or purging.Dryer purges frequently(every 4 minutes or lesswhile vehicl

171. Test fittings, hoses, lines and connections. Applysoap solution to detect excessive leakage.Tighten or replace as needed then repeat the airdryer

18AD-SP™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDYB. Locate the SC-PR™ valve on the front axleservice (secondary) reservoir and

19AD-SP™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDYNOTE: Duty Cycle is theratio of time the compressorspends building air to tota

2After exiting the end cover, the air flows into the desiccantcartridge where an oil separator, located between the outerand inner shells of the cartr

20AD-SP™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDYInsufficient coolant flow through compressor. Inspectcoolant line. Replace as

21AD-SP™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDYA. Repair or replace air dryer purge valve.B. One or both dash air gauges shou

228. Air dryer does not purgeor exhaust air. Note:this symptom oftenprecedes Symptom #9if desiccant cartridge isnot replaced.A. Air not reaching AD-SP

23AD-SP™ AIR DRYER TROUBLESHOOTING CHART (Continued)SYMPTOMS CAUSEREMEDY9. Desiccant materialbeing expelled from airdryer purge valveexhaust (may look

24Bendix® BA-922™, or DuraFlo™ 596 aircompressorCompressor with up to 25% duty cycleFootnotes:1 With increased air demand the air dryer cartridge need

25HOLSET TYPE"E & QE"COMPRESSORW/O ECONVALVEDASHGAUGELOW PRESSUREINDICATORAdditional Troubleshooting InformationThe troubleshooting proc

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28BW1777 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 10/2004 Printed in U.S.A.

3FIGURE 4 - AD-SP™ AIR DRYER RELIEF VALVE OPERATIONDESICCANTOILSEPARATORDELIVERYCHECKDELIVERYPORTTURBOCUTOFFCONTROLPORTGOVERNORCOMPRESSORPURGE /RELIEF

4DESICCANTOILSEPARATORDELIVERYCHECKDELIVERYPORTCONTROLPORTCOMPRESSORPURGE /RELIEFVALVEFRONTRESERVOIRSC-PR™VALVEREARRESERVOIRENGINETURBOPURGEORIFICEEXH

5air to flow through the purge mechanism. Dry air for thebrake system enters the purge control mechanism throughan air channel located in the delivery

6When supply pressure reaches 100 psi, the diaphragm movesaway from its seat and air entering the supply port flows throughthe pressure protection val

7D. A single check valve, or a device with a check valvefeature, may have been installed to the inlet port ofthe supply tank or in the delivery line b

8A. If the pressure drop in the front axle reservoir ex-ceeds 8-14 psi, check the air brake system forexcessive leakage and repair and re-test. If the

9REPAIRING THE AD-SP™ AIR DRYER GENERALIf, after completing the routine operation and leakage tests,it has been determined that one or more component