BENDIX TCH-008-042 User's Manual
Contents
1. PRIMARY SECONDARY Refer to air dryer application guideline BW 110 A for additional details and details for bulk unloading applications Compressor duty cycle must not exceed the manufacturers criteria For Bendix compressors the duty cycle must not exceed 25 For details refer to Bendix compressor application guidelines For additional information contact the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 or visit www bendix com BW2634 2007 Bendix Commercial Vehicle Systems LLC All rights reserved 5 2007 Printed in U S A2. Manual See attachment 2007 Bendix Commercial Vehicle Systems LLC All rights reserved 5 2007 Printed in U S A SUPPLY S RE aJ SUP D Bendix AD IP AD 9 Air Dryer SUPPLY m b DEL High Air Usage Drying Options Be PRIMARY SECONDARY MUST BE ADDED AD IP AD 9 EverFlow COMPRESSOR res SECONDARY Module Assembly nub Bendix EverFlow Continuous Flow Dryer Modules PRIMARY SINGLE CHECK VALVE AD IS EverFlow Piece No Model Voltage Module Assembly 801801 AD IP 801288 AD IP 801032 AD 9 801788 AD 9 PRIMARY SECONDARY a7 a T s CON SUP DEL 12Vdc ais Piece No Voltage 12Vdc 802121 12Vdc 24Vdc 802698 24Vdc Bendix AD IS Air Dryer Modules DRYER 2 Ref 5011322 12Vdc DRYER 1 FROM DEL OF DRYER 2
3. Bendi Technical Bulletin Bulletin No TCH 008 042 Effective Date 5 3 2007 Cancels N A Page 1 of 2 subject Alcohol in the Air Brake System Bendix Commercial Vehicle Systems LLC discourages the use of alcohol in the air brake system as a means of preventing system freeze up in cold temperatures Studies indicate that using alcohol and alcohol based products sold for this purpose removes the lubrication from the components of the air braking system In addition the materials used for the internal seals of the air system components may be adversely impacted by the residue that some anti freeze additives leave behind Both are detrimental to air system Component life expectancy causing premature wear Because of this Bendix air system components warranty will be void if analysis shows that alcohol was added to the air brake system As stated in Bendix Application Specification BW 110 A alcohol is not an acceptable substitute for having adequate air drying capacity If the air dryer is maintained in accordance with the manufacturer s recommended practices and moisture is found to be present in the system reservoirs more drying capacity is required Bendix has several viable options including extended purge air dryers extended purge tandem dryers in parallel with common control and air dryers arranged to provide continuous flow as with the Bendix EverFlow continuous flow air dryer module See page 2 for system schematics To add
4. ress concerns with contaminants in trailer air brake systems the Bendix Cyclone DuraDrain water separator and the Bendix System Guard trailer air dryer are available Refer to Bendix service data sheet SD 08 2402 and SD 08 2416 respectively for details Bendix has also found some alcohol evaporators which may be placed in series with a single air dryer can be restrictive to the output of the compressor This restriction can cause excessive compressor discharge pressures at the head of the compressor This is especially true when the air induction to the compressor is pressurized turbocharged High head pressures can shorten the life of the internal components of the compressor and cause higher head temperatures which may lead to carbonization of the compressor discharge and discharge line In order to protect the compressor from these high head pressures an ST 4 safety valve is installed in most Bendix compressors If a high head pressure event occurs the safety valve will open thereby relieving the compressor and discharge line of these high air pressures As always follow all recommended safety procedures when performing any service on your vehicle Caution never apply an open flame to frozen air lines and valves instead move the vehicle to a warm building Additionally before removing contaminants refer to RP617A procedure for contaminant removal in the Technology amp Maintenance Council TMC Recommended Maintenance Practices
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