BENDIX BW2083 User's Manual
Contents
1. SD 08 2416 Bendix Trailer System Guard Air Dryer 21 CONTROL OUTLET 22 SUPPLY OUTLET 3 8 16 UNC x 50 Deep Mounting Holes 4 11 CONTROL INLET 12 SUPPLY INLET ALL SUPPLY amp CONTROL PORTS 1 4 FIGURE 1 TRAILER SYSTEM GUARD AIR DRYER DESCRIPTION The Bendix Trailer System Guard air dryer removes moisture and contaminates from the trailer air system Itis not intended to take the place of a dryer normally located on the power unit It acts as a buffer to remove moisture during wet times and gives up water vapor during dry times It protects the trailer air brake system when for short periods of time the trailer is pulled by vehicles without an air dryer or during times when the trailer is disconnected from the tractor The Trailer System Guard air dryer consists of two desiccant air dryers mounted in a single housing one to protect the trailer service system and the other to protect the trailer supply system PREVENTIVE MAINTENANCE Every 300 operating hours 8 000 miles or one 1 month 1 Visually inspect for physical damage or wear to the Trailer System Guard air dryer This can include but is not limited to chaffed or broken air hoses and or broken or missing parts 2 Check mounting bolts for tightness If loose re torque per Mounting the Trailer System Guard Air Dryer Every 900 operating hours or 25 000 miles or every three 3 months Check f2. 9 Components with stripped threads or damaged parts should be replaced rather than repaired Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer 10 Prior to returning the vehicle to service make certain all components and systems are restored to their proper operating condition 11 For vehicles with Antilock Traction Control ATC the ATC function must be disabled ATC indicator lamp should be ON prior to performing any vehicle maintenance where one or more wheels on a drive axle are lifted off the ground and moving Note The Trailer System Guard air dryer is intended to remove moisture and other contaminants normally found in the air brake system Using alcohol anti freeze oil or other de icing substances in the brake system can damage the air dryer and will therefore void the Trailer System Guard air dryer warranty OPERATION amp LEAKAGE TESTS Build the air system to governor cutout Shut off the engine Using a soap solution check all lines and fittings leading to and from the Trailer System Guard air dryer for leakage and integrity Repair any excessive leaks exceeding a 1 bubble in 5 seconds before restoring vehicle to service OPERATION GENERAL The trailer dryer works as a buffer removing moisture during exposure to wet air trailer hooked to a tractor without an air dryer or trailer is parked for extended periods with
3. open glad hands and giving up water vapor when reconnected to a tractor equipped with an air dryer The Trailer System Guard air dryer depends on dry tractor air to remove water vapor from the desiccant collected during wet times TRAILER SYSTEM GUARD AIR DRYER REMOVAL This removal process is presented for the replacement of the Trailer System Guard air dryer 1 Identify and disconnect the four air hoses from the Trailer System Guard air dryer 2 Remove the locknuts washers and grommets that secure the Trailer System Guard air dryer and remove it from the vehicle REPLACING OR RETROFITTING THE TRAILER SYSTEM GUARD AIR DRYER GENERAL The following instructions are presented for reference purposes only since Bendix aftermarket replacement Trailer System Guard air dryers are packaged with the most up to date installation instructions The instructions packaged with the Trailer System Guard air dryers should be followed in lieu of those presented here MOUNTING THE TRAILER SYSTEM GUARD AIR DRYER 1 After positioning the Trailer System Guard air dryer according to the location requirements mark the position of the predrilled mounting holes on the selected location A template for the mounting pattern is included on page 4 Note Only three of the four mounting holes must be used for securing the air dryer to the frame rail Securing the air dryer at all four mounting holes can lead to damage and
4. e removed Where circumstances require that the engine be in operation EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving rotating leaking heated or electrically charged components 3 Do attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the proper tools and observe all precautions pertaining to use of those tools 4 Ifthe work is being performed on the vehicle s air brake system or any auxiliary pressurized air systems make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle If the vehicle is equipped with an AD IS air dryer system or a dryer reservoir module be sure to drain the purge reservoir 5 Following the vehicle manufacturer s recommended procedures deactivate the electrical system in a manner that safely removes all electrical power from the vehicle 6 Never exceed manufacturer s recommended pressures 7 Never connect or disconnect a hose or line containing pressure it may whip Never remove a component or plug unless you are certain all system pressure has been depleted 8 Use only genuine Bendix replacement parts components and kits Replacement hardware tubing hose fittings etc must be of equivalent size type and strength as original equipment and be designed specifically for such applications and systems
5. eventual failure of the air dryer Any three of the four mounting holes can be used for installation Selection is at the discretion of the installer If mounting the dryer on a trailer cross member center the template to maximize clearance and facilitate installation Note Check the vehicle manual before drilling the selected location CONTROL IN SUPPLY IN CONTROL IN Gl SUPPLY IN CONTROL IN SUPPLY IN CONTROL SUPPLY IN FIGURE 2 TRAILER SYSTEM GUARD AIR DRYER OPERATION VIEWED FROM MOUNTING HOLE SIDE SUPPLY LINE CHARGING P SUPPLY LINE PARKING CONTROLLINE BRAKE APPLICATION CONTROL LINE BRAKE RELEASE NARA A CONTROL OUT gt SUPPLY OUT CONTROL OUT amp SUPPLY OUT CONTROL SUPPLY OUT CONTROL OUT G SUPPLY OUT Grommet Template for mounting holes Template 10 25 inches Frame Rail Washer Locknut Vise Grip Clamping Area gt Grommet Stud Trailer System Guard Air Dryer FIGURE TRAILER SYSTEM GUARD AIR DRYER INSTALLATION 2 Drill the three marked mounting holes into the frame rail using a 5 8 diameter drill 3 By hand install the studs into the three corresponding holes on the air dryer To tighten attach vise grips to the studs within 1 of the air dryer and turn 1 4 to 1 2 turns Thread damage on the stud in the area near the air dryer
6. is acceptable Care should be taken to prevent damage to the last 1 1 2 inches of the stud at the end opposite the air dryer end cover 4 Place arubber grommet with the flat side toward the air dryer over each of the installed studs 5 Align and insert the air dryer mounting studs with grommets into the 3 mounting holes on the vehicle frame rail The raised portion or shoulder of the grommets must fit into the mounting holes drilled into the frame rail 6 Install the remaining grommets on each of the mounting studs with the raised portion or shoulder toward the frame rail Ensure the shoulder fits into the frame rail mounting hole 7 Using the flat washer and locknut secure the air dryer Tighten the locknuts using a 9 16 wrench turn until the locknut washer and outside grommet just make contact no actual compression of the rubber grommet then turn two 2 more turns CONNECTING THE AIR HOSES Follow Figure 4 for air hose arrangement 1 The Trailer System Guard air dryer supply and control line fittings are 1 4 18 NPT Cut the supply and control lines and install 1 4 inch fittings Template for mounting holes 2 0 inches 12 IN CONT SUP gt Pel Trailer 6 ay 11 IN Spring l Brake System Guard Air Dryer 22 OUT 12 Relay SUP Valve Spring Reservoir Brake If the trailer is equipped with an R 12P valve the trailer sys
7. or moisture in the air brake system by opening reservoirs drain cocks or valves and checking for the presence of water If moisture is present the tractor and trailer should be checked for leaks If leakage is not excessive check the tractor air dryer for proper operation lf defective the tractor dryer should be repaired rechecking trailer reservoirs again after 3 months Ifthe tractor dryer operates satisfactorily and the trailer has not been connected to a tractor without an air dryer and the trailer glad hands were not open to the atmosphere for some extended period of time the trailer dryer should be replaced If the trailer has been connected to a tractor without an air dryer or the trailer has been parked for an extended period of time the trailer should be coupled to a tractor with an air dryer This will help the trailer air dryer remove moisture from the trailer Place the unit back in service and recheck for moisture after 3 months WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS AVOID PERSONAL INJURY OR DEATH When working on or around a vehicle the following general precautions should be observed at all times 1 Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear safety glasses 2 Stop the engine and remove ignition key when working under or around the vehicle When working in the engine compartment the engine should be shut off and the ignition key should b
8. tems guard must be mounted upstream of the R 12P valve FIGURE 4 TRAILER SYSTEM GUARD AIR DRYER PLACEMENT 2 Connect the supply and control lines to the Trailer System Guard air dryer making sure to keep the control and supply circuits separate as shown Do not switch lines end to end All ports are identified as indicated in figures 1 and 2 3 Affix the Alcohol Warning Decal to the trailer bulkhead Before applying the decal remove all oil and road contaminants from the mounting location with a good cleaning solvent OPERATIONAL TEST Build the air system to governor cutout Shut off the engine Using a soap solution check all lines and fittings leading to and from the Trailer System Guard air dryer for leakage and integrity Repair any excessive leaks exceeding a 1 bubble in 5 seconds before restoring vehicle to service TEMPLATE INCLUDED DO NOT REDUCE THIS DOCUMENT BW2083 2004 Bendix Commercial Vehicle Systems LLC All rights reserved 7 2004 Printed in U S A
Download Pdf Manuals
Related Search