User manual BENDIX DRM DRYER RESERVOIR MODULE

[. . . ] Bendix® Dryer Reservoir Module with AD-IS® Air Dryer INTEGRATED PURGE RESERVOIR MOUNTING BOLTS (3) DESICCANT CARTRIDGE AUXILIARY DELIVERY PORTS (5) SECONDARY RESERVOIR SAFETY VALVE AD-IS Air Dryer PRESSURE PROTECTION VALVES (4) ® GOVERNOR AD-IS® AIR DRYER PART NUMBER STAMPED HERE HEATER/ THERMOSTAT FIGURE 1 - DRYER RESERVOIR MODULE DESCRIPTION The function of the dryer reservoir module (DRMTM) is to provide heavy vehicles with an integrated vehicle air dryer, secondary reservoir, purge reservoir, governor and a number of the charging valve components in a module. The DRMTM dryer module model covered in this Service Data Sheet is the first to be released, see updates to this Service Data Sheet for other models. The DRMTM dryer module includes an integrated solution air dryer (AD-IS®), a reservoir (including a separate purge reservoir section) a governor and four pressure protection valves. These have been designed as an integrated air supply system. [. . . ] Do not attempt to adjust or service the pressure protection valves - these are not service items. · · TESTING THE AD-IS® AIR DRYER Before placing the vehicle in service, perform the following tests. Build up system pressure to governor cutout and note that the AD-IS® air dryer purges with an audible burst of air, followed immediately by approximately 30 seconds of air flowing out of the purge valve. · · 7 3. "Fan" the service brakes to reduce system air pressure to governor cut-in. Note that the system once again builds to full pressure and is followed by a purge at the AD-IS® air dryer exhaust. It is recommended that the total air system be tested for leakage to assure that the AD-IS® air dryer will not cycle excessively. See Bendix publication BW-5057 "Air Brake Handbook. " completed. At end of each working day, park vehicle and slowly drain pressure through the drain valves ­ leave open to the atmosphere, for several hours if possible. When repairs are carried out, be sure to check that all reservoirs (including the purge reservoir incorporated into the secondary reservoir) are emptied of all contaminants. If after bypassing the dryer reservoir module the system pressure still does not build, use the following procedure to remove, clean and reinstall the delivery check valve. DELIVERY CHECK VALVE CLEANING PROCEDURE (Note: This is only required if system pressure does not build after temporary bypass is completed. ) See Figure 7 throughout this procedure. Depressurize the air brake system following the general safety precautions outlined elsewhere in this document. This procedure does not require removal of the AD-IS® air dryer from the vehicle. Remove line from governor and mark for easy reinstallation. Remove bolts attaching the governor to the AD-IS® air dryer and retain for reassembly. Remove governor and the adapter's o-ring. The spring/delivery check valve can now be removed. (Note: The spring/delivery check valve may be a previous design. Use a suitable solvent to clean all metal parts, and use a cotton swab to clean the bore (Note: Do not use abrasives or tools to clean the bore: any scratches caused may necessitate replacing the AD-IS® air dryer. ) Superficial external corrosion and/or pitting is acceptable. Clean the o-rings with a clean dry cloth. Inspect for physical damage to the bore and the check valve seat. If the bore is damaged (by scratches etc. that would prevent delivery check valve from seating), replace the AD-IS® air dryer. [. . . ] Check to determine if air passes through discharge line. Check for kinks, bends, excessive carbon deposits, or ice blockage. Discharge line should be constantly sloping from compressor to air dryer with as few bends as possible. Replace air dryer (pressure protection valves are not serviceable). [. . . ]