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. The function of the AD-IS® air dryer is to collect and remove air system contaminants in solid, liquid and vapor form before they enter the brake system. [. . . ] 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 be 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. Do not 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. If the 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. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. 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. AD-IS® AIR DRYER GOVERNORS ARE NONADJUSTABLE AND FEATURE A BREATHER VALVE IN THIS PORT PRESSURE PROTECTION VALVE LOCATIONS FIGURE 5 - PRESSURE PROTECTION VALVE LOCATIONS WARNING: DO NOT ATTEMPT TO ADJUST OR SERVICE THE PRESSURE PROTECTION VALVES. INCORRECT PRESSURE PROTECTION VALVE SETTINGS CAN RESULT IN AUTOMATIC APPLICATION OF VEHICLE SPRING BRAKES WITHOUT PRIOR WARNING. 6 LOCK TABS SPLASH SHIELD COVER SPLASH SHIELD BRACKET FIGURE 6 - SPLASH SHIELD BRACKET AND COVER - (EXPLODED VIEW) GENERAL When rebuilding or replacing components of the air dryer use only genuine Bendix parts. For ease in servicing, the AD-IS® air dryer has been designed so that any of the following maintenance kits can be installed without removing the air dryer from the vehicle. If, after completing the routine operation and leakage tests, it has been determined that one or more components of the air dryer requires replacement or maintenance, refer to the following list to find the appropriate kit(s). · Service New Purge Valve Housing Assembly: Contains a service new assembly and related components to change the purge valve sub-assembly. AD-IS® Air Dryer Replacement: Replaces the complete air dryer assembly. Purge Reservoir Drain Valve: Replaces the drain valve on the purge reservoir. · · · · MAINTENANCE KITS AVAILABLE: · Service New Desiccant Cartridge Kit: This kit contains the parts necessary to change the desiccant cartridge only. Delivery Check Valve Maintenance Kit: This kit contains the parts necessary to replace the delivery check valve. Governor/Delivery Check Valve Kit: This kit contains the parts necessary to replace both the governor and delivery check valve. 12 volt or 24 volt Heater and Thermostat Kits: Contains a replacement heater and thermostat assembly and related components required for replacement. Purge Valve Housing Maintenance Kit: This kit contains the parts necessary to rebuild the purge valve subassembly. SEE CATALOG PAGE 98-A-1 FOR FULL LIST OF MAINTENANCE KITS AVAILABLE. NOTE: There is no kit available for the servicing of the pressure protection valves (See Figure 5). 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. [. . . ] If the vehicle is equipped with high air usage accessories such as trailer pump-off systems or central tire inflation, the air for these accessories must by-pass the dryer. Purge (air exhaust) time insufficient due to excessive system leakage. E. If vehicle uses Holset compressor, inspect feedback check valve for proper installation and operation. Refer to Symptom 1. 11 DRMTM/AD-IS® AIR DRYER TROUBLESHOOTING CHART (Continued) SYMPTOMS 3. [. . . ]