User manual BENDIX AD-IP INTEGRAL PURGE AIR DRYER

[. . . ] Bendix® AD-IPTM Integral Purge Air Dryer DESICCANT CARTRIDGE SADDLE MOUNTING BRACKET MOUNTING STRAP SAFETY VALVE SAFETY VALVE CONTROL PORT HEATER & THERMOSTAT CONNECTOR CONTROL PORT LOWER MOUNTING BRACKET SUPPLY PORT SUPPLY PORT HEATER & THERMOSTAT CONNECTOR FIGURE 1 - AD-IPTM INTEGRAL PURGE AIR DRYER DESCRIPTION The function of the Bendix® AD-IPTM integral purge air dryer is to collect and remove air system contaminants in solid, liquid and vapor form before they enter the brake system. It provides clean, dry air to the components of the brake system which increases the life of the system and reduces maintenance costs. Daily manual draining of the reservoirs is eliminated. The AD-IPTM air dryer consists of a desiccant cartridge secured to a die cast aluminum end cover with a single, central bolt. [. . . ] The feedback line and single check valve must remain in place. AD-IPTM DI "Drop In" Air Dryer Model (Refer to Figure 3C) If the AD-IPTM DI "Drop In" air dryer is being installed on a vehicle that did not previously have an air dryer or air system aftercooler, no additional considerations are necessary. Install the AD-IPTM DI drop in air dryer in the manner described in the previous section. If the AD-IPTM DI drop in air dryer is replacing a standard AD-IPTM air dryer or air system aftercooler which incorporated an integral "Turbo Cutoff" device, the old feedback line and single check valve must be removed. If the AD-IPTM DI drop in air dryer is replacing an older style air dryer or air system aftercooler that did not incorporate an integral "Turbo Cutoff" device, the Holset ECON valve and the old feedback line and single check valve must be removed. 2. A two lead, 24 inch, wire harness with attached weather resistant connector is supplied with all retrofit and replacement AD-IPTM air dryers. Connect one of the two leads of the wire harness to the engine kill or ignition switch. The remaining lead of the wire harness must be connected to a good vehicle ground (not to the air dryer or its mounting bracket). A fuse must be installed in the power carrying wire; install a 10 amp fuse for 12 volt heaters and a 5 amp fuse for a 24 volt heater. Use 14 gauge wire if it is necessary to lengthen the wire harness provided with the AD-IPTM air dryer. Make certain all wire splices are waterproofed using the splice kit provided with all aftermarket AD-IPTM air dryers. Tie wrap or support all electrical wires leading to the AD-IPTM air dryer at 6 - 8 inch intervals. Note: Wires should have sufficient slack and not completely taught. INSTALLING AD-IPTM AIR DRYER WITH HOLSET COMPRESSOR GENERAL The vehicle installation guidelines presented in the previous section apply to all AD-IPTM air dryer installations. Vehicles equipped with the Holset Type E or QE compressor require the following additional considerations. 14 FRAME RAIL STAR WASHER 1/4" or 3/8" NUT EYELET GROUND LEAD WEATHERPROOF POWER LEAD SPLICE WIRE HARNESS CONNECTOR (TO AIR DRYER) 14 GAGE POWER WIRE FROM VEHICLE FIGURE 11 - WIRING - REMOTE POWER & LOCAL GROUND TESTING THE AD-IPTM AIR DRYER Before placing the vehicle in service, perform the following tests. Build up system pressure to governor cutout and note that the AD-IPTM air dryer purges with an audible escape of air. "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-IPTM air dryer exhaust. It is recommended that the following items be tested for leakage to assure that the AD-IPTM air dryer will not cycle excessively. (A) Total air system leakage (See Bendix publication BW5057 "Air Brake Handbook. ") (B) Compressor unloader mechanism. (D) Drain cock and safety valve in first (supply) reservoir. (E) All air connections leading to and from the first (supply) reservoir. (F) Delivery check valve. 15 AD-IPTM AIR DRYER TROUBLESHOOTING CHART SYMPTOMS 1. [. . . ] If build-up OK replace plugged discharge line. Air pressure trapped between governor and compressor · Verify safety valve operation then remove or disconnect governor from compressor & check build-up. · If build-up OK, repair or replace governor or line between governor and compressor. · If build-up NOT OK repair or replace compressor. [. . . ]