4.Position the end cover as marked during removal and install the retainer ring so that the gap in the ring is within an inch of the notch in the body.
5.Grease the threads on the three cap screws and reinstall them with their retainers in the end cover.
6.Reconnect the air control line to the purge valve port in the end cover.
7.Reconnect the thermostat and heater wire.
8.Test the air dryer as outlined under the Preventive Maintenance and Checking Serviceability Section of this manual.
INSTALLATION OF AD-1™ AND AD-2™ AIR DRYER
1.Install the air dryer in the compressor discharge line as close to the supply (first) reservoir as possible. The discharge line between the compressor and air dryer must not exceed 20 feet in length nor less than six feet in length for a two cylinder compressor or ten feet in length for a single cylinder compressor. Six feet of discharge line and a 90 cubic inch reservoir can be used in lieu of ten feet of discharge line for single cylinder compressors.
The discharge line should slope downward from the compressor to the air dryer inlet to avoid water traps and to allow drainage to the air dryer. (If the 90 cubic inch reservoir is used, it should also be mounted and plumbed to avoid water traps and to allow drainage into the air dryer.) Discharge lines may be either be copper tubing or high temperature hose. However, Bendix compressors require a minimum of four feet of copper tubing extending from the discharge port. The balance of the discharge line may be either copper tubing or high temperature hose.
2.Locate outside the engine compartment in an area of air flow when the vehicle is in motion. Do not mount near exhaust system or other
3.Mount vertically, with purge valve exhaust toward the ground, away from the frame and other components. Connect a hose to the exhaust cover if necessary, since this valve may expel rust and scale particles as well as condensate and oil collected in the dryer.
4.Connect the purge valve control port to one of the governor unloader ports. This line should be routed such that no water traps are formed.
5.For the dryers with a
6.Connect a fused #16 gauge wire from the “on” position of the engine control or ignition switch to the heater
terminal. This connection must be waterproof. Use an 8 to 10 amp. fuse with 12 volt end covers and with 24 volt end covers identified with the marking “24V 120W.” Use a 4 to 5 amp. fuse with 24 volt end covers identified with the marking “24V.”
IMPORTANT NOTE: A new 24 volt heater was introduced in 1983. The new heater version draws 120 watts of power and requires an 8 to 10 amp fuse. End covers with the new heater are identified with the marking “24V 120W” cast on the identification boss of the end cover. The previous identification was “24V”.
MAINTENANCE KIT FOR THE AIR DRYER
286718 DESICCANT CARTRIDGE REFILL KIT
This kit can only be used on new revision cartridges. See the cartridge rebuild section of this manual for proper identification of current revision cartridge. This kit contains the necessary parts to rebuild the cartridge and the desiccant sealing plate.
287313 DESICCANT CARTRIDGE REPLACEMENT KIT This kit contains a factory replacement desiccant cartridge and the parts necessary to rebuild the desiccant sealing plate.
285519 AD-1™ AIR DRYER PURGE VALVE MAINTENANCE KIT
This kit contains the parts necessary to rebuild the
287053
This kit contains the parts necessary to rebuild the
287298 AD-2™ AIR DRYER CHECK VALVE MAINTENANCE KIT
This kit contains the components necessary to rebuild the inline single check valve that is used in
288918 THERMOSTAT COVER REPLACEMENT KIT This kit contains the parts required to replace the
102657 THERMOSTAT MAINTENANCE KIT
This kit contains the necessary components to rebuild the thermostat assembly in the
101900 REMANUFACTURED DESICCANT CARTRIDGE AND DESICCANT SEALING PLATE.
This unit allows for complete exchange, as a unit, of the cartridge and desiccant plate.
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