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Air Dryers
Maintenance & TroubleshootingThe job of the air dryer is to keep up with the demand for air pressure while effectively reducing the moisture in the air. A high frequency of cycling and the presence of water anywhere in the system may indicate a problem. Bendix Service Data for the AD-9 recommends how often you check the system (about every 25,000 miles) and explains in detail what to look for.
If you find water, the obvious cause is that the desiccant requires replacement, but there are other possible causes. Unusually high air usage might not allow the compressor to load and unload in a normal fashion. This in turn would not allow the air dryer to purge normally and the efficiency of the desiccant would be compromised. |
Of course, high air usage might indicate a leak in the system and there are several places to check for leaks. You can expect under normal operations for a line-haul truck that the desiccant cartridge could last up to 300,000 miles or 36 months. If the air dryer is not close to that service life, then its time to look more closely.
Two additional factors should be kept in mind. How is the truck currently being used compared to the use for which it was designed? And are there accessories other than brakes that are making demands on the air charging system? At Plaza you will find kits for the two most commonly required air dryer maintenance issues: a desiccant cartridge kit and a purge valve maintenance kit. We stock air dryers, cartridges, and repair kits by Bendix, Haldex, and Meritor-Wabco. The items below are currently in stock. |
Air Dryer Components Currently in Stock
Supplier | PN | model | Description |
Bendix | 065041X | AD-4 | AD-4 air dryer 12 v. .5' ports |
Bendix | 065044X | AD-4 | reman end cover for 12 volt .5' port unit |
Bendix | 101900X | AD-2 | reman AD-2 air dryer dessicant cartridge kit |
Bendix | 107794X | AD-9 | reman AD-9 cartridge |
Bendix | 109477X | AD-IP | reman AD-IP air dryer |
Bendix | 109493X | AD-IP | reman AD-IP cartridge |
Bendix | 109685X | AD-9 | reman AD-9 air dryer |
Bendix | 286875RX | AD-2 | reman end cover for 12 volt 60 w heater unit |
Bendix | 286934RX | AD-2 | air dryer & installation kit |
Bendix | 5004341X | AD-9 | reman AD-9 purge valve kit with heater |
Bendix | OR104358X | AD-4 | reman dessicant cartridge |
Haldex | 41210026 | pre-dryer | Consep® water condenser-oil separator |
Haldex | DA33115 | PURest | Purge Assembly Kit for Pure Air Plus™ and PURest® Air Dryer |
Haldex | DA33120 | Pure | 2 lb. Desiccant Cartridge Only - for Pure Air Plus™ |
Haldex | DA34100 | PURest | PURest air dryer oe pn N4253AA |
Haldex | DA34200 | PURest | PURest® Air Dryer 12 v. |
Haldex | DA35100 | DRYest | DRYest air dryer |
Haldex | DA36100 | Modulair | ModulAir® Dryer |
Haldex | DQ6026 | Pure | Pure Air Plus air dryer cartridge replacement kit |
Haldex | DQ6027 | PURest | Extended Purge Kit (Tank) Pure Air Plus™ & PURest® Air Dryer |
Haldex | DQ6032 | Pure | Coalescing Filter Kit for Pure Air Plus™ |
Haldex | DQ6050 | PURest | MTC Desiccant Cartridge Kit for PURest® Air Dryer |
Meritor | R109994 | AD-SP | new AD-SP air dryer cartridge |
Meritor | R950011 | SS | dessicant cartridge for SS 1000, 1200 air dryers |
Meritor | R950012 | SS | REGEN VALVE KIT |
Meritor | R950013 | SS | SS1200 turbo cutoff valve kit |
Meritor | R950014 | purge valve repair kit for single cartridge air dryers | |
Meritor | R950015 | SS | 12 v heater repair kit for SS series air dryers |
Meritor | R950017 | SS | check valve repair kit for SS1200 and SS1800 air dryers |
Meritor | R950018 | bypass valve repair kit | |
Meritor | R950047 | SS | turbo cut-off valve kits |
Meritor | R955065225X | AD-9 | reman AD-9 air dryer |
Meritor | R955107794X | AD-9 | REMAN AD9 CARTG |
Meritor | R955107796N | AD-9 | NEW AD9 CARTG |
Meritor | R955205 | SS | System Saver 1200 air dryer repair kit |
Meritor | R955205NX | SS | reman SS1200 air dryer, 12 volt |
Meritor | R955207 | SS | System Saver 1200E air dryer, 12 volt |
Meritor | R955300 | SS | System Saver 1200P Air Dryer, 12 Volt |
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