Description
Power Products 950014P purge valve repair kit for WABCO / Meritor System Saver 1200, 1200P, and 1800 air dryers. Direct replacement for Meritor R950014 / 4324139292 and Volvo 3918353. Rebuilds the spool-type purge valve so the dryer can vent properly at governor cut-out instead of leaking continuously – typically the cheapest fix for a dryer that won’t stop hissing or that cycles the compressor every 10-30 seconds.
Signs You Need a New Purge Valve Kit
- Continuous air leak from the air dryer purge exhaust after the system reaches cut-out
- Air compressor cycling rapidly every 10-30 seconds rather than at normal intervals
- Purge valve “popping” or sticking during the unload cycle
- System won’t build full air pressure (stays below 100 PSI)
- Excessive moisture in the wet tank or service reservoirs
- Audible hissing at the dryer when the truck is parked at full pressure
- Loss of turbo boost during the compressor unload cycle
- Dryer not back-flushing the desiccant cartridge at governor cut-out
Specifications
| Manufacturer | Power Products |
|---|---|
| Part Number | 950014P |
| Part Type | Purge Valve Repair Kit |
| Application | WABCO / Meritor System Saver 1200, 1200P, 1800 air dryers |
| Voltage | Compatible with 12V and 24V dryer systems |
Kit Includes
- Piston assembly
- Valve head
- Spring
- O-rings
- Shims
- Washer
- Retainer ring
Cross References
This part replaces or is equivalent to the following part numbers:
- Meritor / WABCO: R950014, 4324139292
- Volvo: 3918353
- Automann: 170.950014
- World American: WAR950014
- Newstar: S-18750
- TDA: TDAR950014
- Ancra: AV9514, AV950014
- ATP: AT950014
- Fortpro: F224895
Applications
This purge valve repair kit fits WABCO / Meritor System Saver 1200, 1200P, and 1800 air dryers found on:
- Freightliner: Cascadia, Columbia, Century, Coronado, M2, FLD, Classic
- Kenworth: T680, T880, T800, W900, T660, T370, T270, C500
- Peterbilt: 579, 389, 388, 387, 386, 384, 379, 378, 367, 365
- Volvo: VNL, VNR, VNM, VHD
- Mack: Anthem, Pinnacle, Granite, CXU, CHU, GU
- International: ProStar, LoneStar, LT, 9900, 9400, 9200
- Western Star: 4900, 5700, 4700
- Motor coaches, RVs, and buses with WABCO System Saver air dryers
Installation tips: Drain all air tanks before disassembly. If shims are included with your dryer, install them above and below the spring per the OEM service procedure. Do not grease the rubber diaphragm or valve seat. After installation, leak-test and verify the purge cycle at governor cut-out. For best results, replace the purge valve kit whenever the desiccant cartridge is changed.
Verify your air dryer model before ordering. This kit fits the System Saver 1200/1200P/1800 family. Other System Saver variants (e.g., Twin Cartridge) may use a different kit.
