Just put a reman AD-9 on my truck with an N14 C+ (I bet you can guess where this is going) with a QE style compressor. This compressor needs a 4 port dryer, so I had to drill and tap a new port for the "Econ Valve." Trouble is, this reman dryer has a hard seat purge valve, and this setup needs a soft seat, which I was unaware of at the time of purchase. Do the hard and soft seat valves use the same housing? I'd rather not pay $300 for a whole new purge valve since that's more than the whole dryer cost, and instead just rebuild the valve with a soft seat kit
Bendix AD-9 soft vs hard seat purge valve
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by NebraskaGMC, Jan 8, 2025.
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https://static.nhtsa.gov/odi/tsbs/2013/SB-10052462-6952.pdf
A soft seat can be substituted for a hard seat.Rideandrepair and NebraskaGMC Thank this. -
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Curious to hear how others manage maintenance on these – do you stick to OEM parts or go for aftermarket replacements? Also, any tips on extending the life of the purge valve would be awesome to hear!
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arthurjohnston Thanks this.
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