Hi all! I just discovered the forum and I am thrilled. Just bought a 65 Silver Eagle last week. It runs great but had a major air leak in the brake air system. It is a cartridge located at the back which unscrews and contained a filter. It was partially filled with oil when removed but was bleeding out air due to a dent causing the seal at the top to leak. There are no markings on the housing or the filter. It is believed to be a dryer, or filter for the compressor, but despite taking it to half a dozen truck and coach places, no one has a clue what it is and how or where to get a replacement. Also, given the amount of sludge and oil in it, should the air system be "blown out" or something? Really could use the help as the bus is undriveable now.