Label by the Manufacturer Nason SM-2B-85R, with a 1/8" NPT pipe thread, in the Parking Brake air line to provide a signal that the parking brake is applied.
After extensive research, we gave up on Monaco parts due to their inflated price for a OEM part, and found this adjustable replacement for the same part. The part will come set to the correct switch point as the original part had.
The OEM part, though similar to off the shelf parts at Nason, was ordered special by Monaco. The OEM part is a “SM-2B-85R” with a circuit that is closed until 85 PSI is achieved and closes again when pressure falls to approx. 72-75 PSI. The switch has screw terminals and your coach may have ring or spade connectors that will need to be replaced spade connects.
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