Air compressor governor made by Haldex. OEM part, made in USA. P/N N30190DA, 10900525 and replaces N-20856-D, 10900525-3. NSN 2530008544457 and replaces 2530012228795.
This part fits Military trucks such as M35A2, M809 series, M939 series, etc. Also for many types of commercial trucks with air brakes.