Description
The Automann 170.KN28600 is a premium aftermarket FF-2 type full function trailer brake valve that serves as a direct replacement for the Haldex/Midland KN28600. This single valve combines the functions of pressure protection, two one-way check valves, a spring brake valve with quick release, and a four-port relay valve into one compact, corrosion-resistant unit. Built-in anti-compounding protection prevents simultaneous application of service and spring brakes, eliminating broken foundation brake components and maintaining FMVSS-121 compliance.
Signs You Need a New Full Function Valve
- Spring brakes not releasing fully or releasing slowly after charging
- Trailer brakes dragging or not applying evenly
- Audible air leaks from the valve body or exhaust ports
- Compounding of service and spring brakes causing foundation brake damage
- Trailer air pressure dropping below normal operating range
Specifications
| Manufacturer | Automann |
|---|---|
| Part Number | 170.KN28600 |
| Part Type | FF-2 Full Function Trailer Brake Valve |
| Supply Port | (1) 3/8″ NPT |
| Control Port | (1) 1/4″ NPT |
| Reservoir Port | (1) 3/4″ NPT |
| Service Brake Ports | (4) 3/8″ NPT |
| Spring Brake Ports | (2) 3/8″ NPT |
| Crack Pressure | 3.0 PSI |
| Compliance | FMVSS-121 |
| Integrated Functions | Pressure protection, two one-way check valves, spring brake with quick release, four-port relay |
| Warranty | 1 year |
Cross References
This valve replaces or is equivalent to the following part numbers:
- Haldex/Midland: KN28600, KN-28600, KN28600N, KN28600RX, N4304, N4304AC
- Bendix: BEN-KN28600X, 28600, OTR28600
- Meritor: R955KN28600X, R955KN28600N, RKN286000
- PAI: FTV-4075, 4075, EM40750
- Mack: 5396-KN28600X, 5396KN28600
- Freightliner: HDXKN28600
- Navistar: ZZKN28600
- Euclid: EMDKN28600N
- Rockwell: EMDKN28600N, E-MDKN28600N
- Velvac: 34060
- Tramec Sloan: 401221
- Tectran: TV28600
- Wabash National: 39300584
- Newstar: S-22187
- Dayton Parts: AVKN28600
- Globetech: GTA28600
Applications
The FF-2 full function valve is a universal trailer air brake valve used across a wide range of commercial trailer applications:
- Dry van and refrigerated trailers
- Flatbed and drop-deck trailers
- Tanker trailers
- Dump trailers
- Ready-mix concrete trailers and heavy haul equipment trailers
This valve is found on trailers originally equipped with Haldex/Midland FF-2 series valves and is commonly used across all major trailer manufacturers including Great Dane, Wabash, Utility, Vanguard, Hyundai Translead, and Stoughton.
Verify your current valve model and port configuration before ordering to confirm fitment.
