Genuine Paccar 25523011 OEM cab air spring service kit, used on Kenworth and Peterbilt sleeper cabs as the air-suspended cab mount. Same part number as Kenworth T81-6001, supplied as a complete air-spring assembly including bellows, top plate, and piston in one service kit. Crosses to Firestone W02-600-7122 and Link 1104-0007. Signs You Need a New Cab Air Spring Cab sagging or sitting unevenly when parked overnight Audible air leak at the bag, top plate, or piston seal Cracks, dry rot, or weather-checking on the bellows Cab no longer holds height once the air system pressurizes Harsh ride or excessive cab bounce over road inputs Specifications Manufacturer Paccar (Genuine OEM) Part Number 25523011 Part Type Cab Air Spring — Service Kit Application Kenworth / Peterbilt sleeper cab air mount Cross References This cab air spring replaces or is equivalent to the following part numbers: Paccar: 25523011 Kenworth: T81-6001 Firestone: W02-600-7122 Link: 1104-0007, 1104-0016 Automann: ABSZ70-6001 Applications This cab air spring fits the following Kenworth and Peterbilt sleeper-cab air-mount configurations: Kenworth T680 sleeper cab Peterbilt 579 sleeper cab Other Paccar sleeper-cab platforms calling out 25523011 / T81-6001 Verify your cab suspension configuration and air spring location before ordering. Different Paccar cab air springs (e.g., T81-6000, T81-6002) appear visually similar but use different mounts.
