Description
15’COILED AIR HOSE ASSY
Part Number: F11952C
Direct replacement (cross ref) for 11952.
Product Overview
This 15-foot coiled air hose assembly connects the tractor and trailer air systems and carries compressed air between them. It replaces OEM part 11952 and is built for heavy-duty truck applications where constant coupling, turning, and road movement put stress on the hoses.
Air hoses take a beating every day from weather, vibration, dirt, and stretching during turns. Once they start cracking or leaking, brake system performance can suffer fast.
What the Part Does
The air hose assembly transfers compressed air from the tractor to the trailer for service and emergency brake operation. The coiled design allows the hose to flex during turns without dragging or getting pinched.
A good hose keeps steady air pressure moving through the system and helps the trailer brakes respond correctly. These hoses work directly with gladhand connections and seals at the rear of the tractor.
Common Problems This Part Solves
Old or damaged air hoses often cause:
- Air leaks between tractor and trailer
- Cracked outer hose material
- Kinked or collapsed hose sections
- Slow trailer brake response
- Audible hissing while driving
In winter climates, road salt and freezing temperatures can shorten hose life even faster.
Why Replacement Matters
A leaking air hose doesn’t just waste air. It forces the compressor to work harder and can affect trailer brake response. In serious cases, major leaks can create low-air situations that shut down the system.
Replacing worn hoses helps avoid roadside issues and DOT problems.
Compatibility and Fitment
This hose assembly replaces OEM part number 11952. Always verify hose length, gladhand style, and fitting configuration before ordering.
Too-short hoses can stretch during turns, while excessively long hoses may drag and wear prematurely.
Installation and Service Notes
Installation is straightforward, but routing matters. Make sure the hoses have enough movement for turning without rubbing against catwalks, frame rails, or sharp edges.
Inspect gladhands and seals during replacement. A worn Red Gladhand Seal or blue service seal can still cause leaks even with new hoses installed.
After installation, check for leaks under full air pressure.
Use Case
Commonly replaced during trailer air system service, gladhand repairs, or preventive maintenance on high-mileage trucks.
About Us
We’re a family-owned group of Peterbilt dealerships dedicated to getting you the parts you need quickly and affordably. Whether you’re looking for Paccar OEM parts, reliable aftermarket replacements, or popular upgrades like seats and filters, we make it easy to keep your truck running and on the road. If you don’t see what you need online, just give us a call or send an email — chances are we can get it. We pride ourselves on fast service, fair prices, and being a partner you can depend on when downtime isn’t an option.
