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Hendrickson · Air System
S-34733
In stock · ships from Knoxville
This is a Hendrickson ZMD (Zero Maintenance Damping) air spring, also known as an air bag.
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Commonly used on trailer air-ride suspensions, particularly those equipped with Hendrickson's ZMD system. Only verified fitment is for a 2019 Great Dane trailer; it may fit other makes and models using Hendrickson suspension components.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 13 of 13.
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It's a critical part of a heavy-duty truck or trailer's suspension system, using compressed air to support the vehicle's weight and provide a smoother ride. The 'damped' design with an internal plastic piston helps absorb road shock and vibration without needing a separate hydraulic shock absorber, which is why it's called 'Zero Maintenance Damping.' You would typically replace this when you notice a sagging suspension, a rough ride, or visible cracking and dry rot on the rubber bladder, often as a preventative measure when doing other suspension work.
Part Number: S-34733
AIR SPRING, DAMPED A/S
Unit: ea
Dealer: Knox Trailers
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Parts commonly needed alongside air system
