The All-In-One Electronic Height Control

Link’s SmartValve is the first of its kind an all-in-one electronic height control. SmartValve eliminates the need for separate components that make up other electronic suspension control systems, reducing cost, preventing injuries, and saving fuel.

With the weight of the trailer fully resting on the landing gear, the effort used in cranking the landing gear can result in injuries to the driver. When SmartValve is installed on the tractor, drivers can raise the suspension above ride height as well as dump to avoid struggling against the weight of the trailer, even fully loaded.

SmartValve advances the safety of the suspension, reduces air consumption, and maintains precise control of driveline angles. Advanced capabilities include automatic ride height functionality to raise and lower the suspension. SmartValve, can optimize vehicle aerodynamics to save fuel with its onboard J1939 controller and the ability to customize safety interlocks and performance parameters.

Including customizable software and reduced downtime, the Link SmartValve is the ideal height control valve solution for nearly any tractor or transit application. Made out of high quality, durable materials, the SmartValve is the most reliable option in the industry today.


  • A trailer parked too high to reach the kingpin plate

    Trailer Parked Too High

    With SmartValve the driver can couple the tractor and trailer by simply raising over ride height to reach the trailer king pin and allow for easy final adjustment of the landing gear.

  • A man in a safety jacket cranking a landing gear

    Reduce Driver Fatigue

    SmartValve allows the driver to reduce pressure on the landing gear by raising the suspension. Drivers can then crank the landing gear up with less effort and in just a few seconds.

  • A man with a hand on his back indicating pain next to a landing gear on a truck trailer

    Reduce Back & Shoulder Injuries

    Varying trailer heights require multiple trips in and out of the cab as well as 80-120 lbs of force to be applied to the landing gear crank to raise and 20-50 lbs to lower a loaded parked trailer.

  • A semi cab driving down a lane with several trailers

    Increase Uptime

    Trailer lots are often unmanned and packed too tight to access hand crank. With SmartValve drivers no longer need to wait for spotters to pull trailers out far enough to reach landing gear.

  • A semi truck with an enclosed trailer driving past several parked trailers

    Auto Return To Ride Height

    SmartValve’s safety feature maintains accurate ride height at all times using self-monitoring CAN signals. The suspension will return to ride height automatically at 7 mph.

  • Hands installing a SmartValve unit

    Simple Retro-Fit

    The SmartValve fits within the same envelope as mechanical height control valves. Preset heights can also be programmed for easy coupling and uncoupling of trailers.

  • A blue semi cab hooking up to a trailer

    Reduce Landing Gear Damage

    Hooking up to an off-centered trailer often binds and damages the landing gear. SmartValve allows the trailer to be lifted for added clearance when hooking up.

  • A trailer parked too low to connect to the kingpin plate

    Trailer Parked Too Low

    With SmartValve the driver simply raises the tractor frame over ride height, thus lifting the trailer and reducing the effort needed to crank the gear.

  • A truck pulling out a trailer for access to a the landing gear

    Trailers Parked Too Tight

    With SmartValve the driver simply raises the tractor frame over ride height, lifting the trailer and landing gear enough to pull the trailer out to access the gear.


“The SmartValve is fantastic. Not only for leveling purposes but also for raising suspension during hookup to take pressure off landing gear. Outstanding find and addition to the tractors! The SmartValve is a home run.” Truck Driver
“The driver tells me she has had back problems in the past and the SmartValve has saved her back. After hearing from her and other drivers, I’m thinking this should be standard equipment on all trucks.” Fleet Manager
“Great for ice drips, pick ups, tight docks where crank handle is inaccessible. Saves a lot of time lowering trailer legs onto 5th wheel plate. All in all, great addition!” Truck Driver
“The system works great and is a blessing when backing under trailers which have been dropped way too high. I prefer driving a truck with SmartValve.” Truck Driver
“I have seen a remarkable improvement in our driver’s work ethic and attitude. SmartValve made our drivers life easier and eliminated wasted time hooking up high and low trailers.” Fleet Manager
“Works great and makes my job safer, easier, and more time efficient. Saves a lot of time cranking trailers lower to hook up!” Truck Driver


Product Codes

Note: SmartValve requires tractors with 250 Kbps J1939 CanBus (typically found on vehicles 2006 and newer) for passive signal use. An additional module is required for tractors with 500 Kbps J1939 CanBus.


Warranty Registration