Trailer

There are two ways to increase the lift when using a UBL system.
   Option 1: Increase Ride Height

• Refer to Hendrickson Literature No. L801 Liftable Application Guide for instructions. 

   Option 2: Convert to a Hendrickson low-ride suspension, if possible.

• If currently using a Hendrickson top-mount suspension consider switching to a Hendrickson low-ride suspension, to help provide more lift when using a UBL system.  
• Remember, the original manufacturer of the trailer should be contacted for approval and recommendations before making any modifications to the trailer. 

For additional assistance regarding specific trailers or applications, contact the Hendrickson Trailer Commercial Vehicle Systems product engineering department in the United States at 866-RIDEAIR (743-3247), in Canada at 905-789-1030 or in Mexico at +52 (442) 296-3600.

Start with choosing products that offer good corrosion-resistant coatings.
 
Second, work with the component supplier to determine the proper coating cleaning and maintenance specifications, and implement a cleaning/maintenance schedule to extend the life of the coating.
 
Regular inspections will also help to identify corrosion issues early enough to address the issue before it becomes a bigger problem.
 

Both TIREMAAX PRO and CP models are set to a specified target pressure for inflation. As long as the pressure in the trailer air tank is above the target pressure, the TIREMAAX controller will continuously supply and maintain tire pressure at target.
 
For TIREMAAX PRO, all check valves or wheel valves are open to allow air flow in both directions, equalizing pressure across all wheel positions. PRO also has the ability to relieve pressure from over-inflated tires. The relief pressure is set at 10 psi above the cold target pressure. If tire pressure goes above this setting, the TIREMAAX PRO controller will exhaust air and maintain pressure at the preset relief value.

No. Brakes should be chosen based on the highest required load and no higher. For instance, hub, suspension, axle and tire ratings may all differ on a given trailer, ranging from 17,000 to 26,000 pounds or higher depending on the trailer application.
 
However, it is the minimum rated component of this group that determines the gross axle weight rating (GAWR), and brakes should be sized according to the GAWR.
 
Using an overrated brake lining on your application can lead to excess brake torque which can result in tire wear, brake wear, noise and trailer hop.

Please refer to Hendrickson Literature No. L388 - Ride Height Settings for your designed height, minimum height, and maximum height per your suspension model.