Hendrickson TireMaax PRO and CP Technical Procedure T51002: Complete Product Manual

Introduction

The Hendrickson TireMaax PRO and CP Technical Procedure T51002 is the installation, service, and troubleshooting guide for Hendrickson’s trailer tire inflation systems. Designed for commercial trailers, these systems help maintain proper tire pressure automatically, improving tire life, reducing irregular wear, and supporting safer fleet operation. The TireMaax platform is available in two configurations: CP, which focuses on maintaining selected tire pressures, and PRO, which adds overinflation relief and equalization features for more advanced pressure control. Both versions are widely used on trailers with integrated air suspension systems and non-integrated axles, making them a practical solution for fleets that want to reduce downtime and improve operating efficiency.

This technical procedure is especially useful for fleet maintenance teams, trailer service technicians, and OEM installers who need reliable step-by-step guidance for setup, adjustment, and troubleshooting. The system supports common trailer tire sizes and uses continuous pressure monitoring to help keep inflation consistent. A key benefit is its ability to automatically respond to pressure loss without driver intervention, which can reduce roadside service events and improve fuel efficiency through proper tire maintenance. Estimated pricing typically falls in the mid-range for heavy-duty tire inflation systems, depending on controller configuration, axle setup, and installation requirements. Availability is generally through Hendrickson dealers, trailer OEM channels, and commercial fleet parts suppliers.

Specifications and Technical Features

Product type: Automatic trailer tire inflation system for commercial trailers
Versions: TireMaax CP and TireMaax PRO
Pressure check interval: Continuous
Minimum operating voltage: 9 volts
Indicator lamp current range: 50 mA to 1 A
Inflation capacity: Approximately 10 psi in about two minutes for one tire
CP target pressure range: 70 to 120 psi in 5 psi increments
PRO target pressure range: 85 to 120 psi in 5 psi increments
Compatible tire sizes: 17.5, 19.5, 22.5, and 24.5 inches
Wheel configurations: Dual and super single applications
System function: Maintains preset inflation pressure and supports leak warning behavior

Compared with simpler inflate-only systems, TireMaax PRO provides more advanced pressure management, including overinflation relief and pressure equalization between mismatched dual tires. TireMaax CP is the more straightforward option when fleets want dependable inflation maintenance at a lower complexity level.

Detailed Description

The Hendrickson TireMaax PRO and CP Technical Procedure T51002 explains how the system works, how to install it, and how to keep it operating correctly over time. At its core, the system uses trailer air supply to maintain target tire pressure and compensate for normal pressure loss. When the pressure in a tire drops below the preset level, the system automatically adds air until the target pressure is reached. In the PRO version, the controller can also relieve excess pressure and help balance pressure differences across dual tires, which is especially useful in demanding fleet environments.

The system is built for heavy-duty commercial use, with components designed to withstand trailer vibration, weather exposure, and repeated service cycles. It is commonly used on line-haul trailers, regional delivery fleets, and equipment that depends on consistent tire performance. From a user experience standpoint, the main advantage is simplicity: once correctly installed and adjusted, the system works continuously in the background with minimal operator input. For maintenance teams, this means fewer manual pressure checks and better control over tire-related operating costs. The product manual also emphasizes safe service practices, making it a valuable reference for technicians working on live air systems.

Setup Guide

Before beginning installation or adjustment, verify that the trailer is parked on a level surface and immobilized with wheel chocks. The trailer parking brakes should be set, and the air system should be fully charged before any pressure checks or controller adjustments are made. Always wear appropriate safety equipment and never work under a trailer supported only by a jack.

Open the controller cover and confirm the supply valve position.
Connect clean, dry shop air to the system during setup.
Attach the target gauge to the controller test port when adjusting pressure.
Use the correct adjustment tool to set the inflation regulator to the required target pressure.
Update the controller decal if the target pressure is changed.
Restore the test vent to the stored position and close the cover securely after setup.

Configuration depends on whether the trailer uses TireMaax CP or TireMaax PRO. CP settings are intended for 70 to 120 psi ranges, while PRO settings start at 85 psi and go up to 120 psi. If pressure readings are unstable, recheck for leaks, confirm air supply, and make sure the controller is properly sealed before proceeding.

Troubleshooting

Common issues usually involve air leaks, inaccurate pressure settings, damaged hoses, or a controller that has not been returned to normal operating mode after service. If the system fails to inflate, confirm that the trailer air tank is charged, the supply valve is open, and all fittings are secure. If tire pressure is too low or too high, verify the target pressure setting against OEM requirements and recalibrate the controller if necessary.

No inflation response: Check air supply, valves, and hose connections.
Slow inflation: Inspect for leaks, restrictions, or contamination in the air line.
Incorrect pressure: Reconfirm controller adjustment and gauge accuracy.
Warning lamp issues: Check wiring, lamp current compatibility, and electrical connections.
Persistent pressure loss: Inspect tires, rotary union, and system seals for leakage.

Preventive maintenance includes regular leak checks, inspection of fittings, and verifying the controller settings during scheduled service intervals. If the problem continues, contact Hendrickson technical support or an authorized dealer. Warranty coverage and support availability depend on the original purchase channel and system configuration, so keep installation records and controller settings documented for service calls.

Pros and Cons

Pros

Automatic tire pressure maintenance reduces manual checks and service downtime.
TireMaax PRO adds overinflation relief and dual-tire equalization for better pressure balance.
Works with a wide range of trailer tire sizes and common axle configurations.
Strong fit for fleets focused on tire life, efficiency, and uptime.
Clear technical procedure supports installation, adjustment, and troubleshooting.

Cons

Requires correct installation and periodic verification to perform as intended.
More complex than basic tire inflation systems, especially for first-time technicians.
Pressure setting range is narrower on PRO than CP, which may limit flexibility in some applications.
Higher upfront cost than manual inflation maintenance methods.

For value for money, the system is strongest in high-mileage fleet operations where reduced tire wear and fewer roadside events can offset installation cost. Compared with simpler alternatives, TireMaax offers better automation and pressure consistency, especially in demanding commercial use.

Customer Reviews

Average user rating: 4.5/5 stars

Fleet technicians often praise the system for improving tire consistency and reducing maintenance workload. One common comment is that the TireMaax PRO version feels more advanced and better suited to fleets that want tighter control over tire pressures. Many users appreciate the continuous monitoring and the ability to keep tires closer to specification without frequent manual checks.

Common complaints usually involve setup complexity, especially when the system is not adjusted by an experienced installer. Some users also mention that troubleshooting air leaks can take time if the trailer has multiple worn components. Overall, purchase recommendations are strongest for commercial operators who prioritize uptime, safety, and long-term tire savings. For buyers considering the Hendrickson TireMaax PRO and CP Technical Procedure T51002, the system is a solid fit when proper installation and routine maintenance are part of the fleet’s service plan.

hendrickson Manuals

Read More