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Hendrickson TIREMAAX PRO Technical Procedure

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CP
QUICK REfERENCE GUIDE
First become familiar with the
information on page 4 through
page 12, then refer to the following
pages for installation instructions on
suspensions with:
• TIREMAAX
, DRESSED axles on
®
page 23 through page 37.
• TIREMAAX, UNDRESSED axles on
page 13 through page 37.
• All other axles, pre-drilled, on
page 16 through page 37.
• All other axles, not drilled, on
page 13 through page 37.
PRO
TECHNICAL
PROCEDURE
TIREMAAX
PRO AND CP
®
TIRE INflATION SySTEMS
SUBJECT: Installation, Service and
Troubleshooting Procedures
lIT NO: T51002
DATE: April 2015
NOTE: For information on TIREMAAX
systems purchased prior to April
2012, refer to L995.
REVISION: E
CP
®

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Do you have a question about the TIREMAAX PRO and is the answer not in the manual?

Questions and answers

Jim
February 4, 2025

How do you set the tire pressure at the controller tiremaax pro?

0
1 comments:
Mr. Anderson
February 10, 2025

The tire pressure setting for the Hendrickson TIREMAAX PRO system is preset within a range of 85 to 120 psi (586 to 827 kPa). The system automatically maintains the target pressure and includes a deflation feature that exhausts excess pressure above the preset deflation level. Adjustments to the target pressure should be made according to OE specifications.

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Summary of Contents for Hendrickson TIREMAAX PRO

  • Page 1 TECHNICAL PROCEDURE TIREMAAX PRO AND CP ® TIRE INflATION SySTEMS SUBJECT: Installation, Service and Troubleshooting Procedures lIT NO: T51002 DATE: April 2015 REVISION: E NOTE: For information on TIREMAAX ® systems purchased prior to April 2012, refer to L995. QUICK REfERENCE GUIDE First become familiar with the information on page 4 through page 12, then refer to the following...

  • Page 2: Table Of Contents

    Conventions Applied in this Document ....................4 Explanation of Signal Words ......................4 Links ..............................4 General Service Notes ..........................4 During Service: ..........................4 Important Safety Notices ........................5 Contact Hendrickson ........................6 email ............................6 Phone ............................6 Literature ............................6 Preparing Trailer for Service .......................7 General Information ..........................8 About this Manual ..........................8...
  • Page 3 InstallatIon, servIce and troubleshootIng Procedures Wire Harness Options And Details ....................33 Standard Wire Harness Installation .....................34 Abs Junction Wire Harness Installation ..................34 Adding Restraint To Wiring ......................34 Trailer-Mounted Indicator Lamp Installation .................35 System integrity check ........................35 System setup ............................35 Decal Location ..........................36 Troubleshooting ..........................37 Troubleshooting procedure ......................37 Troubleshooting Matrix ........................38...

  • Page 4: Conventions Applied In This Document

    This section explains the techniques used in this information included in EXPLANATION document to convey important information, safety OF SIGNAL WORDS. issues, how to contact Hendrickson and how to apply hyperlinks. Before you begin: EXPlANATION Of SIGNAl WORDS Read, understand and comply with: Hazard signal words (such as DANGER, WARNING •...

  • Page 5: Important Safety Notices

    The procedures recommended by follow the manufacturer’s Hendrickson and described in this publication are recommended instructions and methods of performing inspection, maintenance, guidelines carefully to help service and repair.

  • Page 6: Contact Hendrickson

    Hendrickson suspension: ordering for trailer manufacturers. • Suspension ID Tag information (Refer to Hendrickson Lit. No. L977 ID Guide , page 2 for tag lITERATURE location and details): If you suspect your version of this or any other –...

  • Page 7: Preparing Trailer For Service

    PREPARING TRAIlER fOR SERVICE NOTE: DO NOT service a suspension or any components that are under warranty without first contacting Hendrickson Technical Services. Refer to CONTACT HENDRICKSON for details. WARNING: To prevent serious eye injury, always wear safety glasses when performing trailer maintenance and service.

  • Page 8: General Information

    TIREMAAX PRO. System highlights include: Inflate capacity (one tire in 10 psi 69 kPa approximately two minutes) • TIREMAAX PRO and CP controllers use trailer air tank supply to provide a constant regulated target Table 2: TIREMAAX PRO and CP general specifications ®...

  • Page 9: Operation

    . If the tire pressure increases pressure at target. above this setting, the TIREMAAX PRO controller will exhaust air and maintain pressure at this higher value. NOTE: For the TIREMAAX controller to function properly, trailer air must be clean, dry and...
  • Page 10 InstallatIon, servIce and troubleshootIng Procedures Hubcap Inner tire hose Rotary union Tire Spindle plug hose port Axle hose Rubber grommet Outer tire hose Test port vent (if included) Power and Indicator Integrated pressure lamp connection control unit (IPCU) DELIVERY Main power harness dump ports (2) (J560 interface) DELIVERY port...

  • Page 11: Component Description

    HUBCAP • Internal components include: Although the same casting is used for each hubcap, TIREMAAX PRO will have the word “PRO” on – IPCU (Integrated Pressure Control Unit) the hubcap window. Each hubcap is configured » Regulates air flow from trailer air tank to and assembled to match the requirements of the tires.

  • Page 12: Axle Hoses And Fittings

    InstallatIon, servIce and troubleshootIng Procedures – (PRO only) Hubcap wheel valves - TIRE HOSES » Identified by red anodized plate inside • Do not require modification to the standard valve hubcap. stem or core. » Assumes function of tire hose check valve. •...

  • Page 13: Installation

    For application procedures for drilling holes and other steps required and installation questions, refer to CONTACT to prep a Hendrickson axle to receive hoses and HENDRICKSON on page 6. fittings. INSTAllATION MATERIAlS AND SUPPlIES...
  • Page 14 ® ® IMPORTANT: As shown above, the edge of any NOTE: If pre-drilled by Hendrickson, the second hole hole must be a minimum of ½ inch in the window wrap is on the roadside and (12 mm) away from the edge of the accommodates an axle vent assembly.
  • Page 15 ¼-18 NPTF-1 thread per ANSI B1.20.3 Figure 7: Hendrickson TRLAXLE drilling details ® NOTICE: Before drilling, make sure holes NOTE: Figure 7 drilling details are for Hendrickson will not interfere with suspension TRLAXLE . If other than TRLAXLE, CONTACT ®...

  • Page 16: Axle Component Installation

    ® the metal braided hose into the hole closest to the TRlAXlE spindle end (Figure 8). On Hendrickson ® Trailer Axles, route the small end of the metal braided hose into the hole closest to the spindle.

  • Page 17: Additional Axles

    ® following diagrams (Figure 10 to Figure 14). Extend to support 5 or more axles. CONTACT the main 3/8 inch tubing as necessary. HENDRICKSON for details. Without SURElOK With SURElOK ® Route control line through Route control line through either...

  • Page 18: Axle Vent Installation

    ® ½ inch diameter but axle vent installation is the same for clear plastic tube Hendrickson Trailer Axles. On these axles, oriented downward the vent tube is installed in the center hole (refer to Figure 7). Figure 15: Typical axle vent installation...
  • Page 19 2.75 inches S-28146-3 Plug Driver Handle S-27399 Before March 28, 2003, Hendrickson manufactured HP spindles with both 2.50” and 2.75” inner bore diameters. After this date, the HP spindle bore was standardized at 2.75”. Figure 17: Spindle plug installation T51002 E...

  • Page 20: Spindle Plug Installation

    Figure 18. If using the tool, be sure to select the correct tool size for your application. Hendrickson recognizes that the tool may not always be available or cost effective. For this reason, Figure 18 provides the recommended depth dimensions.

  • Page 21: Hubcap Installation

    50 ± 5 in. lbs. (5.7 ±0 .6 N•m). Hendrickson dressed axles, skip to TIRE HOSE INSTALLATION on NOTICE: for clocking of tire hose positioning, page 23. CONTACT HENDRICKSON review TIRE HOSE INSTALLATION on Technical Services before removing any page 23 before proceeding.
  • Page 22 InstallatIon, servIce and troubleshootIng Procedures Not OK, extends beyond hubcap and rim Figure 21: Tire hose installation sample <90° NOTE: When the wheel is installed, verify: • Tire hose is not stretched so tightly a strain is introduced at either the valve stem or hubcap. •...

  • Page 23: Tire Hose Installation

    InstallatIon, servIce and troubleshootIng Procedures TIRE HOSE INSTAllATION IMPORTANT: Hold tire hose with free hand to prevent Tire hoses connect the hubcap port to the valve stem side loading and avoid cross threading. on the tire. The knurled nut should easily turn 3 to 4 rotations by hand.

  • Page 24: Controller Installation

    • Provide a secure and stable mounting surface. Figure 27: Controller mounting to slider • Allow access for maintenance. slider box mounting Hendrickson (Figure 27, ® • Provide easy access to a reservoir, emergency/ mounted low to avoid interference with slider stop supply line and delivery lines.

  • Page 25: Manifold Installation

    Figure 31: Mounting to ULTRAA-K front crossmember MANIfOlD INSTAllATION The optional manifold offers the following advantages: NOTE: For TIREMAAX PRO only. Use existing fasteners at bottom • Simpler installation of controller. Remove, then replace after positioning on • Improved air distribution and flow to tires; fewer bracket.

  • Page 26: Control Line Installation

    InstallatIon, servIce and troubleshootIng Procedures CONTROl lINE INSTAllATION 0.925 ø 0.270 Controller line installation criteria varies with suspension type, axle type and TIREMAAX model ® 1.000 (CP or PRO). 0.843 2.60 Plumbing diagrams show air brake tubing sizes and 4.25 associated fittings required to complete the system Tandem (four port) manifold installation.
  • Page 27 InstallatIon, servIce and troubleshootIng Procedures Front Trailer air tank NOTE: To maintain adequate airflow, all air lines coming into and going out of the To height control valve controller assembly must be inch. All junctions of two or more inch lines must be supplied by inch line.
  • Page 28 InstallatIon, servIce and troubleshootIng Procedures NOTE: To maintain adequate airflow, all air lines coming Trailer air tank into and going out of the Front controller assembly must be inch. All junctions of two or more inch lines must be supplied by inch line.
  • Page 29 Run tee; inch NPT male, inch NTA, inch NTA These parts are available from Hendrickson. Refer to LITERATURE on page 6 to get part numbers. May be provided with Height Control Valve (HCV) or Dock Stabilizing Technology™ (DST ) kit. ®...
  • Page 30 InstallatIon, servIce and troubleshootIng Procedures Front Trailer air tank NOTE: To maintain adequate airflow, all air lines coming into and going out of the To height control valve controller assembly must be inch. All junctions of two or more inch lines must Emergency supply IN be supplied by inch line.
  • Page 31 InstallatIon, servIce and troubleshootIng Procedures NOTE: To maintain adequate airflow, all air lines coming Trailer air tank into and going out of the Front controller assembly must be inch. All junctions of two or more inch lines must be supplied by inch line.
  • Page 32 K. Emergency supply IN fitting inch NPT male to inch NTA These parts are available from Hendrickson. Refer to LITERATURE on page 6 to get part numbers. May be provided with Height Control Valve (HCV) or Dock Stabilizing Technology™ (DST ) kit.

  • Page 33: Electrical Component Installation

    This section includes basic instructions for routing and Electrical components include: installation of optional wire harnesses available from • Wire Harnesses Hendrickson. Detailed information and criteria are also • Controller connectors provided: • Trailer-mounted indicator lamp • Figure 40 shows a typical wiring schematic for the (may not be included with TIREMAAX kit) TIREMAAX systems.

  • Page 34: Standard Wire Harness Installation

    Premium ® and ground connection according to Figure 40. 15 ft. power harness. If desired, a 3 ft. version of this cable is also available. Contact Hendrickson Plug male harness connector into female Aftermarket or OE Sales at 866-RIDEAIR (743-3247) connector of controller assembly.

  • Page 35: Trailer-Mounted Indicator Lamp Installation

    For PRO - The test procedure for validating proper Secure harness every 12 to 18 inches using TIREMAAX PRO controller function during the nylon ties or other wire management hardware application of the emergency brakes should be as such as conduit or wire trays.

  • Page 36: Decal Location

    In the event of a system leak, set the trailer park brake, then close the controller supply valve. NOTE: If equipped with TIREMAAX PRO, while trailer park brakes are set, lamp operation is disabled and no delivery pressure is present. For complete service details, refer to Hendrickson publication T51002, TIREMAAX Installation, Service and Troubleshooting Procedures .

  • Page 37: Troubleshooting

    Repeat process until the problem is resolved. If air to completely exhaust from tires. help is required, refer to CONTACT HENDRICKSON This allows the driver to cautiously on page 6. transport trailer to the nearest service center.

  • Page 38: Troubleshooting Matrix

    For details on Effects (letters), refer to page 39; for numbered Probable Causes, refer to page 40. If the problem is not found within this matrix, CONTACT HENDRICKSON for assistance. A B C D E f G H J K l M N O P Q...

  • Page 39: List Of Effects With Descriptions

    For a PRO system, refer to effect K. Air exhausting from delivery This would be normal for a TIREMAAX PRO during deflation or for 1 to 2 seconds after dump ports applying emergency brake. Excess delivery pressure is exhausted from the delivery dump ports within the controller (Figure 52 on page 50).

  • Page 40: Probable Causes With Recommended Fix

    InstallatIon, servIce and troubleshootIng Procedures PROBABlE CAUSES WITH RECOMMENDED fIX As with the list of effects, one or more probable causes may apply. For each effect selected, choose the most likely probable cause or ones that are easy to investigate first. Footnotes are located at end of table. PROBABlE CAUSES DESCRIPTION RECOMMENDED fIX...
  • Page 41 PPV not The Hendrickson PPV has an opening pressure of If the pressure in the tank is known to be above 80 psi 75 ± 5 psi and a closing pressure of 70 ± 5 psi. For...
  • Page 42 Insufficient air 1. Air tank pressure must be greater than Check truck air outlet and correct as needed. 75 ± 5 psi to open Hendrickson’s PPV. See tank pressure Inspect hoses and fittings from gladhand coupling probable cause 17.
  • Page 43 InstallatIon, servIce and troubleshootIng Procedures PROBABlE CAUSES DESCRIPTION RECOMMENDED fIX Loose wire or Loose wires can lead to no or intermittent Refer to Figure 40 and Figure 41 on page 33 to connection illumination of the indicator lamp during inflation. trace and check all electrical connections.

  • Page 44: Service Procedures

    All CP Target Gauge SETTING CP TARGET PRESSURE connections must be air tight. VS-32344 on page 48 TIREMAAX PRO Target SETTING TIREMAAX® PRO TARGET 2. Check: Gauge VS-32331 PRESSURE on page 50 A. Regulator delivery pressure...

  • Page 45: Indicator Lamp Test

    InstallatIon, servIce and troubleshootIng Procedures Ensure TIREMAAX supply valve is in open position WARNING: Chock all wheels before beginning (Figure 46). this procedure. Refer to PREPARING TRAIlER fOR SERVICE on page 7 Inspect hoses and components for damage and for details. listen for audible indications of a leak.

  • Page 46: Manually Check Tire Pressure

    InstallatIon, servIce and troubleshootIng Procedures A. If included: The current PRO controller MANUAlly CHECK TIRE PRESSURE includes a test port vent tool that threads into the test port (Figure 47) in the STORE position. WARNING: To prevent injury, always wear eye To perform a lamp test: protection when maintaining or servicing the vehicle.

  • Page 47: Disable Tiremaax ® Tis

    InstallatIon, servIce and troubleshootIng Procedures NOTE: If a hose is removed, the system will: • Isolate disconnected tire. • Continuously maintain target pressure for all connected tires. IMPORTANT: While tire hoses are removed at the hubcap, a check valve (spring type valve core - 2 to 3 psi), in the tire hose, prevents air leaking from tire.

  • Page 48: Setting Cp Target Pressure

    Figure 51: CP target gauge VS-32344 Monitor delivery pressure on the gauge: NOTE: The TIREMAAX PRO target gauge (Figure 53 Close supply valve (Figure 50). on page 50) can not be used in place of the CP target gauge.

  • Page 49: Adjusting Cp Delivery Pressure

    InstallatIon, servIce and troubleshootIng Procedures a tire leak. locate and repair leak. Refer to iii. Turn knob clockwise again to the desired CHECKING FOR AIR LEAKS on page 44. cold target pressure setting. Open supply valve and allow tires to inflate to Close controller supply valve on the supply line target pressure before continuing.

  • Page 50: Setting Tiremaax ® Pro Target Pressure

    PRO TARGET ® REQUIRED TOOlS AND RESOURCES PRESSURE The following tools and resources are required to The TIREMAAX PRO controller is pre-set at the factory, adjust TIREMAAX PRO controller settings. normally not required. If therefore additional setup is • Clean, dry shop air capable of supplying at least...

  • Page 51: Checking Pro Cold Target Pressures

    Once charged, disconnect from emergency brake Two target pressures, inflation and deflation, are set gladhand (Figure 53). for TIREMAAX PRO systems. Deflation must be set 10 psi above inflation pressure. Check PRO INFLATION Pressure. A. Ensure target gauge shop supply valve is...
  • Page 52 InstallatIon, servIce and troubleshootIng Procedures Open the emergency brakes and open the controller gauge shop supply valve. The flowing air supply valve. should create an audible sound that will stop when current deflation pressure is reached. Remove regulator cap by pulling to right side. Close gauge shop supply valve.

  • Page 53: Wiring Harness Replacement

    Label the line “DELIVERY” to avoid confusion when the new REPlACING PREMIUM ABS JUNCTION HARNESS controller assembly is installed. This procedure applies to Hendrickson components as listed in Figure 41 on page 33. remove 6. If reusing air fittings, air fittings from the ports on the controller assembly.

  • Page 54: Wheel Removal And Installation

    InstallatIon, servIce and troubleshootIng Procedures Test tighten tire hose / for air leaks by listening or using soapy 7. Using a 7/16 inch wrench, valve stem connection water. Refer to CHECKING FOR AIR LEAKS on an additional one-half turn (Figure 54). Do not overtighten this connection. page 44.

  • Page 55: Appendix A: Glossary

    OE or OEM Original Equipment Manufacturer (Pressure Relief Module) A unit in a TIREMAAX PRO controller that allows tire deflation. Rotary union Rotary air seal assembly that allows air transfer from wheel end to tire(s) while vehicle is in motion. The rotary joint is always pressurized when the supply valve is open.

  • Page 56: Appendix B: Expected Performance

    InstallatIon, servIce and troubleshootIng Procedures APPENDIX B: EXPECTED PERfORMANCE Figure 55 charts expected tire pressure change, temperature matched an ambient temperature of without a Tire Inflation System, relative to changes in 70º F when the tire was inflated to 100 psi. The trailer ambient temperature.
  • Page 57 InstallatIon, servIce and troubleshootIng Procedures TIRE PRESSURE VS. TEMPERATURE Set 100 psig at 70º F Drops to 89 psig at 20º F Temperature (ºF) Figure 56: Typical tire maintenance system performance at 100 psig T51002 E...
  • Page 58 InstallatIon, servIce and troubleshootIng Procedures NOTES: T51002 E...
  • Page 59 InstallatIon, servIce and troubleshootIng Procedures T51002 E...
  • Page 60 Call your trailer dealer or Hendrickson at 866.RIDEAIR (743.3247) for additional information. TRAILER COMMERCIAL VEHICLE SYSTEMS Hendrickson Canada Hendrickson Mexicana 2070 Industrial Place SE 250 Chrysler Drive, Unit #3 Circuito El Marqués Sur #29 Canton, OH 44707-2641 USA Brampton, ON Canada L6S 6B6 Parque Industrial El Marqués...

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