ARBER TRU Compliance Information Help Page

This page last reviewed on March 7, 2012.

ARBER is the ARB Equipment Registration software for the Transport Refrigeration Unit (TRU) ATCM and the Drayage Truck Regulation.  The ARBER system was designed to provide owners of TRU or TRU generator sets (gensets) with a method of registering their equipment online to determine compliance with the TRU ATCM.  ARBER will automatically issue an ARB identification number (IDN) for fully compliant TRU/TRU gensets.  Initial registration in ARBER will allow you to create a company profile, establish users and user accounts for your company, and receive an Owner Operator Number (OON).  The information below is provided to help registrants complete the TRU Model Information page in ARBER.

How do I achieve compliance with the ATCM for my TRU engine?
The TRU ATCM requires in-use TRU and TRU generator set engines that operate in California to meet in-use performance standards that vary by horsepower range.

These standards can be met by:
a) Retrofitting the engine with the required level of verified diesel emission control strategy (VDECs), or
b) Using an Alternative Technology.

The In-Use Performance Standards have two levels of stringency:  The Low-Emission TRU In-Use Performance Standards (LETRU) apply to model year 2003 and older TRUs.  The more stringent Ultra-Low Emission TRU In-Use Performance Standards (ULETRU) must be met be all TRUs that operate in California in future years.  The LETRU and ULETRU emissions reduction and thecompliance schedule are shown on pages 10-11 of the TRU Frequently Asked Questions (FAQ) document.

Below is a list of the terms used, further information, entry instructions, and links to additional information on the ARBER TRU compliance web page.  Your TRU owner's manual and TRU dealership should be consulted if you have trouble locating specific information on your unit.

If you have further quetions on any of these terms or are having difficulty completing the information on the ARBER TRU Compliance Information Page, please contact the toll-free TRU Help Line at:  1-888-TRU-ATCM (1-888-878-2826).

Information submitted must be true, accurate, and complete.  Within 30 days of a change in ownership or compliance status, the new information must be entered in the ARBER system.  This includes updates to the company profile and primary contact information.  Failure to report updates or submittal of false information is a violation of state law subject to civil and criminal penalties.
TRU Engine Information
TRU Engine Manufacturer Required field.  Click on the drop-down box and select the engine manufacturer that appears on the engine label. If the engine manufacturer is not included on the drop-down list, please call the TRU Help Line (see above). If the engine has no label, consult your TRU owner’s manual or TRU dealership. See Carrier Unit & Engine Label  for ARBER.  See Thermo King Unit and Engine Label for ARBER.
TRU Engine Model Required field. Enter the engine model that appears on the engine label.   If the engine has no label, consult your TRU owner’s manual or TRU dealership.  See Carrier Unit & Engine Label  for ARBER.  See Thermo King Unit and Engine Label for ARBER.
TRU Engine Model Year Required field. Enter the engine model year that appears on the engine label.  For orginal engines, see links to the right.  For replacement or rebuilt engines, use the effective model year based on tier (see table below).

Effective Model Years for Replacement and Rebuilt Engines

Horse Power Tier 1 Tier 2 Tier 4i
Less than 25 2004 2007 Use Model Year
Greater than or equal to 25 2003 2007 Use Model Year


See Carrier Unit & Engine Label  for ARBER.  See Thermo King Unit and Engine Label for ARBER.  If the engine has no label, consult your TRU owner’s manual or TRU dealership. 
TRU Engine Serial Number
TRU Engine Serial Number

Required field.  Without the engine serial number there is no way to reliably track this engine in the ARB registration system and the engine must be replaced by December 31, 2008.

Engine serial numbers may be found:
1. Stamped onto a machined surface on the engine block,
2. On a label that is attached to the valve cover, or
3. On a label that is attached to the crankcase oil pan.

 See Carrier Unit & Engine Label  for ARBER.  See Thermo King Unit and Engine Label for ARBER.  If the engine has no label, consult your TRU owner’s manual or TRU dealership.
TRU Engine Power Rating The power rating that is shown on the TRU engine emissions label.  Click on the drop-down menu and select either "under 25 hp (under 19 kW)" or "over 25 hp (over 19 kW)".  See the pictures of the engine labels.  See Carrier Unit & Engine Label  for ARBER.  See Thermo King Unit and Engine Label for ARBER.
Compliance Status
Original TRU Engine Check this button if the engine listed in the TRU/TRU Generator Set section above is the original TRU engine. ARBER defaults to this option if a replacement engine option is not selected.
Replacement Engine, New Click this button if the original engine was replaced with a new replacement engine.
Replacement Engine Tier Required of all new replacement engines. Click on the drop-down box and select the appropriate tier. New replacement engines must have a label that describes the emission standards that the engine was manufactured to.  Click here for sample labels for each tier.

Click here to download the PDF version of the table.
Click to enlarge chart.
Sample label for Kubota 2008 Current Tier 4i.
Click here to view a large image and additional labels.


Sample label for Yanmar 2009 Current Tier 4i.
Click here to view a large image additional labels.
Installation Date of Replacement Engine Required field if replacement engine is selected.  Provide the date that the replacement engine was installed.
Replacement Engine, Rebuilt Click this button if the original engine was replaced with a rebuilt or remanufactured engine.  See TRU Advisory 08-05:  “Rebuilt/Remanufactured Engines for TRU Compliance” for more detailed information.
Rebuilt Engine Tier Required of all rebuild replacement engines.  Click on the drop-down box and select the tier that appears on the supplemental label.  Rebuilt engines must have a supplemental label that includes the name of the rebuilder, year of the rebuild, horsepower, and the emissions standard being met (e.g. Tier 1, Tier 2, Tier 4i, or Tier 4f).  If a rebuilt engine has no supplemental label providing the tier of the emissions standard being met, then the engine shall be assumed to have been rebuilt to an uncertified configuration and the effective model year shall default to the last pre-Tier 1 year.  Such a rebuilt engine must first meet LETRU by December 31, 2008. See TRU Advisory 08-05: “Rebuilt/Remanufactured Engines for TRU Compliance” for more detailed information.


Sample label for Reviva Tier 2
Year of Rebuild Required of all rebuild replacement engines. Enter the year of the rebuild that is shown on the supplemental label on the rebuilt engine. Rebuilt engines are required to have a supplemental label listing the name of the rebuilder, year of rebuild, and tier of the emissions standard being met.  If a rebuilt engine has no supplemental label providing the required rebuild information, then the engine shall be assumed to have been rebuilt to an uncertified configuration and the effective model year shall default to the last pre-tier 1 year.
Installation Date of Rebuilt Engine Required field if rebuilt engine is selected.  Provide the date that the replacement engine was installed.
Verified Diesel Emissions Control Strategy (VDECS)
Verified Diesel Emissions Control Strategy (VDECS) Click this button if the engine was retrofit with a VDECS.  The TRU website lists VDECS that meet Level 2 and Level 3 for the TRU application at http://www.arb.ca.gov/diesel/tru/tru.htm. A Level 2 VDECS is required to meet LETRU.  A Level 3 VDECS is required to meet ULETRU.  VDECS listed on TRU website:  http://www.arb.ca.gov/diesel/tru/tru.htm
VDECS Manufacturer Name Required if VDECS is clicked. Using the drop-down menu choose the name of the manufacturer of the VDECS you have installed on your engine that appears on the VDECS label. Options:  HUSS, Proventia, Rypos
VDECS Family Name Required if VDECS is clicked.  Using the drop-down menu choose the family name that appears on the VDECS label. Family names coincide with manufacturer names, therefore if you select a family name that does not match with the manufacturer you will receive an error message.

Proventia:  
                  CA/PEC/2008/PM2+/N00/OF/FTF01
 Rypos:    
                 CA/RYP/2009/PM2+/N00/OF/DPF01
                 CA/RYP/2011/PM3+/N00/TR/DPF01
HUSS Umweltechnik FS-MK:                                                              CA/HUS/2010/PM3+/N00/OF/DPF01
                 CA/HUS/2011/PM3+/N00/OF/DPF01
VDECS Serial Number Required if VDECS is clicked.  Type in the VDECS serial number that appears on the VDECS label.

Listed below are known serial number formats where  A/N represents alpha-numeric; N for numeric; M for month of manufacture; Y for year of manufacture; and P, T, and R are stationary letters.

Proventia: MMYYA/NPNNNNN 
Rypos:  TNNNN  
Huss:  NNNN-RNN 
VDECS Manufacture Date Required if VDECS is clicked.  Type in the VDECS manufacture date using a month-year format:  MM-YY that appears on the VDECS label.
VDECS Installation Date Required if VDECS is clicked.  Enter the date the VDECS was installed in MM/DD/YYYY format.
Alternative Technology
Alternative Technology Click this button if your TRU uses an Alternative Technology to comply.  Then, select the button indicating the type of alternative Technology (one type must be selected:  electric standby, cryogenic temperature control).
Electric Standby Electric standby may be used to comply with LETRU and ULETRU if diesel particulate matter emissions are eliminated at all facilities (with limited exceptions) and records are kept to demonstrate compliance. See TRU Advisory 08-02 : “Electric Standby and Hybrid Electric Option” for more details
Cryogenic Refrigeration Systems Cryogenic refrigeration systems are exempt from the TRU ATCM if there is no internal combustion engine used to power the refrigeration system.  Hybrid cryogenic refrigeration systems that include an internal combustion engine may be used to comply with LETRU and ULETRU if diesel particulate matter emissions are eliminated at all facilities (with limited exceptions) and records are kept to demonstrate compliance. See TRU Advisory 08-13:  “Use of Hybrid Cryogenic Refrigeration Systems” for more details
Alternative Fuel, CNG Click this button if the engine is fueled by compressed natural gas.
Alternative Fuel, LNG Click this button if the engine is fueled by liquefied natural gas.
Date Alternative Technology was Employed Enter the date that you began using the Alternative Technology in a way that qualifies for compliance (e.g. using it in a way that eliminates the diesel engine operation or emissions at all facilities).  This date is considered your "compliance date." See TRU Advisory 08-02 : “Electric Standby and Hybrid Electric Option” for more details.  See TRU Advisory 08-13:  “Use of Hybrid Cryogenic Refrigeration Systems” for more details.
Installer Information
Installer Name and Contact Information Required if VDECS or replacement engine is clicked.  Provide the name of the company that installed the VDECS or replacement engine.  Also provide the complete address and telephone number of the installer in the spaces below the name.

ARBER Registration


preload